A high-voltage circuit breaker energy storage test device

Abstract

The present invention provides a high-voltage circuit breaker energy storage test device, which belongs to the field of high-voltage circuit breaker detection technology. It includes a power supply circuit and a control circuit. The power supply circuit is connected to the power supply terminal through an energy storage contactor. The power supply terminal is used to connect the energy storage motor of the circuit breaker to be tested; each power supply terminal is correspondingly provided with a control circuit to realize the control of the energy storage motor, and each control circuit includes a first pole, a second pole, and a conversion switch. The moving contact of the conversion switch is connected to the first pole, the automatic end is connected to the second pole through the normally open contact of the limit relay and the coil of the corresponding energy storage contactor, and the manual end is connected to the second pole through the self-resetting switch and the coil of the corresponding energy storage contactor; the coil of the limit relay and the limit port of the energy storage limit switch for connecting the circuit breaker to be tested are connected in series between the first pole and the second pole. The high-voltage circuit breaker energy storage test device of the present invention is used to control the energy storage process and independently detect the performance of the energy storage mechanism.

Description

Technical Field

[0001] The invention relates to a high-voltage circuit breaker energy storage test device, belonging to the technical field of high-voltage circuit breaker detection. Background Art

[0002] Currently, the main operating mechanisms used in high-voltage circuit breakers in the domestic high-voltage electrical equipment industry above 110 kV include hydraulic, spring, and hydraulic disc spring mechanisms. The energy storage principle of a high-voltage circuit breaker involves using a storage motor to compress and store energy in the operating mechanism's storage spring or helium or nitrogen tank. After energy storage is completed, when the circuit breaker needs to be opened or closed, the circuit breaker's opening and closing coils are used to operate the circuit breaker. During the opening and closing operations of the high-voltage circuit breaker, energy storage must be continuously circulated.

[0003] Currently, domestic high-voltage circuit breaker energy storage test equipment is designed based on the operating principle of circuit breakers. The energy storage circuit is relatively simple, has a single function, and features few protective devices. Different high-voltage switchgear manufacturers design different energy storage devices. The energy storage circuit power supply for high-voltage circuit breaker energy storage test equipment primarily includes motor power, control power, and signal power. Typically, the motor power supply ranges from 110V to 380V DC / AC, and the control circuit power supply ranges from 110V to 220V DC / AC. During factory testing, the high voltages create numerous wiring hazards. Failures can easily burn components and, in severe cases, cause internal damage to the mechanism. Currently, market demand in the high-voltage switchgear industry is rapidly evolving, and customer requirements are rising year by year. High-voltage switchgear manufacturers are also rapidly upgrading their circuit breaker operating mechanisms. Existing circuit breaker mechanisms are categorized by type: hydraulic, spring, and hydraulic disc spring. They can also be split into shared or separate chambers. Control and motor power supplies are available with AC or DC power, and in combination with high and low voltage. Hydraulic circuit breaker mechanisms also feature oil pressure monitoring.

[0004] In view of the different types and functions of high-voltage circuit breakers, the existing technology lacks a circuit breaker energy storage test device that can meet different energy storage types and can realize automatic energy storage tests and manual energy storage tests. Summary of the Invention

[0005] The object of the present invention is to provide a high-voltage circuit breaker energy storage test device for realizing automatic or manual energy storage tests on high-voltage circuit breakers of different energy storage types.

[0006] To achieve the above-mentioned object, the present invention provides a high-voltage circuit breaker energy storage test device, comprising a power supply circuit, the power supply circuit being provided with a power supply terminal for connecting to an energy storage motor of a circuit breaker to be tested, an energy storage contactor being provided on a circuit between the power supply terminal and the power supply circuit, and a control circuit being provided corresponding to the power supply terminal;

[0007] A transfer switch is provided on the control circuit, the transfer switch includes a moving contact and a static contact, the moving contact is connected to the first pole of the control circuit, the static contact includes an automatic end, a manual end and a disconnect end, the automatic end is connected to the second pole of the control circuit through the normally open contact of the limit relay and the coil of the energy storage contactor, and the manual end is connected to the second pole of the control circuit through the self-resetting switch and the coil of the energy storage contactor;

[0008] A limit branch is further connected between the first pole and the second pole of the control circuit. The limit branch is connected in series with a coil of a limit relay and a limit port for connecting to an energy storage limit switch of a circuit breaker to be tested.

[0009] The high-voltage circuit breaker energy storage test device of the present invention includes a power supply circuit and a control circuit. The power supply circuit is connected to the power supply terminal through an energy storage contactor. The power supply terminal is used to connect the energy storage motor of the circuit breaker to be tested. Each power supply terminal is correspondingly provided with a control circuit to realize control of the energy storage motor. Each control circuit includes a first pole busbar and a second pole busbar, and is further provided with a transfer switch. The movable contact of the transfer switch is connected to the first pole busbar, the automatic end is connected to the second pole busbar through the normally open contact of the limit relay and the coil of the corresponding energy storage contactor, and the manual end is connected to the second pole busbar through the self-resetting switch and the coil of the corresponding energy storage contactor. The coil of the limit relay and the limit port of the energy storage limit switch for connecting to the circuit breaker to be tested are connected in series between the first pole busbar and the second pole busbar. During testing, the energy storage motor of the circuit breaker under test is connected to the power supply terminal, the energy storage limit switch of the circuit breaker under test is connected to the limit port, power is supplied to the power supply line and the control line through a power supply, and the transfer switch is switched to the automatic end. The energy storage motor of the circuit breaker under test automatically stores energy. Switching the transfer switch to the manual end and controlling it through the self-resetting switch can realize manual energy storage of the circuit breaker under test. The present invention can test hydraulic, spring, and hydraulic disc spring type energy storage mechanisms.

[0010] Furthermore, the above device also includes an overcurrent relay, the overcurrent detection end of the overcurrent relay is set on the line between the power supply line and the corresponding power supply terminal, and the normally closed contact of the overcurrent relay is connected in series with the coil of the energy storage contactor.

[0011] An overcurrent relay is set on the power supply line to protect the power supply line. When an abnormal overcurrent situation occurs on the power supply line, circuit protection can be achieved by disconnecting the normally closed contacts on the control circuit.

[0012] Furthermore, in the above-mentioned device, the control circuit is also provided with a self-locking relay, the normally closed contact of the self-locking relay is connected in series with the coil of the energy storage contactor to form a first branch, the normally open contact of the self-locking relay is connected in series with the coil of the self-locking relay to form a second branch, and the first branch and the second branch are connected in parallel.

[0013] Furthermore, in the above device, the control circuit is also provided with a protection relay, the normally open contact of the protection relay is connected in parallel with the normally open contact of the self-locking relay, and the coil of the protection relay and the normally open contact of the overcurrent relay are connected in series between the first pole and the second pole of the control circuit.

[0014] A self-locking relay and a protection relay are also set on the control circuit. When the motor of the circuit breaker to be tested malfunctions, the normally open contact of the protection relay is closed, and then the normally closed contact of the self-locking relay is opened. The normally open contact is closed, and the power supply to the circuit breaker to be tested can be continuously disconnected, thereby enhancing the protection of the circuit.

[0015] Furthermore, in the above device, the control circuit is also provided with a time relay, the normally open contact of the time relay is connected in parallel with the normally open contact of the self-locking relay, and the coil of the time relay and the normally open contact of the energy storage contactor are connected in series between the first pole and the second pole of the control circuit.

[0016] A time relay is also set on the control circuit. When the circuit breaker to be tested has an energy storage timeout exception, the normally open contact of the time relay can be closed, and then the normally closed contact of the self-locking relay can be disconnected. Closing the normally open contact can continuously disconnect the power supply to the circuit breaker to be tested, thereby enhancing the protection of the circuit.

[0017] Furthermore, in the above device, the control circuit is further provided with an energy storage indicator light, and the energy storage indicator light is connected in parallel with the coil of the energy storage contactor.

[0018] Furthermore, in the above device, the control circuit is further provided with an energy storage abnormality indicator light, and the energy storage abnormality indicator light is connected in parallel with the coil of the self-locking relay.

[0019] The energy storage indicator light also shows that the energy storage motor is storing energy normally, and the energy storage abnormality indicator light lights up to alarm when energy storage is abnormal, reminding the inspection personnel to troubleshoot and reduce safety hazards.

[0020] Furthermore, in the above device, the self-reset switch includes a self-reset button and a remote control terminal, and the remote control terminal is used to connect to the remote self-reset button.

[0021] It can be controlled by the self-reset button of the self-reset switch, or it can be tested at a distance by connecting the remote self-reset button through the remote terminal, so that the test personnel can control it away from the test site, which enhances safety.

[0022] Furthermore, the above device further includes an oil pressure detection circuit, which includes a display device and an oil pressure detection port. The oil pressure detection port is used to connect to the oil pressure detection sensor of the circuit breaker to be tested, and the display device and the oil pressure detection port are electrically connected.

[0023] An oil pressure detection circuit is also provided on the high-voltage circuit breaker test device to facilitate oil pressure detection of the hydraulic circuit breaker. The oil pressure status inside the hydraulic circuit breaker under test is displayed on the display device and compared with the oil pressure gauge display data on the hydraulic circuit breaker to be tested, thereby enhancing the reliability of the test.

[0024] Furthermore, the above-mentioned device also includes a motor power supply, a control power supply and a signal monitoring power supply. The motor power supply is connected to the power supply circuit, the control power supply is connected to the control circuit, and the signal monitoring power supply is connected to the oil pressure detection circuit; the motor power supply is a DC or AC power supply of 110V~380V, the control power supply is an AC power supply of 220V, and the signal monitoring power supply is a DC power supply of 24V.

[0025] The high-voltage circuit breaker energy storage test device is equipped with a motor power supply to supply power to the power supply line, a control power supply to supply power to the control line, and a signal monitoring power supply to supply power to the oil pressure detection circuit. The motor power supply adopts a 110V~380V DC or AC power supply, the control power supply adopts a 220V AC power supply, and the signal monitoring power supply adopts a 24V DC power supply, which can meet the energy storage test of different types of high-voltage circuit breakers. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a secondary principle power supply circuit of a high-voltage circuit breaker energy storage test device of the present invention;

[0027] Figure 2 A schematic diagram of a secondary principle control circuit of a high-voltage circuit breaker energy storage test device of the present invention;

[0028] Figure 3 This is a schematic diagram of the secondary principle oil pressure detection circuit of the high-voltage circuit breaker energy storage test device of the present invention;

[0029] Figure 4 This is a schematic diagram of the control panel of the high-voltage circuit breaker energy storage test device of the present invention.

[0030] In the figure, 1 is the signal area, 11 is the motor power indicator light, 12 is the control power indicator light, 13 is the signal monitoring power indicator light, 14 is the energy storage indicator light, 15 is the energy storage abnormality indicator light, 2 is the reading area, 21 is the liquid crystal display device, 22 is the oil pressure detection switch, 3 is the control area, 31 is the control end of the transfer switch, 32 is the self-reset button of the manual energy storage button, 33 is the remote manual energy storage control port, and 34 is the oil pressure detection port. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0032] Device Example:

[0033] The high-voltage circuit breaker energy storage test device of the present invention realizes energy storage tests on different types of high-voltage circuit breakers based on the electrical energy storage control principle of the circuit breaker and in combination with the energy storage principles of different types of high-voltage circuit breakers. During the energy storage test, it can mainly control the energy storage process of the high-voltage circuit breaker to be tested, so that the high-voltage circuit breaker to be tested is in a state of automatic energy storage or manual energy storage, and can monitor the process of automatic energy storage or manual energy storage in real time. When an abnormality occurs during the energy storage test, the power can be manually or automatically cut off to terminate the energy storage at any time; during the test, it can also realize automatic tripping in the event of overcurrent, overvoltage, pressure timeout, etc. in the motor energy storage circuit, thereby protecting the safety of the high-voltage circuit breaker to be tested and the operating test bench. In addition, when the high-voltage circuit breaker to be tested is a hydraulic mechanism circuit breaker, its internal oil pressure state can also be monitored in real time.

[0034] To achieve the above functions, the high-voltage circuit breaker test device of the present invention includes a power supply, power supply circuits, control circuits, signal circuits, alarm circuits, and oil pressure detection circuits. The power supply includes independent motor power supplies, control power supplies, and signal monitoring power supplies, which power the components installed on each circuit. The motor power supply is a 110V to 380V DC / AC power supply that can provide both single-phase and three-phase outputs. The control power supply is a 220V AC power supply, and the signal monitoring power supply is a 24V low-voltage DC power supply, ensuring safety and reliability.

[0035] like Figure 1 The figure shows the secondary principle power supply circuit of the high-voltage circuit breaker energy storage test device when testing the high-voltage circuit breaker to be tested. Taking the motor power supply as a 380V AC power supply as an example, the indicator light L1 in the figure is the motor power indicator light, and the motor power supply supplies power to the indicator light L1. Protective resistors are connected in series and parallel on the signal line where the indicator light L1 is located. In this embodiment, the protective resistors are two 30 kilo-ohm resistors connected in series with the indicator light L1 and a 100 kilo-ohm resistor connected in parallel with the indicator light L1. At the same time, a fuse F1 is also connected in series on the signal line where the indicator light L1 is located to protect the circuit.

[0036] The output terminals R04, S04, and T04 of the motor power supply are connected to the power supply busbars R4, S4, and T4 of the high-voltage circuit breaker energy storage test device through control switches R4, S4, and T4. The power supply busbars R4, S4, and T4 are connected to the power supply terminals through energy storage contactors. In this example, the energy storage contactors are three-phase circuit breaker contactors. Specifically, the power supply terminals U1, V1, and W1 are connected to the power supply busbars through three-phase circuit breaker contactors 88MA, wherein the power supply terminal U1 is connected to the power supply busbar R4 through phase A of the three-phase circuit breaker contactor 88MA, the power supply terminal V1 is connected to the power supply busbar S4 through phase B of the three-phase circuit breaker contactor 88MA, and the power supply terminal W1 is connected to the power supply busbar T4 through phase C of the three-phase circuit breaker contactor 88MA. Similarly, the power supply terminals U2, V2 and W2 are connected to the power supply busbars R4, S4 and T4 through the three-phase circuit breaker contactor 88MB, and the power supply terminals U3, V3 and W3 are connected to the power supply busbars R4, S4 and T4 through the three-phase circuit breaker contactor 88MC.

[0037] An overcurrent relay is provided on the line connecting the three-phase circuit breaker contactor and the power supply terminal. Specifically, an overcurrent relay 49MA is provided on the line connecting the power supply terminals U1, V1, and W1 to each phase of the three-phase circuit breaker contactor 88MA, and the overcurrent detection terminal of the overcurrent relay 49MA is provided between the power supply line and the power supply terminals U1, V1, and W1; an overcurrent relay 49MB is provided on the line connecting the power supply terminals U2, V2, and W2 to each phase of the three-phase circuit breaker contactor 88MB, and the overcurrent detection terminal of the overcurrent relay 49MB is provided between the power supply line and the power supply terminals U2, V2, and W2; an overcurrent relay 49MC is provided on the line connecting the power supply terminals U3, V3, and W3 to each phase of the three-phase circuit breaker contactor 88MC, and the overcurrent detection terminal of the overcurrent relay 49MC is provided between the power supply line and the power supply terminals U3, V3, and W3.

[0038] When the high-voltage circuit breaker energy storage test device of this embodiment is used to perform an energy storage test on the high-voltage circuit breaker to be tested, the energy storage motor of the high-voltage circuit breaker to be tested is connected to the power supply terminal to supply power to the energy storage motor of the high-voltage circuit breaker to be tested.

[0039] The high-voltage circuit breaker energy storage test device also includes multiple control circuits that can control the high-voltage circuit breaker under test to automatically or manually store energy. Each power supply terminal is equipped with a control circuit. The following describes the control circuit corresponding to power supply terminal U1 as an example. The same control circuits are configured for the remaining power supply terminals.

[0040] like Figure 2The following diagram shows the secondary control circuitry of a high-voltage circuit breaker energy storage tester. The control power supply uses a 220V AC power source, as described below. Indicator light L2 in the figure is the control power indicator, powered by the control power supply. Fuse F2 protects the signal line where control power indicator L2 resides. Terminals R02 and T02 of the control power supply are connected to the control circuit's first and second busbars R2 and T2 via switch NFB-1.

[0041] A transfer switch CS1 is provided on the control circuit and connected to the first busbar R2 of the control circuit. In this embodiment, the transfer switch CS1 is a three-position transfer switch with an oil pump energy storage function. The transfer switch CS1 includes a moving contact and a stationary contact. The moving contact serves as the switching terminal SW, while the stationary contact includes an automatic terminal 111, a manual terminal 112, and a disconnect terminal. When the high-voltage circuit breaker energy storage test device is not operating, the switching terminal SW and the disconnect terminal are closed. The switching terminal SW is connected to the first busbar T2 of the control circuit. The automatic terminal 111 is connected to the normally open contact of the limit relay 63QTA, and the manual terminal 112 is connected to the self-resetting switch. In this embodiment, the self-resetting switch is a manual control button PB1. A limit branch is also provided between the first busbar T2 and the second busbar R2 of the control circuit. The limit branch is provided with the coil of the limit relay 63QTA and limit ports A1 and A2 for connecting to the energy storage limit switch of the high-voltage circuit breaker under test.

[0042] The normally open contacts of limit relay 63QTA and manual energy charging button PB1 are both connected to the self-latching relay RA. The normally closed contacts of the self-latching relay RA are connected in series with the coil of the three-phase circuit breaker contactor 88MA to form the first branch. This branch is then connected in series with the second busbar R2 of the control circuit via the normally closed contacts of the overcurrent relay 49MA. The normally open contacts of the self-latching relay RA are connected in series with the coil of the self-latching relay RA to form the second branch. The first and second branches are connected in parallel. The control circuit also includes an energy charging indicator L4 and an energy charging abnormality indicator L7. Energy charging indicator L4 is located between the normally closed contacts of the self-latching relay RA and the second busbar R2 of the control circuit. Energy charging abnormality indicator L7 is connected in parallel with the coil of the self-latching relay RA and is used to issue an alarm if the energy charging of the high-voltage circuit breaker under test is abnormal.

[0043] The control circuit is also provided with a protection relay 49MXA, the normally open contact of the protection relay 49MXA is connected in parallel with the normally open contact of the self-locking relay RA, and the coil of the protection relay 49MXA and the coil of the overcurrent relay 49MA are connected in series between the first pole bus T2 and the second pole bus R2 of the control circuit.

[0044] The control circuit is also provided with a time relay 48TA, the normally open contact of the time relay 48TA is connected in parallel with the normally open contact of the self-locking relay RA, and the coil of the time relay 48TA and the normally open contact of the three-phase circuit breaker relay 88MA are connected in series between the first pole bus T2 and the second pole bus R2 of the control circuit.

[0045] The second-pole busbar T2 of the control circuit is connected to the coil of the time relay 48TA through the normally open auxiliary contact of the three-phase circuit breaker contactor 88MA, and the coil of the time relay 48TA is connected to the first-pole busbar R2 of the control circuit.

[0046] When the power supply terminals (U1, V1, W1) and limit ports (A1, A2) of the high-voltage circuit breaker energy storage test device of this embodiment are connected to the high-voltage circuit breaker under test, the control switches (R4, S4, T4) and switch NFB-1 are closed, and then the conversion switch CS1 is switched from the cut end to the automatic end 111, the energy storage limit switch of the high-voltage circuit breaker under test is closed, indicating that the high-voltage circuit breaker under test can undergo an energy storage test, and the high-voltage circuit breaker under test is controlled to automatically store energy. The control power supply supplies power to the coil of the limit relay 63QTA, and the normally open contact of the relay 63QTA is closed. At this time, the energy storage indicator light L4 lights up, and the energy storage motor of the high-voltage circuit breaker under test automatically stores energy for the operating mechanism.

[0047] When the switching terminal SW of the transfer switch CSI is connected to the manual terminal 112, pressing the reset button of the manual energy charging button PB1 closes the manual energy charging button PB1, which can control the high-voltage circuit breaker under test to manually charge energy. The manual energy charging button PB1 is also connected in parallel to the remote control terminal CN1, and the remote reset button connected to the remote control terminal CN1 can also be used to control manual energy charging.

[0048] During automatic or manual energy storage, if an overcurrent fault occurs in the energy storage circuit, the normally closed contact of overcurrent relay 49MA opens, the normally open contact closes, the coil of protection relay 49MXA energizes, the normally open contact of protection relay 49MXA closes, the coil of self-latching relay RA energizes, energy storage abnormality indicator L7 illuminates, the normally open contact of self-latching relay RA closes, the normally closed contact opens, energy storage indicator L4 goes out, and three-phase circuit breaker contactor 88MA opens. At this time, the control power supply continuously supplies power to the coil of self-latching relay RA, keeping its normally closed contact closed and its normally open contact open. This ensures that the motor power supply to the energy storage motor is continuously disconnected, thus protecting the energy storage circuit.

[0049] During automatic or manual energy storage, if the energy storage timeout occurs due to a motor fault or overcurrent, the coil of three-phase circuit breaker contactor 88MA loses power, the normally open contact closes, and the energy storage indicator L4 goes out. The coil of time relay 48TA becomes energized, closing the normally open contact of time relay 48TA, energizing the coil of latching relay RA. The normally open contact of latching relay RA closes, and the normally closed contact opens. At this time, the control power supply continues to supply power to the coil of latching relay RA, keeping the normally closed contact of latching relay RA closed. This ensures that the motor power supply to the energy storage motor is always disconnected, thus protecting the energy storage circuit.

[0050] The secondary principle oil pressure detection circuit of the high-voltage circuit breaker energy storage test device includes a signal monitoring power supply, a liquid crystal display device and an oil pressure detection port. The signal monitoring power supply supplies power to each component on the circuit. The signal monitoring power supply adopts a 24V DC power supply. Figure 3 As shown in the figure, the indicator light L3 is the signal monitoring power indicator light. A fuse F3 is provided on the signal line connecting the indicator light L3 and the signal monitoring power supply for protecting the circuit. When the signal monitoring power supply supplies power to any liquid crystal display device, the signal monitoring power indicator light L3 lights up.

[0051] The signal monitoring power switch CP-1 is connected to the oil pressure detection circuit busbars N2 and P2. The power supply ends of the liquid crystal display devices DPI, DP2, and DP3 are connected to the oil pressure detection circuit busbar N2 through the oil pressure detection relays TSI, TS2, and TS3 respectively. The signal ends of the liquid crystal display devices (DPI, DP2, and DP3) are connected to the oil pressure detection port provided on the high-voltage circuit breaker energy storage test device.

[0052] When the high-voltage circuit breaker to be tested is a hydraulic type, the oil pressure detection port provided on the high-voltage circuit breaker energy storage test device can also be connected to the oil pressure detection sensor of the hydraulic type high-voltage circuit breaker to be tested, and the oil pressure signal inside the hydraulic type high-voltage circuit breaker to be tested can be converted into an electrical signal, which is displayed on the corresponding liquid crystal display device (DPI, DP2, or DP3) during the energy storage test. When conducting an operational test of the hydraulic type high-voltage circuit breaker to be tested, it is also possible to adjust the oil pump pressure, calibrate the circuit breaker oil pressure gauge, and test the high and low oil pressure characteristics of the high-voltage circuit breaker.

[0053] The control panel of the high voltage circuit breaker energy storage test device is as follows Figure 4 As shown in the figure, according to different functions, from top to bottom they are: signal area 1, reading area 2, and control area 3. Signal area 1 mainly displays the circuit breaker operation phase sequence indication, the start signal, stop signal, and alarm signal of the energy storage circuit; reading area 2 mainly displays the internal oil pressure status of the high-voltage circuit breaker under test when it is a hydraulic high-voltage circuit breaker, so as to realize real-time monitoring of its internal oil pressure; control area 3 is mainly used to control the above-mentioned control circuits.

[0054] Specifically, the three indicator lights in the upper portion of signal area 1, from left to right, are the motor power indicator light L1, the control power indicator light L2, and the signal monitoring power indicator light L3. When the motor power is supplying power to the energy storage motor of the high-voltage circuit breaker under test, the motor power indicator light 11 illuminates; when the control power is connected to the control circuit to control the high-voltage circuit breaker under test for automatic or manual energy storage, the control power indicator light 12 illuminates; and when the signal monitoring power is connected to the oil pressure sensor detection circuit, the signal monitoring power indicator light 13 illuminates. The six indicator lights in the lower portion of signal area 1 are divided into three groups, two per group from left to right. Taking the right group of indicators as an example, the energy storage indicator light 14 indicates whether the energy storage motor of the high-voltage circuit breaker under test is operating. The light is on when the energy storage motor is starting and storing energy, and the light is off when the energy storage motor is stopped. The energy storage abnormality indicator light 15 is used to indicate an abnormality alarm signal for the energy storage motor. It illuminates when the energy storage motor experiences an abnormality such as overcurrent, overvoltage, or energy storage timeout. It does not illuminate when the energy storage motor is normal. The remaining two groups of indicators are similar to this group of indicators.

[0055] Reading area 2 includes three liquid crystal display devices. A control switch of the oil pressure detection circuit is provided on one side of each liquid crystal display device. When the high-voltage circuit breaker to be tested is a hydraulic high-voltage circuit breaker, the oil pressure detection sensor of the hydraulic high-voltage circuit breaker to be tested is connected through the oil pressure detection port, and the control switch of the oil pressure detection circuit is started to detect and display the internal oil pressure.

[0056] by Figure 4 The content selected by the first dotted box on the right is introduced. The control area 3 includes the control end 31 of the conversion switch, the self-reset button 32 of the manual energy storage button, the remote manual energy storage control port 33, and the oil pressure detection port 34 from top to bottom. By operating the control end 31 of the conversion switch, the energy storage motor of the high-voltage circuit breaker to be tested can be controlled to automatic energy storage or manual energy storage; when the control end 31 of the conversion switch is switched to manual energy storage, the start and stop of the manual energy storage process can be achieved by pressing the self-reset button 32 of the manual energy storage button, and it can also be controlled remotely through the remote self-reset button connected to the remote manual energy storage control port 33; the oil pressure detection port 34 can be connected to the oil pressure detection sensor of the hydraulic high-voltage circuit breaker to be tested through a cable to obtain the oil pressure inside the hydraulic high-pressure sensor to be tested. The other two columns of the control area 3 are similar to the content introduced in the first dotted box on the right, and will not be explained again.

[0057] During the manufacturing process of the high-voltage circuit breaker energy storage test device of this embodiment, each component installed on the control panel is defined and numbered, and an identification nameplate is made with clear text descriptions to serve as identification and warning functions.

[0058] Next, we will further illustrate the energy storage test of a hydraulic high-voltage circuit breaker by using the above-mentioned high-voltage circuit breaker energy storage test device. Figure 4 Take the part selected by the dotted box on the right as an example:

[0059] First, the energy storage motor and energy storage limit switch of the hydraulic high-voltage circuit breaker to be tested are matched and connected with the above-mentioned power supply terminals (U1, V1, W1) and limit ports (A1, A2) through cables, and the oil pressure detection sensor of the hydraulic high-voltage circuit breaker to be tested is connected to the oil pressure detection port 34.

[0060] When the automatic energy storage test is performed on the hydraulic high-voltage circuit breaker to be tested, the automatic energy storage limit switch of the hydraulic high-voltage circuit breaker to be tested should be in a closed state, indicating that automatic energy storage is possible. The control end 31 of the conversion switch is switched to automatic energy storage, and the energy storage indicator light 14 reflecting the normal operation of the energy storage motor lights up, and the energy storage abnormality indicator light 15 reflecting the abnormal alarm of the energy storage motor is off, indicating that the automatic energy storage of the energy storage motor is normal. If the energy storage indicator light 14 goes out and the energy storage abnormality indicator light 15 goes out, it means that the automatic energy storage of the energy storage motor is abnormal and should be handled in time.

[0061] When performing a manual energy storage test on the hydraulic high-voltage circuit breaker to be tested, switch the control end 31 of the transfer switch to manual energy storage, press the self-reset button 32 of the manual energy storage button to start manual energy storage. During this operation, the sound of the relay closing can be clearly heard. The energy storage test can also be performed by connecting the remote self-reset button through the remote manual energy storage control port 33.

[0062] When performing oil pressure testing on the hydraulic high-pressure sensor to be tested, control the hydraulic high-pressure circuit breaker to be tested to store energy pole by pole and start to build up oil pressure. During the energy storage process, observe the oil pressure displayed in the reading area and check it with the oil pressure gauge of the hydraulic high-pressure circuit breaker body to be tested. Combined with the test characteristics test items, compare and analyze the pressure gauge display value and the oil pressure sensor value displayed in the reading area.

[0063] The above example illustrates the energy storage test of a more complex hydraulic high-voltage circuit breaker. Other types of high-voltage circuit breaker mechanisms, such as spring mechanisms and hydraulic disc spring mechanisms, can also be tested pole by pole using this wiring method and test implementation method. Because the energy storage time of different types of mechanisms varies, the internal time relay can be appropriately adjusted to suit the different energy storage times of different product types. In addition, during the test, different types of common-tank mechanisms and separate-tank mechanisms, namely single-phase and three-phase mechanisms, may appear. This requires adjusting the external input and output wiring of the high-voltage circuit breaker energy storage test device, and paying attention to the corresponding positions between the phase sequences during wiring.

Claims

1. A high-voltage circuit breaker energy storage test device, characterized in that: It includes a power supply circuit, the power supply circuit is provided with a power supply terminal for connecting to the energy storage motor of the circuit breaker to be tested, an energy storage contactor is provided on the line between the power supply terminal and the power supply circuit, and the power supply terminal is correspondingly provided with a control circuit; A transfer switch is provided on the control circuit, the transfer switch includes a moving contact and a static contact, the moving contact is connected to the first pole of the control circuit, the static contact includes an automatic end, a manual end and a disconnect end, the automatic end is connected to the second pole of the control circuit through the normally open contact of the limit relay and the coil of the energy storage contactor, and the manual end is connected to the second pole of the control circuit through the self-resetting switch and the coil of the energy storage contactor; A limit branch is further connected between the first pole and the second pole of the control circuit. The limit branch is connected in series with a coil of a limit relay and a limit port for connecting to an energy storage limit switch of a circuit breaker to be tested.

2. The high-voltage circuit breaker energy storage test device according to claim 1, characterized in that: It also includes an overcurrent relay, wherein the overcurrent detection terminal of the overcurrent relay is arranged on the line between the power supply line and the corresponding power supply terminal, and the normally closed contact of the overcurrent relay is connected in series with the coil of the energy storage contactor.

3. The high-voltage circuit breaker energy storage test device according to claim 2, characterized in that: The control circuit is also provided with a self-locking relay, the normally closed contact of the self-locking relay is connected in series with the coil of the energy storage contactor to form a first branch, the normally open contact of the self-locking relay is connected in series with the coil of the self-locking relay to form a second branch, and the first branch and the second branch are connected in parallel.

4. The high-voltage circuit breaker energy storage test device according to claim 3, characterized in that: The control circuit is further provided with a protection relay, the normally open contact of the protection relay is connected in parallel with the normally open contact of the self-locking relay, and the coil of the protection relay and the normally open contact of the overcurrent relay are connected in series between the first pole and the second pole of the control circuit.

5. The high-voltage circuit breaker energy storage test device according to claim 4, characterized in that: The control circuit is further provided with a time relay, the normally open contact of the time relay is connected in parallel with the normally open contact of the self-locking relay, and the coil of the time relay and the normally open contact of the energy storage contactor are connected in series between the first pole and the second pole of the control circuit.

6. The high-voltage circuit breaker energy storage test device according to claim 5, characterized in that: The control circuit is further provided with an energy storage indicator light, which is connected in parallel with the coil of the energy storage contactor.

7. The high-voltage circuit breaker energy storage test device according to claim 6, characterized in that: The control circuit is further provided with an energy storage abnormality indicator light, and the energy storage abnormality indicator light is connected in parallel with the coil of the self-locking relay.

8. The high-voltage circuit breaker energy storage test device according to claim 7, characterized in that: The self-reset switch includes a self-reset button and a remote control terminal, and the remote control terminal is used to connect to the remote self-reset button.

9. The high-voltage circuit breaker energy storage test device according to claim 1, characterized in that: It also includes an oil pressure detection circuit, which includes a display device and an oil pressure detection port. The oil pressure detection port is used to connect to the oil pressure detection sensor of the circuit breaker to be tested. The display device and the oil pressure detection port are electrically connected.

10. The high-voltage circuit breaker energy storage test device according to claim 9, characterized in that: It also includes a motor power supply, a control power supply and a signal monitoring power supply. The motor power supply is connected to the power supply circuit, the control power supply is connected to the control circuit, and the signal monitoring power supply is connected to the oil pressure detection circuit; the motor power supply is a 110V~380V DC or AC power supply, the control power supply is a 220V AC power supply, and the signal monitoring power supply is a 24V DC power supply.

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