Low-pressure locking alarm system for circuit breaker and three stations

Abstract

The utility model discloses a low-air-pressure locking alarm system for a circuit breaker and three stations, which relates to the field of electrical control and comprises a low-air-pressure locking signal expansion loop and a low-air-pressure alarm signal expansion loop. The low-air-pressure locking signal expansion loop is connected with the negative end of the power supply of the three-station control module, and can disconnect the three-station control loop according to the air pressure signal; the low-pressure alarm signal expansion loop is connected with a buzzer to form low-pressure alarm; according to the utility model, the problem of electrical breakdown caused by three-station interval or circuit breaker gas box SF6 low pressure due to insufficient insulation performance and false operation of three stations is solved. And on-site alarm and background alarm output are configured, so that the actual requirements of on-site operation and maintenance and background operation and maintenance are met, the overall safety and visibility are improved, and the stability of power operation and maintenance is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of electrical control, in particular to a low-pressure locking alarm system for a circuit breaker and a three-station. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] Due to the increasing application scenarios of miniaturized equipment and high-altitude equipment, the 35kV gas-filled cabinet has become an important part of the power industry; it is mainly composed of three-position switches, circuit breakers and other major components, among which the three-position switch is at the upper end of the circuit breaker.

[0004] Existing electrical designs are all based on locking circuit breakers at low pressure, but not locking the electric three-position circuit breaker. This can easily lead to insufficient insulation performance and misoperation of the three-position circuit breaker when the SF6 pressure in the three-position interval or circuit breaker gas box is low, causing electrical breakdown. Utility Model Content

[0005] The purpose of the utility model is to provide a low-pressure lockout alarm system for circuit breakers and three-stations to solve the problem that when the three-station interval or the SF6 gas box of the circuit breaker has low pressure, the insulation performance is insufficient, the three-station is malfunctioned, and electrical breakdown occurs.

[0006] The technical solution of the utility model is as follows:

[0007] A low-pressure lockout alarm system for a circuit breaker and three-station, comprising: a low-pressure lockout signal expansion circuit and a low-pressure alarm signal expansion circuit; the low-pressure lockout signal expansion circuit is connected to the negative end of the power supply of a three-station control module, and can disconnect the three-station control circuit according to the air pressure signal; the low-pressure alarm signal expansion circuit is connected to a buzzer to form a low-pressure alarm.

[0008] Furthermore, the low-pressure locking signal expansion circuit is connected to the negative terminal of the circuit breaker control circuit power supply, and can disconnect the circuit breaker control circuit according to the air pressure signal.

[0009] Furthermore, the low air pressure alarm signal expansion circuit is connected to a self-locking button, and the alarm can be triggered through the self-locking button.

[0010] Furthermore, the low air pressure alarm signal expansion circuit is connected to the microcomputer protection system to submit signal data to the back-end operation and maintenance personnel.

[0011] Furthermore, the low pressure lockout signal expansion circuit includes:

[0012] The 3 / 4 pins of the circuit breaker room pressure gauge KP1 and the three-station room pressure gauge KP2 are connected in parallel and then connected in series with an intermediate relay KA3 to form a low-pressure lockout signal expansion circuit.

[0013] Furthermore, the low air pressure alarm signal expansion circuit includes:

[0014] The 1 / 2 pins of the pressure gauge KP1 in the circuit breaker room and the pressure gauge KP2 in the three-station room are connected in parallel and then connected in series with an intermediate relay KA4 to form a low pressure alarm signal expansion circuit.

[0015] Furthermore, the 9 / 1 pin of the intermediate relay KA3 is connected in series to the negative terminal of the power supply of the XP three-position control module. When the air pressure locking condition is met, the intermediate relay KA3 becomes an open point, disconnecting the three-position control loop, and putting the three-position switch in a locked state.

[0016] Furthermore, the 10 / 2 pin of the intermediate relay KA3 is connected in series to the negative terminal of the power supply of the QF circuit breaker control circuit. When the air pressure locking condition is met, the intermediate relay KA3 becomes an open point, disconnecting the QF circuit breaker control circuit, and putting the QF circuit breaker in a locked state.

[0017] Furthermore, the SB1 self-locking button and the FMQ buzzer are connected in series to the 10 / 6 pin of the intermediate relay KA4. When a low pressure alarm is generated, there is an audible and visual alarm output feedback on the cabinet site, and the SB1 self-locking button can release the audible and visual alarm.

[0018] Furthermore, the 9 / 5 pin of the intermediate relay KA4 and the 11 / 7 pin of the intermediate relay KA3 are connected in series to the 2X14 and 5X1 inputs of the microcomputer protection 1n to submit signal data to the backend operation and maintenance personnel.

[0019] Compared with the existing technology, the beneficial effects of the utility model are:

[0020] A low-pressure lockout alarm system for circuit breakers and three-stations, including: a low-pressure lockout signal expansion circuit and a low-pressure alarm signal expansion circuit; the low-pressure lockout signal expansion circuit is connected to the negative end of the power supply of the three-station control module, and can disconnect the three-station control circuit according to the air pressure signal; the low-pressure alarm signal expansion circuit is connected to a buzzer to form a low-pressure alarm; the utility model solves the problem of insufficient insulation performance and misoperation of the three-station when the SF6 gas tank of the three-station interval or the circuit breaker is under low pressure, causing electrical breakdown. It is also equipped with on-site alarm and background alarm output to meet the actual needs of on-site operation and maintenance and background operation and maintenance, improve overall safety and visibility, and strengthen the stability of power operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A block diagram of a low-pressure lockout alarm system for a circuit breaker and a three-station;

[0022] Figure 2 The wiring diagram for the low pressure lockout signal expansion circuit to access the three-station control module power supply;

[0023] Figure 3 The wiring diagram for connecting the low pressure lockout signal expansion circuit to the QF circuit breaker control circuit power supply;

[0024] Figure 4 Wiring diagram for the low pressure alarm signal expansion circuit to connect the SB1 self-locking button and the FMQ buzzer;

[0025] Figure 5 This is the wiring diagram for connecting the low pressure alarm signal expansion circuit to the microcomputer. DETAILED DESCRIPTION

[0026] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0027] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0028] Embodiment 1

[0029] The existing electrical designs are all based on low-pressure locking circuit breakers, but not locking the electric three-position, which may easily cause the three-position interval or the circuit breaker gas box SF6 to have low pressure, and cause the three-position to malfunction and cause electrical breakdown. This embodiment aims at this problem and proposes a low-pressure locking alarm system for circuit breakers and three-positions, including:

[0030] A low-pressure lockout signal expansion circuit and a low-pressure alarm signal expansion circuit; the low-pressure lockout signal expansion circuit is connected to the negative terminal of the power supply of the three-station control module, and can disconnect the three-station control circuit according to the air pressure signal; the low-pressure alarm signal expansion circuit is connected to the buzzer to form a low-pressure alarm.

[0031] Furthermore, the low-pressure locking signal expansion circuit is connected to the negative terminal of the circuit breaker control circuit power supply, and can disconnect the circuit breaker control circuit according to the air pressure signal.

[0032] Furthermore, the low air pressure alarm signal expansion circuit is connected to a self-locking button, and the alarm can be triggered through the self-locking button.

[0033] Furthermore, the low air pressure alarm signal expansion circuit is connected to the microcomputer protection system to submit signal data to the back-end operation and maintenance personnel.

[0034] Furthermore, the low pressure lockout signal expansion circuit includes:

[0035] The 3 / 4 pins of the circuit breaker room pressure gauge KP1 and the three-station room pressure gauge KP2 are connected in parallel and then connected in series with an intermediate relay KA3 to form a low-pressure lockout signal expansion circuit.

[0036] Furthermore, the low air pressure alarm signal expansion circuit includes:

[0037] The 1 / 2 pins of the pressure gauge KP1 in the circuit breaker room and the pressure gauge KP2 in the three-station room are connected in parallel and then connected in series with an intermediate relay KA4 to form a low pressure alarm signal expansion circuit.

[0038] Furthermore, the 9 / 1 pin of the intermediate relay KA3 is connected in series to the negative terminal of the power supply of the XP three-position control module. When the air pressure locking condition is met, the intermediate relay KA3 becomes an open point, disconnecting the three-position control loop, and putting the three-position switch in a locked state.

[0039] Furthermore, the 10 / 2 pin of the intermediate relay KA3 is connected in series to the negative terminal of the power supply of the QF circuit breaker control circuit. When the air pressure locking condition is met, the intermediate relay KA3 becomes an open point, disconnecting the QF circuit breaker control circuit, and putting the QF circuit breaker in a locked state.

[0040] Furthermore, the SB1 self-locking button and the FMQ buzzer are connected in series to the 10 / 6 pin of the intermediate relay KA4. When a low pressure alarm is generated, there is an audible and visual alarm output feedback on the cabinet site, and the SB1 self-locking button can release the audible and visual alarm.

[0041] In this embodiment, specifically, Figure 1As shown, a low-pressure lockout alarm system for a circuit breaker and three-station room is formed by connecting a circuit breaker room pressure gauge KP1 and a three-station room pressure gauge KP2 (3 / 4 pin, low-pressure lockout 1.1 bar) in parallel and then connecting an intermediate relay KA3 (14 / 13 pin, relay power supply) in series to form a low-pressure lockout signal expansion circuit; the circuit breaker room pressure gauge KP1 and the three-station room pressure gauge KP2 (1 / 2 pin, low-pressure alarm 1.2 bar) are connected in parallel and then connected in series to an intermediate relay KA4 (14 / 13 pin, relay power supply) to form a low-pressure alarm signal expansion circuit.

[0042] Note: When the pressure gauge is 1.4bar, the 1 / 2 and 3 / 4 pins of KP1 and KP2 are open points; when the pressure gauge is 1.2bar, the 1 / 2 pins of KP1 and KP2 are closed points and the 3 / 4 pins are open points; when the pressure gauge is 1.1bar, the 1 / 2 and 3 / 4 pins of KP1 and KP2 are closed points.

[0043] like Figure 2 As shown, the intermediate relay KA3 (9 / 1 pin, closed point, when the pressure gauge is 1.1bar, the closed point becomes an open point) is connected in series to the negative terminal of the XP three-position control module power supply. When the pressure locking condition is met, the intermediate relay KA3 becomes an open point, disconnecting the three-position control circuit, and putting the three-position switch in a locked state. It is used to solve the problem of insufficient insulation performance and malfunction of the three-position when the SF6 gas tank of the three-position interval or circuit breaker is under low pressure, causing electrical breakdown.

[0044] like Figure 3 As shown, the intermediate relay KA3 (10 / 2 pin, closed point, when the pressure gauge is 1.1 bar, the closed point becomes an open point) is connected in series to the negative end of the power supply of the QF circuit breaker control circuit. When the pressure locking condition is met, the intermediate relay KA3 becomes an open point, disconnecting the QF circuit breaker control circuit and putting the QF circuit breaker in a locked state. It is used to solve the problem of insufficient insulation performance and malfunction of the circuit breaker when the SF6 gas tank of the three-station interval or circuit breaker is under low pressure, causing electrical breakdown.

[0045] like Figure 4 As shown, the intermediate relay KA4 (10 / 6 pin, open point, when the pressure gauge is 1.2bar, the open point becomes a closed point) is connected in series with the SB1 self-locking button and the FMQ buzzer. When a low pressure alarm is formed, there is an audible and visual alarm output feedback on the cabinet site, and the SB1 self-locking button can release the audible and visual alarm, so that the operation and maintenance personnel will not keep the alarm after arriving at the site, reducing interference to personnel.

[0046] like Figure 5As shown, the intermediate relay KA4 (9 / 5 pin, open point, when the pressure gauge is 1.2bar, the open point becomes closed point) and the intermediate relay KA3 (11 / 7 pin, open point, when the pressure gauge is 1.1bar, the open point becomes closed point) are connected in series to the 2X14 and 5X1 inputs of the microcomputer protection 1n to submit signal data to the background operation and maintenance personnel, so as to facilitate timely maintenance and elimination of this fault.

[0047] According to the above technical solution, low-pressure locking circuit breakers and electric three-position devices are realized, and alarm locking signals are provided to on-site and background operation and maintenance, which effectively improves product operation and maintenance safety and reduces the risk of misoperation.

[0048] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

[0049] This background technology section is provided to generally present the context of the present invention, and the work of the currently named inventors, the work to the extent described in this background technology section, and aspects of this section that did not constitute prior art at the time of application are neither explicitly nor implicitly admitted to be prior art of the present invention.

Claims

1. A low pressure lock alarm system for circuit breakers and three stations, characterized in that: include: A low-pressure lockout signal expansion circuit and a low-pressure alarm signal expansion circuit; the low-pressure lockout signal expansion circuit is connected to the negative terminal of the power supply of the three-station control module, and can disconnect the three-station control circuit according to the air pressure signal; the low-pressure alarm signal expansion circuit is connected to the buzzer to form a low-pressure alarm.

2. A low pressure lock alarm system for a circuit breaker and three-station according to claim 1, characterized in that: The low-pressure locking signal expansion circuit is connected to the negative end of the circuit breaker control circuit power supply, and can disconnect the circuit breaker control circuit according to the air pressure signal.

3. A low-pressure lockout alarm system for a circuit breaker and three-station according to claim 2, characterized in that: The low air pressure alarm signal expansion circuit is connected to a self-locking button, and the alarm can be triggered through the self-locking button.

4. A low pressure lock alarm system for a circuit breaker and three-station according to claim 3, characterized in that: The low air pressure alarm signal expansion circuit is connected to the microcomputer protection system to submit signal data to the background operation and maintenance personnel.

5. A low pressure lock alarm system for circuit breakers and three-stations according to claim 1, characterized in that: The low pressure lockout signal expansion circuit includes: The 3 / 4 pins of the circuit breaker room pressure gauge KP1 and the three-station room pressure gauge KP2 are connected in parallel and then connected in series with an intermediate relay KA3 to form a low-pressure lockout signal expansion circuit.

6. A low-pressure lockout alarm system for a circuit breaker and three-station according to claim 5, characterized in that: The low air pressure alarm signal expansion circuit includes: The 1 / 2 pins of the pressure gauge KP1 in the circuit breaker room and the pressure gauge KP2 in the three-station room are connected in parallel and then connected in series with an intermediate relay KA4 to form a low pressure alarm signal expansion circuit.

7. A low-pressure lockout alarm system for a circuit breaker and three-station according to claim 6, characterized in that: The 9 / 1 pin of the intermediate relay KA3 is connected in series to the negative terminal of the power supply of the XP three-position control module. When the air pressure locking condition is met, the intermediate relay KA3 becomes an open point, disconnecting the three-position control circuit and putting the three-position switch in a locked state.

8. A low-pressure lockout alarm system for a circuit breaker and three-station according to claim 6, characterized in that: The 10 / 2 pin of the intermediate relay KA3 is connected in series to the negative terminal of the power supply of the QF circuit breaker control circuit. When the air pressure locking condition is met, the intermediate relay KA3 becomes an open point, disconnecting the QF circuit breaker control circuit and putting the QF circuit breaker in a locked state.

9. A low-pressure lockout alarm system for a circuit breaker and three-station according to claim 6, characterized in that: The 10 / 6 pins of the intermediate relay KA4 are connected in series with the SB1 self-locking button and the FMQ buzzer. When a low pressure alarm is generated, there is an audible and visual alarm output feedback on the cabinet site, and the SB1 self-locking button can release the audible and visual alarm.

10. A low-pressure lockout alarm system for a circuit breaker and three-station according to claim 6, characterized in that: The 9 / 5 pin of the intermediate relay KA4 and the 11 / 7 pin of the intermediate relay KA3 are connected in series to the 2X14 and 5X1 input quantities of the microcomputer protection 1n to submit signal data to the background operation and maintenance personnel.

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