CN217115621U - Control system for avoiding reclosing through comprehensive protection fault locking of high-voltage cabinet - Google Patents
Control system for avoiding reclosing through comprehensive protection fault locking of high-voltage cabinet Download PDFInfo
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- CN217115621U CN217115621U CN202123185606.1U CN202123185606U CN217115621U CN 217115621 U CN217115621 U CN 217115621U CN 202123185606 U CN202123185606 U CN 202123185606U CN 217115621 U CN217115621 U CN 217115621U
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- 230000000903 blocking effect Effects 0.000 claims description 8
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Abstract
The utility model discloses a high-voltage board comprehensive protection fault locking control system for avoiding reclosing, which comprises a high-voltage board, a microcomputer comprehensive protection device for monitoring and protecting the high-voltage board, and a fault locking mechanism, wherein the fault locking mechanism comprises a relay module, the normally closed two ends of the relay module are connected in series in a closing circuit of a circuit breaker, and the two ends of a coil of the relay module are respectively connected to a control bus through a PLC dry contact point and a locking key knob switch of the microcomputer comprehensive protection device; and the normally open two ends of the relay module are connected to the PLC dry contact in parallel. The utility model discloses a control system for preventing reclosing by comprehensive protection fault locking of a high-voltage cabinet, which utilizes the scheme of combining micro-machine comprehensive protection and electrical control to increase the self-locking function of a fault trigger signal and the resetting function of a manual key switch on the premise of normal function configuration of the micro-machine comprehensive protection; and normal switching-on control can be recovered only after the fault reason is manually and truly confirmed on site and manually reset.
Description
Technical Field
The utility model particularly relates to a high-voltage board is synthesized and is protected fault blocking and avoid control system of reclosing lock belongs to the high-voltage board and synthesizes and protect technical field.
Background
Most of the existing 10KV high-voltage cabinets adopt KYN28A-12 type centrally installed cabinets, and mainly comprise a vacuum circuit breaker, a micro-machine comprehensive protector, a mutual inductor, a grounding switch, a metering detection and display instrument and the like; the microcomputer comprehensive protection is mainly used for monitoring and protecting a power supply system, and when the comprehensive protection detects that a power supply device or a power supply loop has a fault and reaches a trip set value, a trip instruction is sent out, a fault line is quickly and effectively cut off, and the accident influence range is reduced; the existing microcomputer comprehensive storage has the following disadvantages: the tripping instruction of the microcomputer comprehensive protection is instantaneous action, and a reclosing loop of the vacuum circuit breaker cannot be latched and disconnected continuously; under the condition that a production post worker does not confirm the fault reason, the operation of reclosing (even multiple times) again exists, and the fault line accident range is enlarged.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a high-voltage board synthesizes and protects fault blocking and avoids control system of reclosing lock on not influencing and synthesize the reliable protection logic control function that protects normally, successfully effectual perfected artifical affirmation, reset function, thoroughly avoided reclosing lock maloperation under the fault condition.
The utility model discloses a high-voltage board comprehensive protection fault blocking avoids control system of reclosing lock, including the high-voltage board, and be used for the microcomputer comprehensive protection of high-voltage board monitoring and protection, still include fault blocking mechanism, fault blocking mechanism includes the relay module, relay module normal close both ends concatenate in the circuit breaker combined floodgate return circuit, relay module coil both ends are respectively through the PLC dry contact and the locking key knob switch of microcomputer comprehensive protection and receive on the control bus; and the normally open two ends of the relay module are connected to the PLC dry contact in parallel.
When the micro-machine comprehensive protection device is used, when the micro-machine comprehensive protection device detects that the power supply equipment or the power supply loop has a fault and reaches a trip set value, a trip instruction is sent out to quickly and effectively cut off a fault line, and at the moment, a PLC (programmable logic controller) dry contact is firstly switched on and then switched off to realize fault trip output; when the PLC dry contact is switched on, the coil of the relay module is electrified, the normally open end of the relay module is closed, at the moment, the relay completes self-locking, namely after the dry contact is switched off, the coil is continuously electrified by utilizing the normally open contact of the relay, and the contact keeps closed; when the normally open end of the relay module is closed, the normally closed end of the relay module is opened, and the normally closed end of the relay module is connected in series with the closing loop of the circuit breaker, when the normally closed end of the relay module is opened, the closing loop of the circuit breaker is in an open circuit state, and at the moment, even if manual closing is carried out, the loop is still in the open circuit state, so that reclosing can be avoided; when production post personnel are confirming under the condition of fault reason, through rotating shutting key knob switch, shutting key knob switch is opened, and this moment, relay module power supply circuit is broken off, and the relay module loses the electricity, and the relay module open end that normally opens breaks off, and relay module closed end that normally closes, and this moment, circuit breaker combined floodgate return circuit can realize closing a floodgate to the circuit breaker.
Furthermore, a cabinet door of the high-voltage cabinet is provided with a mounting hole, and the locking key knob switch is embedded and fixed on the mounting hole.
Further, the relay module is installed on the inner side of the high-voltage cabinet secondary instrument room.
Compared with the prior art, the control system for preventing reclosing by comprehensive protection fault locking of the high-voltage cabinet utilizes the scheme of combining micro comprehensive protection and electrical control, and increases the self-locking function of the fault trigger signal and the resetting function of the manual key switch on the premise of normal function configuration of the micro comprehensive protection; through relay self-locking, fault signals are continuously output, and repeated switching-on is ensured not to occur; by adding the manual reset key switch, normal switching-on control can be recovered only after the fault reason is confirmed manually and really on site and the manual reset is carried out.
Drawings
Fig. 1 is the utility model discloses a high-voltage board circuit breaker and circuit breaker combined floodgate return circuit connection structure schematic diagram.
Fig. 2 is the utility model discloses a circuit breaker combined floodgate return circuit auto-lock control structure schematic diagram.
Detailed Description
Example 1:
the control system for preventing reclosing of the comprehensive protection fault locking of the high-voltage cabinet shown in fig. 1 and fig. 2 comprises the high-voltage cabinet, a microcomputer comprehensive protection device for monitoring and protecting the high-voltage cabinet, and a fault locking mechanism, wherein the fault locking mechanism comprises a relay module KA, normally closed two ends KA2 of the relay module are connected in series in a closing loop S of a circuit breaker, and two ends of a coil KA1 of the relay module are respectively connected to a control bus + KM-KM through a PLC trunk joint 427 and 428 of the microcomputer comprehensive protection device and a locking key knob switch 3 FA; the normally open ends KA1 of the relay module are connected in parallel with the PLC main contacts 427, 428.
When the micro-machine comprehensive protection device is used, when the micro-machine comprehensive protection device detects that the power supply equipment or the power supply loop has a fault and reaches a trip set value, a trip instruction is sent out to quickly and effectively cut off a fault line, and at the moment, a PLC (programmable logic controller) dry contact is firstly switched on and then switched off to realize fault trip output; when the PLC dry contact is switched on, the coil of the relay module is electrified, the normally open end of the relay module is closed, at the moment, the relay completes self-locking, namely after the dry contact is switched off, the coil is continuously electrified by utilizing the normally open contact of the relay, and the contact keeps closed; when the normally open end of the relay module is closed, the normally closed end of the relay module is opened, and the normally closed end of the relay module is connected in series with the closing loop of the circuit breaker, when the normally closed end of the relay module is opened, the closing loop of the circuit breaker is in an open circuit state, and at the moment, even if manual closing is carried out, the loop is still in the open circuit state, so that reclosing can be avoided; when the production post personnel under the condition of confirming the fault reason, through rotating shutting key knob switch, shutting key knob switch is opened, this moment, relay module power supply circuit is disconnected, the relay module loses the electricity, the disconnection of the relay module normal open end, relay module normal close end KA2 is closed, at this moment, circuit breaker combined floodgate return circuit can realize closing to the circuit breaker, the coil KM of circuit breaker gets electric, thereby make the auxiliary contact KM2 and the main contact KM1 of circuit breaker obtain the closure, at this moment, the circuit breaker realizes closing.
The cabinet door of the high-voltage cabinet is provided with a mounting hole, and the locking key knob switch 3FA is embedded and fixed on the mounting hole. The relay module is installed on the inner side of the secondary instrument chamber of the high-voltage cabinet.
The above-mentioned embodiment is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles of the present invention are included in the claims of the present invention.
Claims (3)
1. The utility model provides a high-voltage board is synthesized and is protected control system that fault blocking avoided reclosing, includes the high-voltage board, and is used for the little machine of high-voltage board monitoring and protection to synthesize guarantor, its characterized in that: the circuit breaker further comprises a fault locking mechanism, wherein the fault locking mechanism comprises a relay module, the normally closed two ends of the relay module are connected in series in a closing loop of the circuit breaker, and the two ends of a coil of the relay module are connected to a control bus in parallel through a PLC (programmable logic controller) dry contact of a micro-machine comprehensive protection and a locking key knob switch respectively; and the normally open two ends of the relay module are connected to the PLC dry contact in parallel.
2. The control system for the comprehensive protection of the fault blocking and reclosing avoidance of the high-voltage cabinet according to claim 1, characterized in that: the cabinet door of the high-voltage cabinet is provided with a mounting hole, and the locking key knob switch is embedded and fixed on the mounting hole.
3. The control system for the comprehensive protection of the fault blocking and reclosing avoidance of the high-voltage cabinet according to claim 1, characterized in that: the relay module is installed on the inner side of the secondary instrument chamber of the high-voltage cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123185606.1U CN217115621U (en) | 2021-12-17 | 2021-12-17 | Control system for avoiding reclosing through comprehensive protection fault locking of high-voltage cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123185606.1U CN217115621U (en) | 2021-12-17 | 2021-12-17 | Control system for avoiding reclosing through comprehensive protection fault locking of high-voltage cabinet |
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| CN217115621U true CN217115621U (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123185606.1U Active CN217115621U (en) | 2021-12-17 | 2021-12-17 | Control system for avoiding reclosing through comprehensive protection fault locking of high-voltage cabinet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116538064A (en) * | 2023-03-02 | 2023-08-04 | 安阳钢铁股份有限公司 | Novel control method of high-pressure nitrogen compressor |
-
2021
- 2021-12-17 CN CN202123185606.1U patent/CN217115621U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116538064A (en) * | 2023-03-02 | 2023-08-04 | 安阳钢铁股份有限公司 | Novel control method of high-pressure nitrogen compressor |
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