Fault-guided safety device, power safety system and standby automatic interlocking control system

Abstract

The present invention provides a fault-guided safety device, an electric safety system and a standby automatic re-entry interlock control system, comprising a switch part, wherein the two sides of the switch part are the input side and the output side respectively, the switch part is in a conducting state when there is no electricity, the fault-guided safety device is in a conducting state, the switch unit of the switch part is a normally closed relay or contactor, the three phases A, B, and C on the input side are all without electricity, the first outgoing line and the second outgoing line are in a conducting connection state, any two phases A, B, and C on the input side are powered, and the first outgoing line and the second outgoing line are in a disconnected state. Beneficial effects of the present invention: the fault-guided safety device has a simple structure and a reasonable design. By setting the fault-guided safety device, real-time monitoring of the power supply of the line can be achieved. When the electrical interlock fails or a fault occurs, the power supply system or the standby automatic re-entry system can be guaranteed to operate safely when the faulty line is closed, and accidents can be avoided. The safety of closing can be ensured, and the safety of personnel and electrical appliances can be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power equipment, and in particular relates to a fault-guided safety device, an electric power safety system, and a standby automatic switching interlocking control system. Background Art

[0002] With the development of modern technology, the power equipment of enterprises is becoming more and more complex, which puts forward higher requirements on the safety, reliability and intelligent management of the power distribution system. When the low-voltage power circuit is powered off, the automatic switching system of the backup power supply (automatic switching system) is often used to switch to the backup circuit to ensure the continuity of power supply.

[0003] Because the backup automatic switching system has high safety requirements, it is necessary to use electrical interlocking and mechanical interlocking to ensure the safety of closing the switch after switching. However, when the two incoming cabinets are far apart, mechanical interlocking cannot be achieved, and only a single electrical interlocking can be used. However, the existing electrical interlocking is to connect the normally closed contacts of two disconnect switches in parallel and then connect them in series to the closing signal of another disconnect switch. The safety is not high. Therefore, if the electrical interlock fails, when the main line is powered on and closed, the electrical interlock will not play a protective role, and an explosion may occur, which cannot ensure the stability and safety of the low-voltage power distribution system.

[0004] Patent application number CN201310397538.6, the patent name is a backup power automatic switching device, which adopts the technical solution of double-position interlocking relay to improve the wiring method of the secondary side wiring of the voltage transformer P, meet the logical requirements of complex backup automatic switching devices, solve the design defects and deficiencies of the primary equipment of the high-voltage distribution system, and improve the reliability of the power supply system operation; avoid the occurrence of major accidents such as protection refusal and malfunction caused by improper operation; effectively improve the reliability of the microcomputer backup automatic switching device, but the technical solution adopts a double-position interlocking relay, which requires In the secondary side circuit of the voltage transformer PT of the main power supply and the backup power supply, the power supply contacts of the start coil and the reset coil control end of the double-position relay are connected, and through the normally open contacts of the double-position interlocking relay SWJ, the secondary side circuits of the voltage transformer PT of the main power supply and the backup power supply are electrically connected to the main power bus 110KV-4 and the backup power bus 110KV-5 respectively; it needs to be matched with the original line equipment, and the replacement and construction costs are high. In addition, if only the double-position interlocking relay SWJ is used, the failure cannot be avoided and the safety of the backup automatic switching cannot be guaranteed, which causes huge losses to the power grid. Summary of the invention

[0005] In order to solve the above problems and overcome the defects in the prior art, a fault-guided safety device, a power safety system, and a multi-channel power safety system are provided, which can be applied to the self-supporting power supply system. After the backup power supply is automatically switched, when the faulty line is closed, the power supply of the line can be monitored in real time to ensure the safety of closing the circuit, and protect the safety of personnel and electrical appliances.

[0006] To achieve the above-mentioned purpose, the present invention provides a fault-guided safety device, which is characterized in that it includes a switching part, wherein the two sides of the switching part are an input side and an output side respectively, when the switching part is energized and in a disconnected state, the fault-guided safety device is in a disconnected state; when the switching part is not energized, it is in a conducting state, and the fault-guided safety device is in a conducting state.

[0007] Preferably, the switching part includes one or three switching units in series, the normally closed relay or contactor is in an open state when energized; the normally closed relay or contactor is in a closed state when not energized, the connection of one of the three normally closed relays or contactors in series is detected to be energized, the detection detects that the normally closed relay or contactor that is energized is in an open state, the three normally closed relays or contactors in series are not connected, and the switching part is in an open state when energized.

[0008] Preferably, the input side includes two terminals L and N for a single phase or four terminals A, B, C, and N for a three phase; and the output side includes a first output terminal and a second output terminal.

[0009] The three phases A, B, and C on the input side are not energized, the first outgoing line and the second outgoing line are in a conductive connection state, and the fault-guided safety device is in a conductive state.

[0010] Any one of the three phases A, B, and C on the input side is energized, and the first outgoing line and the second outgoing line are in a disconnected state.

[0011] The power safety system includes an incoming line circuit, which is connected to a standby incoming line circuit through a busbar, and a disconnect switch is arranged on the incoming line circuit. The system is characterized in that it also includes a fault-guided safety device, which is arranged at the lower end of the disconnect switch.

[0012] Preferably, the input side of the fault-directed safety device is arranged at the lower port of the disconnect switch, and the output side of the fault-directed safety device is connected in series to the closing control circuit.

[0013] The disconnect switch is in the open state and a closing command is to be executed. If the lower port of the disconnect switch is energized, the fault-guided safety device is in the open state, the closing control circuit is disconnected, and the disconnect switch cannot be closed successfully;

[0014] The disconnect switch is in the open state and a closing command is to be executed. If the lower port of the disconnect switch is not energized, the fault-directed safety device is in the on state, the closing control circuit is turned on, and the disconnect switch is closed successfully.

[0015] Preferably, the closing control circuit comprises a closing switch, a closing control coil and a closing power supply, and the closing control coil is used to control the closing of the disconnect switch.

[0016] The disconnect switch is in the open state, and a closing command is to be executed. The closing switch is closed. If the lower port of the disconnect switch is energized, the fault-guided safety device is in the open state, the closing control circuit is disconnected, the closing control coil is not energized, and the disconnect switch cannot be closed successfully;

[0017] The disconnect switch is in the open state, and a closing command is to be executed. The closing switch is closed. If the lower port of the disconnect switch is not energized, the fault-directed safety device is in the on state, the closing control circuit is turned on, the closing control coil is not energized, and the disconnect switch is closed successfully.

[0018] The power safety system comprises a busbar, wherein the busbar is provided with a bus-tie disconnecting switch, and is characterized in that it also comprises a fault-guiding safety device, wherein the fault-guiding safety device is respectively provided on both sides of the bus-tie disconnecting switch;

[0019] Furthermore, the input sides of the two fault-oriented safety devices are arranged on both sides of the bus tie disconnect switch, and the output sides of the fault-oriented safety devices are connected in parallel and then in series to the closing control circuit of the bus tie disconnect switch;

[0020] Furthermore, the closing control circuit includes a closing switch, a closing control coil and a closing power supply, and the closing control coil is used to control the closing of the busbar disconnect switch.

[0021] A multi-circuit electricity safety system adopts dual power supply, the power supply includes a first AC power supply and a second AC power supply, a first incoming line disconnect switch and a second incoming line disconnect switch are respectively arranged on the incoming lines of the first AC power supply and the second AC power supply, and is characterized in that it also includes a fault-guided safety device, and the lower ends of the first incoming line disconnect switch and the second incoming line disconnect switch are both provided with the fault-guided safety device.

[0022] Furthermore, the input sides of the two fault-guided safety devices are respectively arranged at the lower ports of the first incoming line disconnect switch and the second incoming line disconnect switch, and the output sides of the two fault-guided safety devices are respectively connected in series to the closing control circuits corresponding to the first incoming line disconnect switch and the second incoming line disconnect switch.

[0023] Furthermore, the closing control circuit includes a closing switch, a closing control coil and a closing power supply, and the closing control coil is used to control the closing of the busbar disconnect switch.

[0024] The multi-circuit electricity safety system adopts a dual power supply with a diesel generator. The power supply includes a first AC power supply, a second AC power supply, and a diesel generator. The first AC power supply, the second AC power supply, and the diesel generator incoming line are respectively provided with a first incoming line disconnect switch, a second incoming line disconnect switch, and a diesel generator incoming line disconnect switch. The system is characterized in that it also includes a fault-guided safety device. The first incoming line disconnect switch, the second incoming line disconnect switch, and the lower port of the diesel generator incoming line disconnect switch are all provided with the fault-guided safety device.

[0025] Furthermore, the input sides of the three fault-oriented safety devices are respectively arranged at the lower ports of the first incoming line disconnect switch, the second incoming line disconnect switch, and the diesel generator incoming line disconnect switch, and the output sides of the fault-oriented safety devices are connected in series to the closing control lines corresponding to the first incoming line disconnect switch, the second incoming line disconnect switch, and the diesel generator incoming line disconnect switch. The multi-way power safety system adopts a two-incoming line and one-bus tie structure, the power supply includes a first mains power supply and a second mains power supply, the first mains power supply and the second mains power supply incoming lines are respectively provided with a first incoming line disconnect switch and a second incoming line disconnect switch, the first mains power supply and the second mains power supply incoming lines are connected through a busbar, the busbar is provided with a busbar disconnect switch, and is characterized in that it also includes a fault-oriented safety device, the lower ports of the first incoming line disconnect switch and the second incoming line disconnect switch are both provided with the fault-oriented safety device, and the fault-oriented safety devices are respectively provided on both sides of the busbar disconnect switch.

[0026] Furthermore, the two input sides of the fault-guided safety device are respectively arranged at the lower ports of the first incoming line disconnect switch and the second incoming line disconnect switch, and the output side of the fault-guided safety device is connected in series to the closing control circuits corresponding to the first incoming line disconnect switch and the second incoming line disconnect switch.

[0027] Furthermore, the input sides of the two fault-oriented safety devices are arranged on both sides of the bus tie disconnect switch, and the output sides of the fault-oriented safety devices are connected in parallel and then in series to the closing control circuit of the bus tie disconnect switch.

[0028] A multi-circuit power safety system adopts a two-incoming line and one busbar with a diesel generator. The power supply includes a first mains power supply, a second mains power supply, and a diesel generator. The first mains power supply, the second mains power supply, and the diesel generator incoming line are respectively provided with a first incoming line disconnect switch, a second incoming line disconnect switch, and a diesel generator incoming line disconnect switch. It is characterized in that the first incoming line disconnect switch, the second incoming line disconnect switch, and the diesel generator incoming line disconnect switch are all provided with the fault-guided safety device at their lower ports. The first mains power supply, the second mains power supply, and the diesel generator incoming line are connected through a busbar, the busbar is provided with a busbar disconnect switch, and the busbar disconnect switches are respectively provided with the fault-guided safety device.

[0029] Furthermore, the input sides of the three fault-guided safety devices are respectively arranged at the lower ends of the first incoming line disconnect switch, the second incoming line disconnect switch, and the diesel generator incoming line disconnect switch, and the output sides of the fault-guided safety devices are connected in series to the closing control circuits corresponding to the first incoming line disconnect switch, the second incoming line disconnect switch, and the diesel generator incoming line disconnect switch.

[0030] Furthermore, the input sides of the two fault-oriented safety devices are arranged on both sides of the bus tie disconnect switch, and the output sides of the fault-oriented safety devices are connected in parallel and then in series to the closing control circuit of the bus tie disconnect switch.

[0031] A self-closing interlocking control system for a low-voltage power distribution network, comprising a power supply, the power supply comprising a first mains power supply and a second mains power supply, the first mains power supply and the second mains power supply incoming lines are respectively provided with a first incoming line disconnect switch and a second incoming line disconnect switch, the first mains power supply and the second mains power supply incoming lines are connected through a bus, the bus is provided with a bus-coupled disconnect switch, the first incoming line disconnect switch, the second incoming line disconnect switch, and the bus-coupled disconnect switch corresponding closing control lines are all provided with an electrical interlocking device, characterized in that it also includes a fault-guided safety device, the first incoming line disconnect switch and the second incoming line disconnect switch are both provided with the fault-guided safety device at their lower ports, and the fault-guided safety device is respectively provided at both sides of the bus-coupled disconnect switch;

[0032] Furthermore, the two input sides of the fault-guided safety device are respectively arranged at the lower ports of the first incoming line disconnect switch and the second incoming line disconnect switch, and the output side of the fault-guided safety device is connected in series to the closing control circuits corresponding to the first incoming line disconnect switch and the second incoming line disconnect switch.

[0033] Furthermore, the input sides of the two fault-oriented safety devices are arranged on both sides of the bus tie disconnect switch, and the output sides of the fault-oriented safety devices are connected in parallel and then in series to the closing control circuit of the bus tie disconnect switch.

[0034] The fault-guided safety device, the electric safety system, and the multi-circuit electric safety system of the present invention have the following beneficial effects: the fault-guided safety device provided by the present invention has a simple structure, a reasonable design, and a reliable and simple way to realize on or off. The fault-guided safety device is easy to install, and does not require adjustment to the main line. It only needs to be connected at the lower port of the disconnector or from both sides, and is easy to install. By setting the fault-guided safety device, the power supply of the line can be monitored in real time. When the fault line is closed, the electric safety system, the multi-circuit electric safety system, and the backup automatic switching system can be safely operated to avoid accidents, ensure the safety of closing, and ensure the safety of personnel and electrical appliances.

[0035] The fault-guided safety device is installed at the lower port of the incoming switch of the main incoming line and on both sides of the busbar. When the circuit switch is closed, it is detected in real time whether there is electricity at the lower port of the incoming switch of the line to be closed and on both sides of the busbar. If there is electricity, the standby automatic interlocking system and equipment on the faulty circuit or busbar are disconnected, and the control closing signal cannot be conducted to avoid short circuit after closing, ensuring circuit safety even if the standby automatic electrical interlock or mechanical interlock is damaged, avoiding damage to personnel and electrical appliances, and the system equipment is economical and low cost.

[0036] The backup automatic switching system with fault-guided safety device ensures the safety of electricity use, provides a safer protection mechanism for electrical interlocking, avoids equipment safety in important power supply and distribution scenarios, and greatly improves the continuity and safety of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of a fault-guided safety device provided in Example 1 of the present invention;

[0038] Figure 2 A schematic diagram of the structure of an electricity safety system provided in Embodiment 2 of the present invention;

[0039] Figure 3 A schematic diagram of the structure of an electricity safety system provided in Embodiment 3 of the present invention;

[0040] Figure 4 A schematic diagram of the structure of a multi-circuit power safety system provided in Embodiment 4 of the present invention;

[0041] Figure 5 A schematic diagram of the structure of a multi-circuit power safety system provided in Embodiment 5 of the present invention;

[0042] Figure 6 A schematic diagram of the structure of a multi-circuit power safety system provided in Example 6 of the present invention;

[0043] Figure 7 A schematic diagram of the structure of a multi-circuit power safety system provided in Example 7 of the present invention;

[0044] Figure 8 A schematic diagram of the structure of a standby automatic interlocking control system provided in Example 8 of the present invention;

[0045] Fig. 9 A schematic diagram of the structure of a fault-guided safety device provided in Example 9 of the present invention.

[0046] In the figure, 1, the on-off part, 11, the on-off unit, 2, the input side, 3, the output side, 31, the first output terminal, 32, the second output terminal, 4, the fault-guided safety device, 41, the first incoming line disconnecting switch fault-guided safety device, 42, the second incoming line disconnecting switch fault-guided safety device, 43, the diesel generator incoming line disconnecting switch fault-guided safety device, 44, the busbar disconnecting switch fault-guided safety device, 441, the first busbar disconnecting switch fault-guided safety device, 442, the second busbar disconnecting switch fault-guided safety device, 5, the disconnecting switch, 51, First incoming line disconnect switch, 52, second incoming line disconnect switch, 53, diesel generator incoming line disconnect switch, 6, closing control circuit, 61, closing switch, 62, closing control coil, 63, closing power supply, 7, incoming line circuit, 71, first AC power incoming line, 72, second AC power incoming line, 73, diesel generator incoming line, 8, busbar, 9, busbar disconnect switch, 10, electrical interlocking device, 101, first incoming line disconnect switch electrical interlocking device, 102, second incoming line disconnect switch electrical interlocking device, 103, busbar disconnect switch electrical interlocking device. DETAILED DESCRIPTION

[0047] The standby automatic re-entry interlocking control system and equipment of the present invention are described in detail below with reference to the accompanying drawings.

[0048] Example 1

[0049] Figure 1 The schematic diagram of the structure of the fault-guided safety device provided in Example 1 of the present invention. The fault-guided safety device comprises a switching part 1, and the two sides of the switching part are respectively an input side 2 and an output side 3. When the input side 2 connected to the switching part 1 is energized, the output side 3 is in a disconnected state, and the fault-guided safety device is in a disconnected state; when the input side 2 connected to the switching part 1 is not energized, the output side 3 is in a conducting state, and the fault-guided safety device is in a conducting state.

[0050] The switching part 1 includes three switching units 11 connected in series. The switching units 11 adopt normally closed relays or contactors. The three switching units 11 are Y1, Y2, and Y3 respectively. The normally closed relays or contactors are in an open state when energized; the normally closed relays or contactors are in a closed state when not energized. If any two terminals on the input side 2 of the three normally closed relays or contactors connected in series are energized, the relay or contactor in the energized state is in an open state, and then the three normally closed relays or contactors connected in series are not connected, and the switching part 1 is energized and in an open state.

[0051] The input side 2 includes four terminals A, B, C, and N; the output side 33 includes a first output terminal 31 and a second output terminal 32 .

[0052] There is no power between any two terminals of A, B, C, and N on the input side 2, the first output terminal 31 and the second output terminal 32 are in a conductive connection state, and the fault-guided safety device 4 is in a conductive state.

[0053] When any two terminals among A, B, C, and N of the input side 2 are energized, the first outlet terminal 31 and the second outlet terminal 32 are in a disconnected state, and the fault-directed safety device 4 is in a disconnected state. That is, when any two terminals among A, B, C, and N are energized, the on-off unit 11 between the two energized terminals is disconnected, and then the first outlet terminal 31 and the second outlet terminal 32 are in a disconnected state, and the fault-directed safety device 4 is in a disconnected state.

[0054] Example 1: Three relays are set to normally closed state by default, the input side 2 has four terminals A, B, C, and N, and the output side 3 has the first output terminal 31 and the second output terminal 32. There is no power between any two terminals A, B, C, and N on the input side 2, and the first output terminal 31 and the second output terminal 32 are in the conducting connection state; there is power between any two terminals A, B, C, and N on the input side 2, and the first output terminal 31 and the second output terminal 32 are in the disconnected state.

[0055] Example 2

[0056] Figure 2 A schematic diagram of the structure of an electricity safety system provided in Example 2 of the present invention; the electricity safety system includes an incoming line circuit 7, on which a disconnect switch 5 is arranged, and also includes a fault-guided safety device 4, which is arranged at the lower end of the disconnect switch 5.

[0057] The input side 2 of the fault-oriented safety device 4 is arranged at the lower port of the disconnect switch 5 , and the output side 3 of the fault-oriented safety device 4 is connected in series to the closing control circuit 6 .

[0058] The disconnecting switch 5 is in the open state, and the closing switch is to be closed. The closing switch is a manual switch or a remote control switch. If the lower port of the disconnecting switch 5 is energized, the output side 3 of the fault-guided safety device 4 is in the disconnected state, the closing control circuit is not conductive, and the disconnecting switch 5 cannot be closed successfully;

[0059] The disconnect switch 5 is in the open state, and the closing switch is to be closed. The closing switch is a manual switch or a remote control switch. If the lower port of the disconnect switch 5 is not energized, the output side 3 of the fault-directed safety device 4 is in the on state, the closing control circuit is turned on, and the disconnect switch 5 is closed successfully.

[0060] The closing control circuit 6 includes a closing switch 61, a closing control coil 62 and a closing power supply 63. The closing control coil 6 is used to control the closing of the disconnect switch 5. Other products used to control the closing of the disconnect switch 5 may also be used, such as an electric operating mechanism.

[0061] The disconnecting switch 5 is in the open state, and the closing switch 61 is to be closed. The closing switch 61 is a manual switch or a remote control switch. If the lower port of the disconnecting switch 5 is energized, the output side 3 of the fault-guided safety device 4 is in the disconnected state, the closing control circuit is not conductive, and the closing control coil 62 is not energized, the disconnecting switch 5 cannot be closed successfully;

[0062] The disconnecting switch 5 is in the open state, and the closing switch 61 is to be closed. The closing switch 61 is a manual switch or a remote control switch. If the lower port of the disconnecting switch 5 is not energized, the output side 3 of the fault-guided safety device 4 is in the on state, the closing control circuit is on, the closing control coil 62 is energized, and the disconnecting switch 5 is closed successfully;

[0063] Example 2: The power supply mode is the incoming line circuit of the mains or diesel generator. The four terminals of the input end of the device are respectively connected to the A / B / C / N of the lower port of the disconnect switch 5, and the control coil that controls the closing of the disconnect switch 5 is connected in series to the output side 3 of the device. If the disconnect switch 5 is in the open state and there is power at the lower port, the output side 3 of the fault-guided safety device 4 is in the disconnected state, and the disconnect switch 5 cannot be closed successfully, thereby ensuring the safety of electricity use in this situation; if the disconnect switch 5 is in the open state and there is no power at the lower port, the output side 3 of the fault-guided safety device 4 is in the conducting state, and the disconnect switch 5 can be closed successfully.

[0064] Example 3

[0065] Figure 3 A schematic diagram of the structure of an electric power safety system provided in Embodiment 3 of the present invention; the electric power safety system comprises a busbar 8, a busbar 8 is provided with a busbar disconnect switch 9, and further comprises a fault-guided safety device 4, and a fault-guided safety device 4 is provided on both sides of the busbar disconnect switch 9;

[0066] Fault-guided safety devices 4 are respectively arranged on both sides of the bus tie disconnect switch 9, and the output sides 3 of the two fault-guided safety devices 4 are connected in parallel and then connected in series to the closing control circuit of the bus tie disconnect switch 9;

[0067] The fault-guided safety devices 4 arranged on both sides of the main bus tie disconnect switch 9 are defined as main bus tie disconnect switch fault-guided safety devices 44. The two main bus tie disconnect switch fault-guided safety devices 44 are respectively a first main bus tie disconnect switch fault-guided safety device 441 and a second main bus tie disconnect switch fault-guided safety device 442.

[0068] The main bus tie disconnect switch 9 is in the open state, and the closing action of the closing switch 61 is to be executed. The closing switch 61 is a manual switch or a remote control switch. If one side of the main bus tie disconnect switch 9 is not energized and the other side is energized, the output side 3 of the fault-guiding safety device 44 of the main bus tie disconnect switch on the unenergized side is in the on state, and the disconnect switch is closed successfully.

[0069] The main coupling disconnect switch 9 is in the open state, and the closing action of the closing switch 61 is to be executed. The closing switch 61 is a manual switch or a remote control switch. If both sides of the main coupling disconnect switch 9 are not energized, the output side 3 of the main coupling disconnect switch fault-guided safety device 44 on both sides is in the on state, and the disconnect switch is closed successfully.

[0070] The main bus tie disconnect switch 9 is in the open state, and the closing action of the closing switch 61 is to be executed. The closing switch 61 is a manual switch or a remote control switch. If both sides of the main bus tie disconnect switch 9 are energized, the output sides 3 of the main bus tie disconnect switch fault-guided safety device 44 on both sides are in the disconnected state, and the disconnect switch cannot be closed successfully.

[0071] The closing control circuit 6 includes a closing switch 61, a closing control coil 62 and a closing power supply 63. The closing control coil 62 is used to control the closing of the bus tie disconnect switch 9. Other products for controlling the closing of the bus tie disconnect switch 9 can also be used, such as an electric operating mechanism. The bus tie disconnect switch 9 is in an open state, and the closing action of the closing switch 61 is to be executed. The closing switch 61 is a manual switch or a remote control switch. If one side of the bus tie disconnect switch 9 is not energized and the other side is energized, the output side 3 of the fault-guiding safety device 44 of the bus tie disconnect switch on the unenergized side is in a conducting state, the closing control circuit is conducted, and the disconnect switch is successfully closed.

[0072] The main bus tie disconnect switch 9 is in the open state, and the closing action of the closing switch 61 is to be executed. The closing switch 61 is a manual switch or a remote control switch. If both sides of the main bus tie disconnect switch 9 are not energized, the output side 3 of the main bus tie disconnect switch fault-guided safety device 44 on both sides is in the on state, the closing control circuit is turned on, and the disconnect switch is closed successfully.

[0073] The main bus tie disconnect switch 9 is in the open state, and the closing action of the closing switch 61 is to be executed. The closing switch 61 is a manual switch or a remote control switch. If both sides of the main bus tie disconnect switch 9 are energized, the output sides 3 of the main bus tie disconnect switch fault-guided safety device 44 on both sides are in the disconnected state, the closing control circuit is not conductive, and the disconnect switch cannot be closed successfully.

[0074] Example 3: The busbar 8 has a busbar disconnect switch 9. Since the disconnect switch does not distinguish between the upper port and the lower port, it is necessary to install the first busbar disconnect switch fault-guiding safety device 441 and the second busbar disconnect switch fault-guiding safety device 442 on both sides of the busbar disconnect switch 9, and connect the A / B / C / N signals on both sides of the busbar disconnect switch 9 to the A / B / C / N terminals of the first busbar disconnect switch fault-guiding safety device 441 and the second busbar disconnect switch fault-guiding safety device 442. Then, the output sides 3 of the first busbar disconnect switch fault-guiding safety device 441 and the second busbar disconnect switch fault-guiding safety device 442 are first connected in parallel, and then connected in series to the closing control coil 62. If the bus tie disconnect switch 9 is in the open state and there is power on both sides of the bus tie disconnect switch 9 at the same time, the bus tie disconnect switch 9 cannot be closed successfully, thereby ensuring the power safety in this situation; if the bus tie disconnect switch 9 is in the open state and there is no power on one side of the bus tie disconnect switch 9, the bus tie disconnect switch 9 can be closed successfully.

[0075] Example 4

[0076] Figure 4 A schematic structural diagram of a multi-channel electricity safety system provided for Example 4 of the present invention; the multi-channel electricity safety system is powered by dual power supplies, the power supplies include a first AC power supply and a second AC power supply, the first AC power supply incoming line 71 and the second AC power supply incoming line 72 are connected through a bus 8, the first AC power supply incoming line 71 and the second AC power supply incoming line 72 are respectively provided with a first incoming line disconnect switch 51 and a second incoming line disconnect switch 52, and also includes a fault-guided safety device 4, and the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52 are both provided with a fault-guided safety device 4 at their lower ends.

[0077] The input sides of the two fault-oriented safety devices 4 are respectively arranged at the lower ends of the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52. The output sides 3 of the two fault-oriented safety devices 4 are connected in series to the closing control circuits corresponding to the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52. The closing control circuit includes a closing switch 61, a closing control coil 62 and a closing power supply 63. The closing control coil 62 is used to control the closing of the disconnect switch.

[0078] The fault-guiding safety devices 4 arranged at the lower ports of the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52 are respectively defined as a first incoming line disconnect switch fault-guiding safety device 41 and a second incoming line disconnect switch fault-guiding safety device 42.

[0079] The first incoming line disconnect switch 51 is in the open state, and the closing action of the closing switch 61 of the closing control circuit corresponding to the first incoming line disconnect switch 51 is to be executed. If the lower port of the first incoming line disconnect switch 51 is energized, the output side 3 of the first incoming line disconnect switch fault-guided safety device 41 is in the disconnected state, the closing control circuit corresponding to the first incoming line disconnect switch 51 is not conductive, the closing control coil 62 is not energized, and the first incoming line disconnect switch 51 cannot be closed successfully, thereby playing a role of fault-guided safety;

[0080] The first incoming line disconnect switch 51 is in the open state, and the closing action of the closing switch 61 corresponding to the closing control circuit of the first incoming line disconnect switch 51 is to be executed. If the lower port of the first incoming line disconnect switch 51 is not energized, the output side 3 of the first incoming line disconnect switch fault-guided safety device 41 is in the on state, the closing control circuit of the first incoming line disconnect switch 51 is turned on, the closing control coil 62 is energized, and the first incoming line disconnect switch 51 is closed successfully, and switched to the backup circuit to ensure continuous power supply;

[0081] Example 4: The lower ports of two mains disconnect switches, i.e., the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52, are respectively installed with the first incoming line disconnect switch fault guidance safety device 41 and the second incoming line disconnect switch fault guidance safety device 42. The two mains disconnect switches, i.e., the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52, are not allowed to be closed at the same time.

[0082] If the first mains power supply has power, after the first incoming line disconnect switch 51 is closed, the second mains power supply incoming line 72 has power, and the second incoming line disconnect switch 52 is in an open state, and the erroneous operation intends to execute the closing action of the closing switch 61 of the closing control circuit corresponding to the second incoming line disconnect switch 52, the first mains power supply incoming line 71 has power, and the second incoming line disconnect switch fault-guiding safety device 42 at the lower port of the second incoming line disconnect switch 52 detects that there is power at the lower port of the second incoming line disconnect switch 52, and the output side 3 of the second incoming line disconnect switch fault-guiding safety device 42 is in a disconnected state, the closing control circuit corresponding to the second incoming line disconnect switch 52 is not conductive, the closing control coil 62 is not energized, and the second incoming line disconnect switch 52 cannot be closed successfully, preventing the energized first mains power supply incoming line 71 and the energized second mains power supply incoming line 72 from being conductive, preventing accidents from occurring, thereby playing a role of fault-guiding safety;

[0083] Similarly, if the second mains power supply has power, after the second incoming line disconnect switch 51 is closed, the first mains power supply has power, the first incoming line disconnect switch 51 is in the open state, and the erroneous operation intends to execute the closing action of the closing switch 61 of the closing control circuit corresponding to the first incoming line disconnect switch 51, the second mains power incoming line 72 has power, the first incoming line disconnect switch fault-guiding safety device 41 detects that there is power at the lower port of the first incoming line disconnect switch 51, the output side 3 of the first incoming line disconnect switch fault-guiding safety device 41 is in the disconnected state, the closing control circuit corresponding to the first incoming line disconnect switch 51 is not conductive, the closing control coil 62 is not energized, and the first incoming line disconnect switch 51 cannot be closed successfully, preventing the energized first mains power incoming line 71 and the energized second mains power incoming line 72 from being conductive, preventing accidents from occurring, thereby playing a role of fault-guiding safety;

[0084] If the second mains power supply has no power, when the second incoming line disconnect switch 52 is in the disconnected state, the first mains power supply has power, the first incoming line disconnect switch 51 is in the disconnected state, and the closing action of the closing switch 61 of the closing control circuit corresponding to the first incoming line disconnect switch 51 is intended to be executed, the second mains power supply incoming line 72 has no power, the first incoming line disconnect switch fault-guiding safety device 41 detects that there is no power at the lower port of the first incoming line disconnect switch 51, the output side 3 of the first incoming line disconnect switch fault-guiding safety device 41 is in the on state, the closing control circuit corresponding to the first incoming line disconnect switch 51 is turned on, the closing control coil 62 is energized, the first incoming line disconnect switch 51 can be closed successfully, and switched to the first mains power supply incoming line 71 to ensure continuous power supply.

[0085] Similarly, if the first AC power supply has no power, when the first incoming line disconnect switch 51 is in the disconnected state, the second AC power supply has power, the second incoming line disconnect switch 52 is in the disconnected state, and the closing action of the closing switch 61 of the closing control circuit corresponding to the second incoming line disconnect switch 52 is intended to be executed, the first AC power incoming line 71 has no power, the second incoming line disconnect switch fault-guiding safety device 42 detects that there is no power at the lower port of the second incoming line disconnect switch 52, the output side 3 of the second incoming line disconnect switch fault-guiding safety device 42 is in the on state, the closing control circuit corresponding to the second incoming line disconnect switch 52 is turned on, the closing control coil 62 is energized, the second incoming line disconnect switch 52 can be closed successfully, and switched to the second AC power incoming line 72 to ensure continuous power supply.

[0086] Example 5

[0087] Figure 5A schematic structural diagram of a multi-circuit power safety system provided for Example 5 of the present invention; the multi-circuit power safety system adopts a dual power supply with a diesel generator for power supply, the power supply includes a first AC power supply, a second AC power supply, and a diesel generator, and the first AC power supply incoming line 71, the second AC power supply incoming line 72, and the diesel generator incoming line 73 are respectively provided with a first incoming line disconnect switch 51, a second incoming line disconnect switch 52, and a diesel generator incoming line disconnect switch 53, and also includes a fault-guided safety device 4, and the first incoming line disconnect switch 51, the second incoming line disconnect switch 52, and the diesel generator incoming line disconnect switch 53 are all provided with a fault-guided safety device 4 at their lower ends.

[0088] The input sides of the three fault-guided safety devices 4 are respectively arranged at the first incoming line disconnect switch 51, the second incoming line disconnect switch 52, and the lower end of the diesel generator incoming line 73. The output side 3 of the fault-guided safety device 4 is connected in series to the corresponding closing control circuit. The closing control circuit includes a closing switch 61, a closing control coil 62 and a closing power supply 63. The closing control coil 62 is used to control the closing of the disconnect switch.

[0089] The fault-guiding safety devices arranged at the lower ends of the first incoming line disconnect switch 51, the second incoming line disconnect switch 52, and the diesel generator incoming line disconnect switch 53 are respectively defined as the first incoming line disconnect switch fault-guiding safety device 41, the second incoming line disconnect switch fault-guiding safety device 42, and the diesel generator incoming line disconnect switch fault-guiding safety device 43.

[0090] Usage example 5: The first incoming line disconnect switch 51, the second incoming line disconnect switch 52, and the diesel generator incoming line disconnect switch 53 are respectively installed with the first incoming line disconnect switch fault-guiding safety device 41, the second incoming line disconnect switch fault-guiding safety device 42, and the diesel generator incoming line disconnect switch fault-guiding safety device 43 at their lower ends. The first incoming line disconnect switch 51, the second incoming line disconnect switch 52, and the diesel generator incoming line disconnect switch 53 are not allowed to be closed at the same time. If the first mains power supply has power, after the first incoming line disconnect switch 51 is closed, since the second incoming line disconnect switch 52 and the diesel generator incoming line disconnect switch 53 have power, the second incoming line disconnect switch fault-guiding safety device 42 and the diesel generator incoming line disconnect switch fault-guiding safety device 43 detect that the second incoming line disconnect switch 52 and the diesel generator incoming line disconnect switch 53 have power, and the corresponding output side 3 of the second incoming line disconnect switch fault-guiding safety device 42 and the diesel generator incoming line disconnect switch fault-guiding safety device 43 is in a disconnected state, the corresponding closing control circuits of the second incoming line disconnect switch 52 and the diesel generator incoming line disconnect switch 53 are not conductive, the closing control coil 62 is not energized, and the second incoming line disconnect switch 52 and the diesel generator incoming line disconnect switch 53 cannot be closed successfully, thereby preventing accidents from occurring, thereby playing a role in fault-guiding safety;

[0091] Similarly, if the second mains power supply has power, when the second incoming line disconnect switch 52 is closed, since there is power at the lower ports of the first incoming line disconnect switch 51 and the diesel generator incoming line disconnect switch 53, the first incoming line disconnect switch fault-guiding safety device 41 and the diesel generator incoming line disconnect switch fault-guiding safety device 43 detect that there is power at the lower ports of the first incoming line disconnect switch 51 and the diesel generator incoming line disconnect switch 53, and the output side 3 of the first incoming line disconnect switch fault-guiding safety device 41 and the diesel generator incoming line disconnect switch fault-guiding safety device 43 is in a disconnected state, and the corresponding closing control circuits of the first incoming line disconnect switch 51 and the diesel generator incoming line disconnect switch 53 are not conductive, and the closing control coil 62 is not energized, so the first incoming line disconnect switch 51 and the diesel generator incoming line disconnect switch 53 cannot be closed, thereby playing a role of fault-guiding safety;

[0092] Similarly, if there is electricity in the diesel generator incoming line 73, when the diesel generator incoming line disconnect switch 53 is closed, since there is electricity at the lower ports of the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52, the first incoming line disconnect switch fault-guiding safety device 41 and the second incoming line disconnect switch fault-guiding safety device 42 detect that there is electricity at the lower ports of the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52, and the output side 3 of the first incoming line disconnect switch fault-guiding safety device 41 and the second incoming line disconnect switch fault-guiding safety device 42 is in a disconnected state, and the corresponding closing control circuits of the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52 are not conductive, and the closing control coil 62 is not energized. Therefore, the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52 cannot be closed, thereby playing a role of fault-guiding safety.

[0093] Example 6

[0094] Figure 6 A schematic structural diagram of a multi-circuit power safety system provided for Example 6 of the present invention; the multi-circuit power safety system adopts a two-incoming line and one bus-tie structure, the power supply includes a first AC power supply and a second AC power supply, the first AC power supply incoming line 71 and the second AC power supply incoming line 72 are respectively provided with a first incoming line disconnect switch 51 and a second incoming line disconnect switch 52, the first AC power supply incoming line 71 and the second AC power supply incoming line 72 are connected through a bus 8, the bus 8 is provided with a bus-tie disconnect switch 9, and also includes a fault-guided safety device 4, the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52 are both provided with a fault-guided safety device 4 at their lower ends, and fault-guided safety devices 4 are respectively provided on both sides of the bus-tie disconnect switch 9.

[0095] The input sides of the two fault-oriented safety devices 4 are respectively arranged at the lower ports of the first incoming line disconnecting switch 51 and the second incoming line disconnecting switch 52, and the output sides 3 of the fault-oriented safety devices 4 corresponding to the first incoming line disconnecting switch 51 and the second incoming line disconnecting switch 52 are connected in series to the closing control lines corresponding to the first incoming line disconnecting switch 51 and the second incoming line disconnecting switch 52; the input sides of the other two fault-oriented safety devices 4 are respectively arranged at both sides of the bus tie disconnecting switch 9, and the output sides 3 of the fault-oriented safety devices 4 at both sides of the bus tie disconnecting switch 9 are connected in parallel and then connected in series to the closing control lines corresponding to the bus tie disconnecting switch 9;

[0096] The fault-guiding safety devices 4 arranged at the lower ports of the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52 are respectively defined as a first incoming line disconnect switch fault-guiding safety device 41 and a second incoming line disconnect switch fault-guiding safety device 42.

[0097] The fault-guided safety devices 4 arranged on both sides of the main bus tie disconnect switch 9 are defined as main bus tie disconnect switch fault-guided safety devices 44. The two main bus tie disconnect switch fault-guided safety devices 44 are respectively a first main bus tie disconnect switch fault-guided safety device 441 and a second main bus tie disconnect switch fault-guided safety device 442.

[0098] The closing control circuit includes a closing switch 61, a closing control coil 62 and a closing power supply 63. The closing control coil 62 is used to control the closing of the disconnect switch.

[0099] Usage example 6: The first incoming line disconnect switch 51, the second incoming line disconnect switch 52 and both sides of the bus tie disconnect switch 9 are respectively installed with the first incoming line disconnect switch fault-guiding safety device 41, the second incoming line disconnect switch fault-guiding safety device 42, the first bus tie disconnect switch fault-guiding safety device 441 and the second bus tie disconnect switch fault-guiding safety device 442. The first incoming line disconnect switch 51, the second incoming line disconnect switch 52 and the bus tie disconnect switch 9 are not allowed to be closed at the same time, and a maximum of two disconnect switches are allowed to be closed.

[0100] If the first mains power supply has power and the first incoming line disconnect switch 51 is in the closed state, and the second mains power supply has power and the second incoming line disconnect switch 52 is in the closed state, then because there is power on both sides of the bus tie disconnect switch 9, the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 and the second bus tie disconnect switch fault-guided safety device 442 is in the disconnected state, the closing control circuit corresponding to the bus tie disconnect switch 9 is not conductive, and the closing control coil 62 is not energized, so the bus tie disconnect switch 9 cannot be closed, thereby playing a role of fault-guided safety.

[0101] If the first mains power supply has power and the first incoming line disconnect switch 51 is in the closed state, the second mains power supply has no power and the second incoming line disconnect switch 52 is in the open state, there is power on the first incoming line disconnect switch 51 side of the bus tie disconnect switch 9 and no power on the second incoming line disconnect switch 52 side, the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 is in the disconnected state, and the output side 3 of the second bus tie disconnect switch fault-guided safety device 442 is in the on state, the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 and the output side 3 of the second bus tie disconnect switch fault-guided safety device 442 are connected in parallel and then in series to the closing control line corresponding to the bus tie disconnect switch 9, the bus tie disconnect switch 9 can be closed, and after the bus tie disconnect switch 9 is closed, if the second mains power supply is powered, the second incoming line disconnect switch 52 cannot be closed because there is power at the lower port of the second incoming line disconnect switch 52, thereby playing a role of fault-guided safety. In this case, the busbar disconnect switch 9 can be opened first, and then the second incoming line disconnect switch 52 can be closed because there is no electricity at the lower port of the second incoming line disconnect switch 52.

[0102] Similarly, if the second mains power supply has power and the second incoming line disconnect switch 52 is in the closed state, the first mains power supply has no power and the first incoming line disconnect switch 51 is in the open state, there is power on the second incoming line disconnect switch 52 side of the bus tie disconnect switch 9, and there is no power on the first incoming line disconnect switch 51 side, the output side 3 of the second bus tie disconnect switch fault-guided safety device 442 is in the disconnected state, and the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 is in the on state, the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 and the output side 3 of the second bus tie disconnect switch fault-guided safety device 442 are connected in parallel and then in series to the closing control line corresponding to the bus tie disconnect switch 9, the bus tie disconnect switch 9 can be closed, and after the bus tie disconnect switch 9 is closed, if the first mains power supply is powered, the first incoming line disconnect switch 51 cannot be closed because there is power at the lower port of the first incoming line disconnect switch 51, thereby playing a role of fault-guided safety. In this case, the busbar disconnect switch 9 can be opened first, and then the first incoming line disconnect switch 51 can be closed because there is no electricity at the lower port of the first incoming line disconnect switch 51.

[0103] Example 7

[0104] Figure 7A schematic diagram of the structure of a multi-circuit power safety system provided in Example 7 of the present invention; a multi-circuit power safety system, which adopts a two-incoming line and one busbar with a diesel generator, wherein the power supplies include a first AC power supply, a second AC power supply, and a diesel generator, and the first AC power supply incoming line 71, the second AC power supply incoming line 72, and the diesel generator incoming line 73 are respectively provided with a first incoming line disconnect switch 51, a second incoming line disconnect switch 52, and a diesel generator incoming line disconnect switch 53, and the first incoming line disconnect switch 51, the second incoming line disconnect switch 52, and the diesel generator incoming line disconnect switch 53 are all provided with a fault-guided safety device 4 at their lower ends, the first AC power supply incoming line 71, the second AC power supply incoming line 72, and the diesel generator incoming line 73 are connected via a busbar 8, the busbar 8 is provided with a busbar disconnect switch 9, and the busbar disconnect switches 9 are respectively provided with a fault-guided safety device 4.

[0105] The output side 3 of the fault-guided safety device 4 is connected in series to the corresponding closing control circuit. The closing control circuit includes a closing switch 61, a closing control coil 62 and a closing power supply 63. The closing control coil 62 is used to control the closing of the disconnect switch.

[0106] The fault-guiding safety devices 4 arranged at the lower ends of the first incoming line disconnect switch 51, the second incoming line disconnect switch 52, and the diesel generator incoming line disconnect switch 53 are respectively defined as the first incoming line disconnect switch fault-guiding safety device 41, the second incoming line disconnect switch fault-guiding safety device 42, and the diesel generator incoming line disconnect switch fault-guiding safety device 43.

[0107] The fault-guiding safety devices 4 arranged on both sides of the bus tie disconnect switch 9 are defined as bus tie disconnect switch fault-guiding safety devices 44, and the bus tie disconnect switch fault-guiding safety devices 44 are respectively a first bus tie disconnect switch fault-guiding safety device 441 and a second bus tie disconnect switch fault-guiding safety device 442.

[0108] Usage example 7: The first incoming line disconnect switch 51, the second incoming line disconnect switch 52, the diesel generator incoming line disconnect switch 53, and both sides of the busbar disconnect switch 9 are installed with the first incoming line disconnect switch fault-guiding safety device 41, the second incoming line disconnect switch fault-guiding safety device 42, the diesel generator incoming line disconnect switch fault-guiding safety device 43, the first busbar disconnect switch fault-guiding safety device 441, and the second busbar disconnect switch fault-guiding safety device 442. The first incoming line disconnect switch 51, the second incoming line disconnect switch 52, the diesel generator incoming line disconnect switch 53, and the busbar disconnect switch 9 can close at most two disconnect switches.

[0109] If the first mains power supply has power and the first incoming line disconnect switch 51 is in the closed state, and the second mains power supply has power and the second incoming line disconnect switch 52 is in the closed state, then because there is power on both sides of the bus tie disconnect switch 9, the bus tie disconnect switch 9 cannot be closed. At the same time, because there is power at the lower port of the diesel generator incoming line disconnect switch 53, the diesel generator incoming line disconnect switch 53 cannot be closed, thereby playing a role of fault-guided safety.

[0110] If the first mains power supply has power and the first incoming line disconnect switch 51 is in the closed state, the second mains power supply has no power and the second incoming line disconnect switch 52 is in the open state, the diesel generator (standby generator) has no power and the diesel generator incoming line disconnect switch 53 is in the open state, the bus tie disconnect switch 9 can be closed because only one side has power. After the bus tie disconnect switch 9 is closed, if the second mains power supply is powered, the second incoming line disconnect switch 52 cannot be closed because the second incoming line disconnect switch 52 has power at the lower port, thereby playing a role in fault-oriented safety. In this case, the bus tie disconnect switch 9 can be opened first, and then the second incoming line disconnect switch 52 can be closed because there is no power at the lower port.

[0111] If the first mains power supply has power and the first incoming line disconnect switch 51 is in the closed state, the second mains power supply has no power and the second incoming line disconnect switch 52 is in the open state, the diesel generator (standby generator) has power and the diesel generator incoming line disconnect switch 53 is in the closed state, then because both sides of the bus tie disconnect switch 9 have power, the bus tie disconnect switch 9 cannot be closed, and at the same time, because the diesel generator incoming line disconnect switch 53 has power at the lower port and the second incoming line disconnect switch 52 has power at the lower port, the second incoming line disconnect switch 52 cannot be closed, thereby playing a role in fault-guided safety. In this case, if the second mains power supply is on and the diesel generator incoming line disconnect switch 53 is opened first, then because the second incoming line disconnect switch 52 has no power at the lower port, the second incoming line disconnect switch 52 can be closed.

[0112] If the second mains power supply has power and the second incoming line disconnect switch 52 is in the closed state, the first mains power supply has no power and the first incoming line disconnect switch 51 is in the open state, the bus tie disconnect switch 9 can be closed because only one side has power. After the bus tie disconnect switch 9 is closed, if the first mains power supply is powered, the first incoming line disconnect switch 5 cannot be closed because there is power at the lower port, thereby playing a role in fault-oriented safety. At the same time, since there is power at the lower port of the diesel generator incoming line disconnect switch 53, the diesel generator incoming line disconnect switch 53 cannot be closed, thereby playing a role in fault-oriented safety. In this case, the bus tie disconnect switch 9 can be opened first, and then since there is no power at the lower port of the first incoming line disconnect switch 51, the first incoming line disconnect switch 51 can be closed.

[0113] If both the first and second mains power supplies lose power, and the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52 are both opened, the diesel generator is in the starting state, and the diesel generator incoming line disconnect switch 53 is in the closed state, and the busbar disconnect switch 9 is in the open state. If the second mains power supply is powered, the second incoming line disconnect switch 52 cannot be closed because there is power at the lower port of the second incoming line disconnect switch 52; when the first mains power supply is powered, the lack of power at the lower port of the first incoming line disconnect switch 51 does not affect the normal closing of the first incoming line disconnect switch 51.

[0114] If both the first mains power supply and the second mains power supply lose power, and the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52 are both opened, the diesel generator is in the starting state, and the diesel generator incoming line disconnect switch 53 is in the closed state, the bus coupler disconnect switch 9 can be closed because only one side has power. After the bus coupler disconnect switch 9 is closed, if the second mains power supply is powered, the second incoming line disconnect switch 52 cannot be closed because there is power at the lower port of the second incoming line disconnect switch 52; when the first mains power supply is powered, the first incoming line disconnect switch 51 cannot be closed if there is power at the lower port of the first incoming line disconnect switch 51.

[0115] Example 8

[0116] Figure 8 This is a schematic diagram of the structure of the standby automatic interlocking control system provided in Example 8 of the present invention. A self-closing interlocking control system is used for a low-voltage distribution network, including a power supply, the power supply including a first mains power supply and a second mains power supply, a first incoming line disconnecting switch 51 and a second incoming line disconnecting switch 52 are respectively arranged on the first mains power incoming line 71 and the second mains power incoming line 72, the first mains power incoming line 71 and the second mains power incoming line 72 are connected through a busbar 8, a busbar 8 is provided with a busbar disconnecting switch 9, the first incoming line disconnecting switch 51, the second incoming line disconnecting switch 52, and the busbar disconnecting switch 9 are provided with electrical interlocking devices 10 corresponding to the closing control circuits, which are respectively a first incoming line disconnecting switch electrical interlocking device 101, a second incoming line disconnecting switch electrical interlocking device 102, and a busbar disconnecting switch electrical interlocking device 103, and also includes a fault-guided safety device 4, the first incoming line disconnecting switch 51 and the second incoming line disconnecting switch 52 are both provided with a fault-guided safety device 4 at their lower ports, and the fault-guided safety devices 4 are respectively arranged on both sides of the busbar disconnecting switch 9;

[0117] The fault-guiding safety devices 4 arranged at the lower ports of the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52 are defined as a first incoming line disconnect switch fault-guiding safety device 41 and a second incoming line disconnect switch fault-guiding safety device 42, respectively.

[0118] The fault-guiding safety devices 4 arranged on both sides of the bus tie disconnect switch 9 are defined as bus tie disconnect switch fault-guiding safety devices 44, and the bus tie disconnect switch fault-guiding safety devices 44 are respectively a first bus tie disconnect switch fault-guiding safety device 441 and a second bus tie disconnect switch fault-guiding safety device 442.

[0119] The first incoming line disconnect switch electrical interlocking device 101 includes the auxiliary contacts of the second incoming line disconnect switch 52 and the auxiliary contacts of the bus tie disconnect switch 9 in parallel, the second incoming line disconnect switch electrical interlocking device 102 includes the auxiliary contacts of the first incoming line disconnect switch 51 and the auxiliary contacts of the bus tie disconnect switch 9 in parallel, and the bus tie disconnect switch electrical interlocking device 103 includes the auxiliary contacts of the first incoming line disconnect switch 51 and the auxiliary contacts of the second incoming line disconnect switch 52 in parallel. The state of the auxiliary contacts is opposite to that of the disconnect switch, that is, the state of the auxiliary contacts is open when the disconnect switch is closed, and the state of the auxiliary contacts is closed when the disconnect switch is open. For example, when the second incoming line disconnect switch 52 is closed, the state of the auxiliary contacts of the second incoming line disconnect switch 52 is open.

[0120] The input sides 2 of the first incoming line disconnect switch fault-guiding safety device 41 and the second incoming line disconnect switch fault-guiding safety device 42 are respectively arranged at the lower ends of the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52; the output sides 3 of the first incoming line disconnect switch fault-guiding safety device 41 and the second incoming line disconnect switch fault-guiding safety device 42 are connected in series on the closing control circuits corresponding to the first incoming line disconnect switch 51 and the second incoming line disconnect switch 52.

[0121] The input sides 2 of the first bus tie disconnect switch fault-guiding safety device 441 and the second bus tie disconnect switch fault-guiding safety device 442 are arranged on both sides of the bus tie disconnect switch 9, and the output sides 3 of the first bus tie disconnect switch fault-guiding safety device 441 and the second bus tie disconnect switch fault-guiding safety device 442 are connected in parallel and then in series to the closing control circuit 6 corresponding to the bus tie disconnect switch 9.

[0122] The closing control circuit includes an electrical interlocking device 10, a closing switch 61, a closing control coil 62 and a closing power supply 63. The closing control coil 62 is used to control the closing of the disconnect switch.

[0123] Example 8: Figure 8The figure shows a closing control system of a two-incoming-one-busbar standby automatic switching mode, in which a fault-guided safety device 4 is arranged in a conventional electrical interlocking circuit, that is, a fault-guided safety device 4 is arranged in a closing control circuit in which an electrical interlocking device is arranged, thereby improving the safety of closing. Conventional standby automatic switching electrical interlocking is achieved through interlocking between disconnecting switches, in which the auxiliary contacts of the other two disconnecting switches are arranged in the closing control line of each disconnecting switch of the two-incoming-one-busbar, that is, the auxiliary contacts of the other two disconnecting switches are arranged in parallel first and then in series in the closing control line of each disconnecting switch; the state of the auxiliary contact is opposite to that of the disconnecting switch, that is, the state of the auxiliary contact is open when the disconnecting switch is closed, and the state of the auxiliary contact is closed when the disconnecting switch is opened. Since there is an interlocking relationship between the auxiliary contacts of the first incoming line disconnect switch 51, the second incoming line disconnect switch 52, and the busbar disconnect switch 9, at most two disconnect switches are allowed to be closed. However, this method has high requirements on the auxiliary contacts and the connection lines. When the connection line output is abnormal or the auxiliary contacts are damaged, the electrical interlock may fail. Therefore, after adding the fault-guided safety device 4, the safety of closing can be guaranteed when the auxiliary contacts of the traditional electrical interlock fail, thereby improving the safety of electricity use. The details are as follows:

[0124] Fault-guided safety devices 4 are installed on the first incoming line disconnect switch 51, the lower end of the second incoming line disconnect switch 52, and both sides of the busbar disconnect switch 9. The three disconnect switches are not allowed to be closed at the same time, and a maximum of two disconnect switches are allowed to be closed.

[0125] If the first mains power supply has power and the first incoming line disconnect switch 51 is in the closed state, and the second mains power supply has power and the second incoming line disconnect switch 52 is in the closed state, then because there is power on both sides of the bus tie disconnect switch 9, the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 and the second bus tie disconnect switch fault-guided safety device 442 is in the disconnected state, the closing control circuit corresponding to the bus tie disconnect switch 9 is not conductive, and the closing control coil 62 is not energized, so the bus tie disconnect switch 9 cannot be closed, thereby playing a role of fault-guided safety.

[0126] If the first mains power supply has power and the first incoming line disconnect switch 51 is in the closed state, the second mains power supply has no power and the second incoming line disconnect switch 52 is in the open state, there is power on the first incoming line disconnect switch 51 side of the bus tie disconnect switch 9 and no power on the second incoming line disconnect switch 52 side, the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 is in the disconnected state, and the output side 3 of the second bus tie disconnect switch fault-guided safety device 442 is in the on state, the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 and the output side 3 of the second bus tie disconnect switch fault-guided safety device 442 are connected in parallel and then in series to the closing control line corresponding to the bus tie disconnect switch 9, and the bus tie disconnect switch 9 can be closed; after the bus tie disconnect switch 9 is closed, if the second mains power supply is powered, the second incoming line disconnect switch 52 cannot be closed because there is power at the lower port of the second incoming line disconnect switch 52, thereby playing a role of fault-guided safety. In this case, the busbar disconnect switch 9 can be opened first, and then the second incoming line disconnect switch 52 can be closed because there is no electricity at the lower port of the second incoming line disconnect switch 52.

[0127] Similarly, if the second mains power supply has power and the second incoming line disconnect switch 52 is in the closed state, the first mains power supply has no power and the first incoming line disconnect switch 51 is in the open state, there is power on the second incoming line disconnect switch 52 side of the bus tie disconnect switch 9, and there is no power on the first incoming line disconnect switch 51 side, the output side 3 of the second bus tie disconnect switch fault-guided safety device 442 is in the disconnected state, and the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 is in the on state, the output side 3 of the first bus tie disconnect switch fault-guided safety device 441 and the output side 3 of the second bus tie disconnect switch fault-guided safety device 442 are connected in parallel and then in series to the closing control line corresponding to the bus tie disconnect switch 9, and the bus tie disconnect switch 9 can be closed; after the bus tie disconnect switch 9 is closed, if the first mains power supply is powered, the first incoming line disconnect switch 51 cannot be closed because there is power at the lower port of the first incoming line disconnect switch 51, thereby playing a role in fault-guided safety. In this case, the busbar disconnect switch 9 can be opened first, and then the first incoming line disconnect switch 51 can be closed because there is no electricity at the lower port of the first incoming line disconnect switch 51.

[0128] Example 9

[0129] The fault-guided safety device 4 is applied to a single-phase electrical circuit, and comprises a switch part 1, wherein the two sides of the switch part 1 are an input side 2 and an output side 3 respectively. The switch part 1 is in a disconnected state when energized; and in a conducting state when not energized.

[0130] The switching unit 1 includes a switching unit 11, which is a normally closed relay or contactor;

[0131] The input side includes two single-phase terminals, L and N; the output side includes a first output terminal and a second output terminal.

[0132] There is no electricity between the input side terminals 2, the first output terminal 31 and the second output terminal 32 are in a conducting connection state, and the fault-guided safety device 4 is in a conducting state.

[0133] The L and N terminals of the input side 2 are energized, the first outlet terminal 31 and the second outlet terminal 32 are in a disconnected state, and the fault-directed safety device 4 is in a disconnected state. That is, the L and N terminals are energized, the on-off unit 11 is disconnected, and then the first outlet terminal 31 and the second outlet terminal 32 are in a disconnected state, and the fault-directed safety device 4 is in a disconnected state.

[0134] Example 1: The on-off unit 11 is composed of a normally closed relay, with four terminals L and N on the input side 2, and a first output terminal 31 and a second output terminal 32 on the output side 3. There is no power between the two terminals L and N on the input side 2, and the first output terminal 31 and the second output terminal 32 are in a conducting connection state; there is power between the two terminals L and N on the input side 2, and the first output terminal 31 and the second output terminal 32 are in a disconnected state.

[0135] Example 10

[0136] The disconnecting switch in Examples 1-9 is a component with on-off functions, such as a contactor, a relay, a circuit breaker, a compound switch, etc.

[0137] Embodiment 11

[0138] The relays in Examples 1-10 may be replaced by other elements with on-off functions, such as contactors.

[0139] Example 12

[0140] The closing control circuit in Examples 1-11 can be replaced by other control circuits having functions of controlling a disconnect switch, a contactor, or a relay. Other products for controlling the closing of a disconnect switch, such as an electric operating mechanism, can also be used.

[0141] Embodiment 13

[0142] The fault-guided safety device 4 can also be used in other power systems, such as high-voltage power distribution systems or other power conditions.

[0143] The fault-guided safety device, electric safety system, multi-channel electric safety system and standby automatic interlocking control system provided by the present invention have improved the traditional standby automatic interlocking mechanism and added a fault-guided safety device. If there is power in any two of the three phases A, B and C in the circuit at the bottom of the disconnect switch, the interlocking control system is in a disconnected state and the control closing signal cannot be turned on. Even if the traditional interlocking mechanism fails, the safety of electricity use can be guaranteed.

[0144] The automatic switching interlocking control device provided by the present invention improves the traditional automatic switching interlocking mechanism and adds a fault-guided safety device 4. If any two of the three phases A, B, and C in the circuit of the disconnecting switch bottom port are energized, the fault-guided safety device 4 is in a disconnected state, and the control closing signal cannot be turned on. The automatic switching interlocking control device provided by the present invention can detect the energization status of the lower port of the incoming line switch when the automatic switching device is automatically switched on, so as to avoid the situation where a short circuit or explosion occurs after switching when the traditional automatic switching interlocking mechanism fails, which not only protects property and personal safety, but also brings great economic benefits.

[0145] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. Failure-guided safety device, characterized in that It comprises a switching part, and two sides of the switching part are respectively an input side and an output side; The input side of the switching unit is energized, the output side of the switching unit is in a disconnected state, and the fault-guided safety device is in a disconnected state; The input side of the switch unit is not energized, the output side of the switch unit is in a conducting state, and the fault-guided safety device is in a conducting state; The switching part includes three switching units connected in series; The input side includes four terminals: A, B, C, and N; the output side includes the first output terminal and the second output terminal; There is no power between any two terminals A, B, C, and N on the input side, the first output terminal and the second output terminal are in a conducting connection state, and the fault-guided safety device is in a conducting state; There is power between any two terminals A, B, C, and N on the input side, the first output terminal and the second output terminal are in the disconnected state, and the fault-guided safety device is in the disconnected state.

2. An electric safety system having the fault-guided safety device according to claim 1, comprising an incoming line circuit, wherein a disconnect switch is arranged on the incoming line circuit, characterized in that It also includes a fault-guiding safety device, which is arranged at the lower port of the disconnect switch.

3. The power safety system according to claim 2, characterized in that The input side of the fault-guided safety device is arranged at the lower port of the disconnect switch, and the output side of the fault-guided safety device is connected in series to the closing control circuit; Furthermore, the closing control circuit includes a closing switch, a closing control coil and a closing power supply, and the closing control coil is used to control the closing of the disconnect switch.

4. An electric safety system having the fault-guided safety device according to claim 1, comprising a busbar, wherein the busbar is provided with a busbar disconnect switch, characterized in that It also includes a fault-guided safety device, which is respectively arranged on both sides of the busbar disconnect switch; Furthermore, the input sides of the two fault-oriented safety devices are arranged on both sides of the bus tie disconnect switch, and the output sides of the fault-oriented safety devices are connected in parallel and then in series to the closing control circuit of the bus tie disconnect switch; Furthermore, the closing control circuit includes a closing switch, a closing control coil and a closing power supply, and the closing control coil is used to control the closing of the busbar disconnect switch.

5. A multi-circuit power safety system having the fault-guided safety device of claim 1, comprising a power supply, wherein the power supply comprises a first mains power supply and a second mains power supply, and a first incoming line disconnect switch and a second incoming line disconnect switch are respectively arranged on the incoming lines of the first mains power supply and the second mains power supply, characterized in that It also includes a fault-guiding safety device, and the first incoming line disconnect switch and the second incoming line disconnect switch are both provided with the fault-guiding safety device at their lower ports; Furthermore, the input sides of the two fault-guided safety devices are respectively arranged at the lower ports of the first incoming line disconnect switch and the second incoming line disconnect switch, and the output sides of the two fault-guided safety devices are respectively connected in series to the closing control circuits corresponding to the first incoming line disconnect switch and the second incoming line disconnect switch.

6. A multi-circuit power safety system having the fault-guided safety device of claim 1, comprising a power supply, wherein the power supply comprises a first mains power supply, a second mains power supply, and a diesel generator, wherein a first incoming line disconnect switch, a second incoming line disconnect switch, and a diesel generator incoming line disconnect switch are respectively arranged on the first mains power supply, the second mains power supply, and the diesel generator incoming line, wherein the first mains power supply, the second mains power supply, and the diesel generator incoming line are respectively provided with a first incoming line disconnect switch, a second incoming line disconnect switch, and a diesel generator incoming line disconnect switch ... mains power supply, a second It also includes a fault-guiding safety device, and the first incoming line disconnect switch, the second incoming line disconnect switch, and the lower port of the diesel generator incoming line disconnect switch are all provided with the fault-guiding safety device; Furthermore, the input sides of the three fault-guided safety devices are respectively arranged at the lower ends of the first incoming line disconnect switch, the second incoming line disconnect switch, and the diesel generator incoming line disconnect switch, and the output sides of the fault-guided safety devices are connected in series to the closing control circuits corresponding to the first incoming line disconnect switch, the second incoming line disconnect switch, and the diesel generator incoming line disconnect switch.

7. A multi-channel power safety system having the fault-guided safety device according to claim 1, wherein the power supply comprises a first mains power supply and a second mains power supply, wherein a first incoming line disconnect switch and a second incoming line disconnect switch are respectively arranged on the incoming lines of the first mains power supply and the second mains power supply, wherein the incoming lines of the first mains power supply and the second mains power supply are connected through a busbar, wherein a busbar is provided with a busbar disconnect switch, and further comprising a fault-guided safety device, wherein the first incoming line disconnect switch and the second incoming line disconnect switch are respectively provided with the fault-guided safety device at their lower ports, and the fault-guided safety device is respectively arranged on both sides of the busbar disconnect switch; Furthermore, the two input sides of the fault-guided safety device are respectively arranged at the lower ports of the first incoming line disconnect switch and the second incoming line disconnect switch, and the output side of the fault-guided safety device is connected in series to the closing control circuits corresponding to the first incoming line disconnect switch and the second incoming line disconnect switch; Furthermore, the input sides of the two fault-oriented safety devices are arranged on both sides of the bus tie disconnect switch, and the output sides of the fault-oriented safety devices are connected in parallel and then in series to the closing control circuit of the bus tie disconnect switch.

8. A multi-circuit power safety system having the fault-guided safety device of claim 1, comprising a power supply, wherein the power supply comprises a first mains power supply, a second mains power supply, and a diesel generator, wherein a first incoming line disconnect switch, a second incoming line disconnect switch, and a diesel generator incoming line disconnect switch are respectively provided on the first mains power supply, the second mains power supply, and the diesel generator incoming line, wherein the first mains power supply, the second mains power supply, and the diesel generator incoming line are respectively provided with a first incoming line disconnect switch, a second incoming line disconnect switch, and a diesel generator incoming line disconnect switch, wherein the first mains power supply, the second mains power supply, and the diesel generator incoming line are respectively provided with a first incoming line disconnect switch, The first incoming line disconnect switch, the second incoming line disconnect switch, and the lower port of the diesel generator incoming line disconnect switch are all provided with the fault-guided safety device, the first mains power supply, the second mains power supply, and the diesel generator incoming line are connected through a busbar, the busbar is provided with a busbar disconnect switch, and the busbar disconnect switches are respectively provided with the fault-guided safety device; Furthermore, the input sides of the three fault-oriented safety devices are respectively arranged at the first incoming line disconnect switch, the second incoming line disconnect switch, and the lower port of the diesel generator incoming line disconnect switch, and the output side of the fault-oriented safety device is connected in series to the closing control circuits corresponding to the first incoming line disconnect switch, the second incoming line disconnect switch, and the diesel generator incoming line disconnect switch; Furthermore, the input sides of two fault-guided safety devices are arranged on both sides of the bus tie disconnect switch, and the output sides of the fault-guided safety devices are connected in parallel and then in series to the closing control circuit of the bus tie disconnect switch.

9. A standby automatic interlocking control system with the fault-guided safety device of claim 1, used in a low-voltage distribution network, comprising a power supply, wherein the power supply comprises a first mains power supply and a second mains power supply, wherein a first incoming line disconnect switch and a second incoming line disconnect switch are respectively arranged on the incoming lines of the first mains power supply and the second mains power supply, wherein the incoming lines of the first mains power supply and the second mains power supply are connected via a bus, wherein a bus-tie disconnect switch is arranged on the bus, and electrical interlocking devices are arranged on the corresponding closing control lines of the first incoming line disconnect switch, the second incoming line disconnect switch and the bus-tie disconnect switch, wherein It also includes a fault-guiding safety device, the first incoming line disconnecting switch and the second incoming line disconnecting switch are both provided with the fault-guiding safety device at their lower ports, and the fault-guiding safety device is respectively provided at both sides of the bus tie disconnecting switch; Further, the two input sides of the fault-oriented safety devices are respectively arranged at the lower ports of the first incoming line disconnect switch and the second incoming line disconnect switch, and the output side of the fault-oriented safety device is connected in series to the closing control circuits corresponding to the first incoming line disconnect switch and the second incoming line disconnect switch. Further, the two input sides of the fault-oriented safety devices are arranged on both sides of the bus tie disconnect switch, and the output side of the fault-oriented safety device is connected in parallel and then in series to the closing control circuit of the bus tie disconnect switch.

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