Device for adding closing monitoring loop to circuit breaker of high-voltage switch cabinet

Abstract

The utility model relates to the technical field of a high-voltage switch cabinet circuit breaker switch-on monitoring loop device, in particular to a high-voltage switch cabinet circuit breaker switch-on monitoring loop device, which comprises a control bus positive electrode and a control bus negative electrode, a display structure is arranged outside the positive electrode of the control bus, the monitoring structure comprises a power frequency direct current voltmeter and a variable frequency direct current voltmeter, and positive charges of the power frequency direct current voltmeter are taken from the positive electrode of the control bus and are connected with the local and remote change-over switch in series. According to the high-voltage switch cabinet circuit breaker, the switch-on monitoring loop device is additionally arranged, when a control bus loses voltage, a comprehensive protection device breaks down, and a power frequency limit switch and a power frequency and frequency conversion switching knife switch are not in place, a DCS cannot be switched on when it is monitored that a voltmeter displays the voltage of 0V, and at the moment, operation and maintenance personnel can discover and handle abnormities in time, so that the operation and maintenance efficiency is improved. And the practicability and convenience of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of a device for adding a closing monitoring circuit to a high-voltage switch cabinet breaker, and specifically relates to a device for adding a closing monitoring circuit to a high-voltage switch cabinet breaker. Background Technique

[0002] The monitoring and control circuit of the switch cabinet breaker is applied in two aspects. One is: when the DCS remotely closes, it monitors whether the closing instruction transmission is normal. The other is: when the high-voltage switch cabinet is in the hot standby state, it monitors the voltage of the control bus circuit in real time, the remote and local transfer switch, the auxiliary contact of the 10KV breaker working position, the integrated protection and measurement and control device, the closing coil of the breaker, and the state of each knife switch auxiliary contact after the electrical operator switches the industrial frequency and variable frequency knife switches. The closing control monitoring circuit of the high-voltage switch cabinet breaker can enable electrical personnel to quickly discover equipment abnormalities during daily operation and maintenance, and ensure the successful closing of the switch cabinet.

[0003] In the existing closing monitoring circuit device, when the switch cabinet is in the hot standby state, before closing the switch cabinet and after switching the industrial frequency and variable frequency knife switches, a multimeter needs to be used to measure whether the circuit is normal, which makes the operation more cumbersome and reduces the practicability of the device. Therefore, there is an urgent need for a device for adding a closing monitoring circuit to a high-voltage switch cabinet breaker to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for adding a closing monitoring circuit to a high-voltage switch cabinet breaker, so as to solve the problem that in the existing closing monitoring circuit device, when the switch cabinet is in the hot standby state, before closing the switch cabinet and after switching the industrial frequency and variable frequency knife switches, a multimeter needs to be used to measure whether the circuit is normal, which makes the operation more cumbersome and reduces the practicability of the device as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A device for adding a closing monitoring circuit to a high-voltage switch cabinet breaker, including: the positive control bus and the negative control bus, a monitoring structure is arranged outside the positive control bus, a display structure is arranged outside the positive control bus, the monitoring structure includes an industrial frequency DC voltmeter and a variable frequency DC voltmeter, the positive charge of the industrial frequency DC voltmeter is taken from the positive control bus and is connected in series with the local and remote transfer switch, the negative charge of the industrial frequency DC voltmeter is taken from the negative control bus and is connected in series through the closing coil, the integrated protection device, the industrial frequency limit switch and the DCS industrial frequency closing instruction in sequence, the positive charge of the variable frequency DC voltmeter is taken from the positive control bus and is connected in series with the local and remote transfer switch, the negative charge of the variable frequency DC voltmeter is taken from the negative control bus and is connected in series through the closing coil, the integrated protection device, the variable frequency limit switch and the DCS variable frequency closing instruction in sequence.

[0006] Preferably, a PA air switch is added after the local and remote transfer switch, and the local and remote transfer switch is connected in series with the PA air switch.

[0007] Preferably, a energy storage limit switch is provided after the closing coil and the integrated protection device.

[0008] Preferably, a circuit breaker operating position limit switch is provided between the integrated protection device and the power frequency limit switch.

[0009] Preferably, the display structure includes a circuit breaker closing operation indicator light, and the circuit breaker closing operation indicator light is connected in series with the circuit breaker closing limit switch.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. The circuit breaker of the high-voltage switchgear with an increased closing monitoring loop device is provided with a monitoring structure. The closing control monitoring loop of the circuit breaker of the high-voltage switchgear adds a PA air switch after the local and remote transfer switch, and adds a DC voltmeter in parallel on the DCS closing command to monitor the control loop during the equipment operation and hot standby states. When the loop is normal, the DC voltage of 220V is displayed on the monitored voltmeter, and the circuit breaker can be closed normally at this time. When the control bus loses voltage, the integrated protection device, the power frequency limit switch, and the power frequency and frequency conversion switching knife switch are not in place, and the monitored voltmeter shows 0V voltage, the DCS cannot close the circuit breaker. By monitoring the voltage of the control loop, the operation and maintenance personnel can timely discover abnormalities and handle them in a timely manner to ensure the stable operation of the equipment. Through this design, when the control bus loses voltage, the integrated protection device fails, the power frequency limit switch, and the power frequency and frequency conversion switching knife switch are not in place, the circuit breaker of the high-voltage switchgear with an increased closing monitoring loop device can use the monitored voltmeter to display 220V voltage, and the DCS cannot close the circuit breaker. At this time, the operation and maintenance personnel can timely discover abnormalities and handle them in a timely manner, improving the practicability and convenience of the device.

[0012] 2. The circuit breaker of the high-voltage switchgear with an increased closing monitoring loop device is provided with a display structure. When the control bus loses voltage, the integrated protection device, the power frequency limit switch, and the power frequency and frequency conversion switching knife switch are not in place, and the monitored voltmeter shows 0V voltage, the DCS cannot close the circuit breaker, and the circuit breaker closing operation indicator light is not on. At this time, it more obviously reminds the operation and maintenance personnel to timely discover abnormalities and handle them in a timely manner to ensure the stable operation of the equipment. Through this design, when the control bus loses voltage, the integrated protection device, the power frequency limit switch, and the power frequency and frequency conversion switching knife switch are not in place, the circuit breaker of the high-voltage switchgear with an increased closing monitoring loop device can use the extinguishing condition of the high-resistance indicator light to conveniently judge the closing monitoring loop, and it is more beneficial for the operation and maintenance personnel to timely discover abnormalities, which is conducive to improving the practicability and convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1This is a schematic diagram of the working principle of the present utility model.

[0014] In the figure: 111, positive pole of the control bus; 112, negative pole of the control bus; 2, monitoring structure; 211, power frequency DC voltmeter; 212, closing coil; 213, comprehensive protection device; 214, power frequency limit switch; 215, local and remote transfer switch; 216, DCS power frequency closing instruction; 217, variable frequency limit switch; 218, DCS variable frequency closing instruction; 219, 1P1A air switch; 220, breaker working position limit switch; 221, energy storage limit switch; 222, variable frequency DC voltmeter; 3, display structure; 311, breaker closing operation indicator light; 312, breaker closing limit switch. Specific embodiments

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] Please refer to Figure 1 , an embodiment provided by the present utility model:

[0017] A device for adding a closing monitoring circuit to a circuit breaker of a high-voltage switchgear, comprising: a positive control bus 111 and a negative control bus 112. A monitoring structure 2 is arranged outside the positive control bus 111, and a display structure 3 is arranged outside the positive control bus 111. The monitoring structure 2 includes a power frequency DC voltmeter 211. The positive charge of the power frequency DC voltmeter 211 is taken from the positive control bus 111 and is connected in series with a local and remote transfer switch 215. The negative charge of the power frequency DC voltmeter 211 is taken from the negative control bus 112 and is sequentially connected in series through a closing coil 212, a comprehensive protection device 213, a power frequency limit switch 214, and a DCS power frequency closing instruction 216. The positive charge of the variable frequency DC voltmeter 222 is taken from the positive control bus 111 and is connected in series with the local and remote transfer switch 215. The negative charge of the variable frequency DC voltmeter 222 is taken from the negative control bus 112 and is sequentially connected in series through the closing coil 212, the comprehensive protection device 213, a variable frequency limit switch 217, and a DCS variable frequency closing instruction 218. Through this design, for the closing control monitoring circuit of the high-voltage switchgear circuit breaker, a 1P1A air switch 219 is added after the local and remote transfer switch 215, and a DC voltmeter is added in parallel on the DCS closing instruction to monitor the control circuit during the operation and hot standby states of the equipment. When the circuit is normal, the monitored voltmeter shows a DC voltage of 220V, and closing can be performed normally at this time. When the control bus loses voltage, the comprehensive protection device 213, the power frequency limit switch 214, and the power frequency and variable frequency switching knife switch are not in place, and the monitored voltmeter shows 0V voltage, the DCS cannot close. By monitoring the voltage of the control circuit, the operation and maintenance personnel can timely discover abnormalities and handle them in a timely manner to ensure the stable operation of the equipment.

[0018] Further, a 1P1A air switch 219 is added after the local and remote transfer switch 215, and the local and remote transfer switch 215 is connected in series with the 1P1A air switch 219.

[0019] Further, a energy storage limit switch 221 is arranged after the closing coil 212 and the comprehensive protection device 213.

[0020] Further, a circuit breaker working position limit switch 220 is arranged between the comprehensive protection device 213 and the power frequency limit switch 214.

[0021] Further, the display structure 3 includes a circuit breaker closing operation indicator light 311, and the circuit breaker closing operation indicator light 311 is connected in series with a circuit breaker closing limit switch 312. Through this design, when the control bus loses voltage, the comprehensive protection device 213, the power frequency limit switch 214, and the power frequency and variable frequency switching knife switch are not in place, and the monitored voltmeter shows 0V voltage, the DCS cannot close, and the circuit breaker closing operation indicator light 311 does not light up. At this time, it more obviously reminds the operation and maintenance personnel to timely discover abnormalities and handle them in a timely manner to ensure the stable operation of the equipment.

[0022] Working principle:

[0023] The closing control monitoring circuit of the high-voltage switch cabinet circuit breaker adds a 1P1A circuit breaker 219 after the local and remote conversion switch 215, and adds a DC voltmeter in parallel to the DCS closing command to monitor the control circuit when the equipment is running and in hot standby status. When the circuit is normal, the monitoring voltmeter displays a DC voltage of 220V, and the circuit can be closed normally. When the control bus loses pressure, the integrated protection device 213 fails, the power frequency limit switch 214, and the power frequency and variable frequency switching knife switch are not in place, the monitoring voltmeter displays 0V voltage, and the DCS cannot close the circuit. By monitoring the control circuit voltage, the operation and maintenance personnel can detect abnormalities in time, handle abnormalities in time, and ensure stable operation of the equipment.

[0024] When the control bus loses pressure, the integrated protection device 213, the power frequency limit switch 214, and the power frequency and variable frequency switching switch are not in place, the monitoring voltmeter displays 0V voltage, the DCS cannot close the switch, and the circuit breaker closing operation indicator light 311 is not on. At this time, it is more obvious to remind the operation and maintenance personnel to discover the abnormality in time, deal with the abnormality in time, and ensure the stable operation of the equipment. The operation is now completed.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A device for adding a closing monitoring circuit to a high-voltage switch cabinet circuit breaker, comprising: A control bus positive electrode (111) and a control bus negative electrode (112), characterized in that: a monitoring structure (2) is provided outside the control bus positive electrode (111), a display structure (3) is provided outside the control bus positive electrode (111), the monitoring structure (2) comprises an industrial frequency DC voltmeter (211) and a variable frequency DC voltmeter (222), the positive charge of the industrial frequency DC voltmeter (211) is taken from the control bus positive electrode (111), and is connected in series with the local and remote conversion switch (215), and the negative charge of the industrial frequency DC voltmeter (211) is taken from the control bus negative electrode (1 12), and is sequentially connected in series via a closing coil (212), a comprehensive protection device (213), a power frequency limit switch (214), and a DCS power frequency closing command (216); the positive charge of the variable frequency DC voltmeter (222) is taken from the positive pole (111) of the control bus, and is connected in series with the local and remote conversion switch (215); the negative charge of the variable frequency DC voltmeter (222) is taken from the negative pole (112) of the control bus, and is sequentially connected in series via a closing coil (212), a comprehensive protection device (213), a variable frequency limit switch (217), and a DCS variable frequency closing command (218).

2. A device for adding a closing monitoring circuit to a high-voltage switch cabinet circuit breaker according to claim 1, characterized in that: A 1P1A circuit breaker (219) and a DC monitoring voltmeter are added behind the local and remote conversion switch (215), and the local and remote conversion switch (215) is connected in series with the 1P1A circuit breaker (219) and the DC monitoring voltmeter.

3. A device for adding a closing monitoring circuit to a high-voltage switch cabinet circuit breaker according to claim 1, characterized in that: An energy storage limit switch (221) is arranged behind the closing coil (212) and the comprehensive protection device (213).

4. A device for adding a closing monitoring circuit to a high-voltage switch cabinet circuit breaker according to claim 1, characterized in that: A circuit breaker working position limit switch (220) is provided between the comprehensive protection device (213) and the power frequency limit switch (214).

5. A device for adding a closing monitoring circuit to a high-voltage switch cabinet circuit breaker according to claim 1, characterized in that: The display structure (3) comprises a circuit breaker closing operation indicator light (311), and the circuit breaker closing operation indicator light (311) is connected in series with a circuit breaker closing limit switch (312).

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