CN215771934U - Spare power automatic switching circuit for manual brake-separating locking of medium voltage cabinet - Google Patents
Spare power automatic switching circuit for manual brake-separating locking of medium voltage cabinet Download PDFInfo
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- CN215771934U CN215771934U CN202121234896.1U CN202121234896U CN215771934U CN 215771934 U CN215771934 U CN 215771934U CN 202121234896 U CN202121234896 U CN 202121234896U CN 215771934 U CN215771934 U CN 215771934U
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- breaker
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Abstract
A medium voltage cabinet manual brake-separating locking spare power automatic switching circuit comprises a power inlet circuit breaker DL1 switch cabinet 1 and a power inlet circuit breaker DL2 switch cabinet 2, a bus coupler circuit breaker DL3 switch cabinet 3 is connected and arranged between the power inlet circuit breaker DL1 switch cabinet 1 and the power inlet circuit breaker DL2 switch cabinet 2, the power inlet circuit breaker DL1 switch cabinet 1 is connected with an IM spare power automatic switching device BZT1, the power inlet circuit breaker DL2 switch cabinet 2 is connected with the IM spare power automatic switching device BZT2, and a power supply end of the power inlet circuit breaker DL1 switch cabinet 1 is connected with a power supply I; the power supply end of the power supply inlet circuit breaker DL2 switch cabinet 2 is connected with a power supply II. The utility model aims to solve the technical problems that in the switching operation process of operators, if the spare power automatic switching device is not quitted, the spare power automatic switching device can be automatically switched into a spare power supply to recover the bus voltage after the bus is subjected to voltage loss, and serious personal casualties and equipment damage accidents are easily caused.
Description
Technical Field
The utility model belongs to the technical field of power devices and equipment, and particularly relates to a medium voltage cabinet manual opening and locking spare power automatic switching circuit.
Background
The power regulation specification requires that a factory power supply of a power plant and a power supply used by a substation are provided with an automatic switching-in device of a standby power supply, when the voltage of a working power supply disappears no matter what reason, the automatic switching-in device acts except a locking signal, in a factory power system communicated with a medium-voltage cabinet, when a bus is subjected to voltage loss due to bus failure, a circuit breaker protection action signal is generally used for locking a spare power automatic switching-in action, and when the bus is subjected to voltage loss due to manual operation of the circuit breaker, an operator generally takes measures to manually withdraw the spare power automatic switching-in the switching operation process to prevent the spare power automatic switching-in action;
when emergency occurs on site, if the backup power automatic switching device is not withdrawn in the process of manually breaking the circuit breaker on site, the backup power automatic switching device can be automatically switched into a backup power supply to recover the bus voltage after the bus is subjected to voltage loss, and serious personal injuries and equipment damage accidents are inevitably caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that in the switching operation process of operators, if the spare power automatic switching device is not quitted, the spare power automatic switching device can be automatically switched into a spare power supply to recover the bus voltage after the bus is subjected to voltage loss, and serious personal casualties and equipment damage accidents are easily caused.
A medium voltage cabinet manual brake-separating locking spare power automatic switching circuit comprises a power inlet circuit breaker DL1 switch cabinet 1 and a power inlet circuit breaker DL2 switch cabinet 2, a bus coupler circuit breaker DL3 switch cabinet 3 is connected and arranged between the power inlet circuit breaker DL1 switch cabinet 1 and the power inlet circuit breaker DL2 switch cabinet 2, the power inlet circuit breaker DL1 switch cabinet 1 is connected with an IM spare power automatic switching device BZT1, the power inlet circuit breaker DL2 switch cabinet 2 is connected with the IM spare power automatic switching device BZT2, and a power supply end of the power inlet circuit breaker DL1 switch cabinet 1 is connected with a power supply I; the power supply end of the power supply inlet circuit breaker DL2 switch cabinet 2 is connected with a power supply II.
A manual opening handle K1 is arranged in a switch cabinet 1 of the power incoming line breaker DL1, and an opening state contact K1-1 of the manual opening handle K1 is connected in series with a normally closed contact S1-1 of a working position S1 of the breaker DL1 and then is connected to a locking of an IM backup power automatic switching device BZT1 to be switched into a power supply.
A manual opening handle K2 is arranged in a switch cabinet 2 of the power incoming line breaker DL2, and an opening state contact K2-1 of the manual opening handle K2 is connected in series with a normally closed contact S2-1 of a working position S2 of the breaker DL2 and then is connected with a locking of a II M spare power automatic switching device BZT2 to be switched into a power supply.
A manual opening handle K3 is arranged in the switch cabinet 3 of the bus tie breaker DL3, and an opening state contact K3-1 of the manual opening handle K3 is connected in series with a normally closed contact S3-1 of the working position S3 of the bus tie breaker DL3 and then is connected with a locking switch-on power supply of the IM spare power automatic switching device BZT 1.
A manual opening handle K3 is arranged in the switch cabinet of the bus tie breaker DL3, and an opening state contact K3-2 of the manual opening handle K3 is connected in series with a normally closed contact S3-2 of the working position S3 of the bus tie breaker DL3 and then is connected to a locking switch of the IIM spare power automatic switching device BZT2 to be switched into a power supply.
Compared with the prior art, the utility model has the following technical effects:
according to the utility model, a contact signal of a manual opening and closing handle of the circuit breaker and a contact signal of a working position of the circuit breaker are connected in series and then sent to the spare power automatic switching device to be opened, when the circuit breaker runs at the working position and the circuit breaker is manually operated manually, the contacts are connected in series to conduct the spare power automatic switching device and enable the spare power automatic switching device to be withdrawn, when the switch is at the test position for maintenance, the normal operation of the spare power automatic switching device is not influenced in the test process of manually operating the circuit breaker, the problem that the spare power automatic switching device is not withdrawn to cause personal injury or equipment damage safety accidents when emergency opening is caused by reasons such as management or safety measures are not in place is solved, and the intrinsic safety management of equipment is realized;
the utility model adopts the technical scheme that a contact signal of a manual on-off operation handle of the circuit breaker and a contact signal of a working position of the circuit breaker are serially connected and then are sent to the spare power automatic switching device to be locked and opened into a loop, thereby realizing two functions: when the circuit breaker operates at the working position, the automatic switching device can be closed and withdrawn by manually operating the circuit breaker, and when the circuit breaker is at the test position, the normal operation of the automatic switching device can not be influenced by manually operating the circuit breaker for testing.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a circuit diagram of the present invention.
Detailed Description
As shown in fig. 1, a medium voltage cabinet manual opening blocking spare power automatic switching circuit comprises a power incoming breaker DL1 switch cabinet 1 and a power incoming breaker DL2 switch cabinet 2, a female coupler breaker DL3 switch cabinet 3 is connected and arranged between the power incoming breaker DL1 switch cabinet 1 and the power incoming breaker DL2 switch cabinet 2, the power incoming breaker DL1 switch cabinet 1 is connected with an IM spare power automatic switching device BZT1, the power incoming breaker DL2 switch cabinet 2 is connected with an IM spare power automatic switching device BZT2, and a power supply end of the power incoming breaker DL1 switch cabinet 1 is connected with a power supply I; the power supply end of the power supply inlet circuit breaker DL2 switch cabinet 2 is connected with a power supply II.
A manual opening handle K1 is arranged in a switch cabinet 1 of the power incoming line breaker DL1, and an opening state contact K1-1 of the manual opening handle K1 is connected in series with a normally closed contact S1-1 of a working position S1 of the breaker DL1 and then is connected to a locking of an IM backup power automatic switching device BZT1 to be switched into a power supply.
A manual opening handle K2 is arranged in a switch cabinet 2 of the power incoming line breaker DL2, and an opening state contact K2-1 of the manual opening handle K2 is connected in series with a normally closed contact S2-1 of a working position S2 of the breaker DL2 and then is connected with a locking of a II M spare power automatic switching device BZT2 to be switched into a power supply.
A manual opening handle K3 is arranged in the switch cabinet 3 of the bus tie breaker DL3, and an opening state contact K3-1 of the manual opening handle K3 is connected in series with a normally closed contact S3-1 of the working position S3 of the bus tie breaker DL3 and then is connected with a locking switch-on power supply of the IM spare power automatic switching device BZT 1.
A manual opening handle K3 is arranged in the switch cabinet of the bus tie breaker DL3, and an opening state contact K3-2 of the manual opening handle K3 is connected in series with a normally closed contact S3-2 of the working position S3 of the bus tie breaker DL3 and then is connected to a locking switch of the IIM spare power automatic switching device BZT2 to be switched into a power supply.
The utility model connects the contact signal of the manual on-off operation handle of the circuit breaker with the contact signal of the working position of the circuit breaker in series and then sends the signal to the spare power automatic switching device to be locked and opened into a loop, when the circuit breaker runs at the working position, the circuit breaker is manually operated to open the circuit breaker to cause the voltage loss of a bus, the spare power automatic switching device is withdrawn after being locked to prevent the potential safety hazard to equipment and personnel caused by the voltage recovery of the bus caused by the input of a spare power supply, when the circuit breaker is at the test position, the circuit breaker is manually operated to not send a locking signal to the spare power automatic switching device in the test process, the normal operation of the spare power automatic switching device is prevented from being influenced by the routine maintenance test of the circuit breaker, the problems of personal injury or equipment damage safety accidents caused by the non-withdrawal of the spare power automatic switching device when the emergency opening is caused by the reasons of improper management or safety measures and the like are solved, and the essential safety management of equipment facilities is realized.
The working condition I is as follows: IM, IIM are supplied power by power I, power II separately, mother connected breaker DL3 is in maintenance state, namely power incoming line breaker DL1, power incoming line breaker DL2 are operated at working positions, mother connected breaker DL3 is in test position, when power incoming line breaker DL1 carries out manual opening operation, manual opening and closing handle K1 contact signal K1-1 and breaker DL1 working position S1 contact signal S1-1 are closed, the serial contact is conducted and sent to the spare power automatic switching device BZT1 to be locked and make it exit; when the power incoming line breaker DL2 executes manual opening and closing operation, a contact signal K2-1 of a manual opening and closing handle K2 and a contact signal S2-1 of a working position S2 of the breaker DL2 are both closed, and a serial contact is conducted and sent to a backup power automatic switching device BZT2 for locking and withdrawing; when the bus tie breaker DL3 is in a maintenance state and is used for a manual opening and closing test, the manual opening and closing handle K3 contact signals K3-1 and K3-2 are closed, the S3 contact signals S3-1 and S3-2 of the working position of the breaker DL3 are disconnected, the series signal contacts are not conducted, and the normal operation of the backup power automatic switching device BZT1 and BZT2 is not influenced.
Working conditions are as follows: IM is supplied with power by a power supply I alone, II M is supplied with power by I M, a power incoming line breaker DL2 is in an overhaul state, namely, the power incoming line breaker DL1 and a female circuit breaker DL3 operate at working positions, the power incoming line breaker DL2 is at a test position, when the power incoming line breaker DL1 executes manual brake opening operation, a contact signal K1-1 of a manual opening and closing handle K1 and a contact signal S1-1 of a working position S1 of the circuit breaker DL1 are both closed, and a series contact is conducted and is sent to a backup power automatic switching device BZT1 to be locked and enable the backup power automatic switching device to exit; when the bus tie breaker DL3 executes manual opening and closing operation, manual opening and closing handles K3 contact signals K3-1 and K3-2 and breaker DL3 working position S3 contact signals S3-1 and S3-2 are closed, and serial contact conduction is transmitted to the backup power automatic switching devices BZT1 and BZT2 for locking and withdrawing; when the power incoming line breaker DL2 is in a maintenance state and is used for a manual opening and closing test, a manual opening and closing handle K2 contact signal K2-1 is closed, a breaker DL2 working position S2 contact signal S2-1 is disconnected, a series signal contact is not conducted, and the normal operation of the backup power automatic switching device BZT2 is not influenced.
Working conditions are as follows: the IIM is independently powered by a power supply II, the IM is powered by the IIM, a power incoming line breaker DL1 is in an overhauling state, namely, a power incoming line breaker DL2 and a female connection breaker DL3 run at working positions, a power incoming line breaker DL1 is at a test position, when the power incoming line breaker DL2 performs manual brake opening operation, a manual opening and closing handle K2 contact signal K2-1 and a breaker DL2 working position S2 contact signal S2-1 are both closed, and a series connection contact is conducted and sent to a backup power automatic switching device BZT2 to be locked and enable the backup power automatic switching device to exit; when the bus tie breaker DL3 executes manual opening and closing operation, manual opening and closing handles K3 contact signals K3-1 and K3-2 and breaker DL3 working position S3 contact signals S3-1 and S3-2 are closed, and serial contact conduction is transmitted to the backup power automatic switching devices BZT1 and BZT2 for locking and withdrawing; when the power incoming line breaker DL1 is in a maintenance state and is used for a manual opening and closing test, a manual opening and closing handle K1 contact signal K1-1 is closed, a breaker DL1 working position S1 contact signal S1-1 is disconnected, a series signal contact is not conducted, and the normal operation of the backup power automatic switching device BZT1 is not influenced.
The utility model connects the contact signal of the manual on-off handle of the circuit breaker with the contact signal of the working position of the circuit breaker in series and then sends the signal to the spare power automatic switching device to switch on, when the circuit breaker runs at the working position and the circuit breaker on-off handle is manually operated manually, the contacts are connected in series to conduct the spare power automatic switching device and withdraw the spare power automatic switching device, when the switch is at the testing position for maintenance, the normal operation of the spare power automatic switching device is not influenced in the testing process of manually operating the circuit breaker, the problem of personal injury or equipment damage safety accident caused by the spare power automatic switching device not withdrawing when the emergency switching-off is carried out due to the reasons of management or safety measures not in place is solved, and the intrinsic safety management of equipment is realized.
Claims (5)
1. A medium voltage cabinet manual brake-separating locking spare power automatic switching loop is characterized by comprising a power inlet circuit breaker DL1 switch cabinet (1) and a power inlet circuit breaker DL2 switch cabinet (2), wherein a bus coupler circuit breaker DL3 switch cabinet (3) is connected and arranged between the power inlet circuit breaker DL1 switch cabinet (1) and the power inlet circuit breaker DL2 switch cabinet (2), the power inlet circuit breaker DL1 switch cabinet (1) is connected with an IM spare power automatic switching device BZT1, the power inlet circuit breaker DL2 switch cabinet (2) is connected with the IM spare power automatic switching device BZT2, and a power supply end of the power inlet circuit breaker DL1 switch cabinet (1) is connected with a power supply I; the power supply end of the power supply inlet wire breaker DL2 switch cabinet (2) is connected with a power supply II.
2. The circuit of the medium voltage cabinet manual opening blocking spare power automatic switching device as claimed in claim 1, characterized in that a power inlet breaker DL1 switch cabinet (1) is provided with a manual opening handle K1, and an opening state contact K1-1 of the manual opening handle K1 is connected in series with a normally closed contact S1-1 of a working position S1 of the breaker DL1 and then is connected to a blocking opening power supply of the IM spare power automatic switching device BZT 1.
3. The medium voltage cabinet manual opening blocking spare power automatic switching circuit according to claim 1 or 2, characterized in that a manual opening handle K2 is arranged in a power incoming breaker DL2 switch cabinet (2), and an opening state contact K2-1 of a manual opening handle K2 is connected in series with a normally closed contact S2-1 of a working position S2 of the breaker DL2 and then is connected to a blocking opening power supply of an IIM spare power automatic switching device BZT 2.
4. The medium voltage cabinet manual opening blocking spare power automatic switching circuit according to claim 3, characterized in that a manual opening handle K3 is arranged in a switch cabinet (3) of the bus tie breaker DL3, and an opening state contact K3-1 of a manual opening handle K3 is connected in series with a normally closed contact S3-1 of a working position S3 of the bus tie breaker DL3 and then is connected to a blocking and switching power supply of an IM spare power automatic switching device BZT 1.
5. The circuit of manual opening blocking spare power automatic switching device of medium voltage cabinet as claimed in claim 4, wherein the bus tie breaker DL3 switch cabinet is provided with a manual opening handle K3, and the opening state contact K3-2 of the manual opening handle K3 is connected in series with the normally closed contact S3-2 of the working position S3 of the bus tie breaker DL3 and then is connected to the blocking switch-on power supply of the IIM spare power automatic switching device BZT 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121234896.1U CN215771934U (en) | 2021-06-03 | 2021-06-03 | Spare power automatic switching circuit for manual brake-separating locking of medium voltage cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121234896.1U CN215771934U (en) | 2021-06-03 | 2021-06-03 | Spare power automatic switching circuit for manual brake-separating locking of medium voltage cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215771934U true CN215771934U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121234896.1U Active CN215771934U (en) | 2021-06-03 | 2021-06-03 | Spare power automatic switching circuit for manual brake-separating locking of medium voltage cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215771934U (en) |
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2021
- 2021-06-03 CN CN202121234896.1U patent/CN215771934U/en active Active
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