CN220822622U - Motor protection circuit of GIS circuit breaker - Google Patents
Motor protection circuit of GIS circuit breaker Download PDFInfo
- Publication number
- CN220822622U CN220822622U CN202322595689.4U CN202322595689U CN220822622U CN 220822622 U CN220822622 U CN 220822622U CN 202322595689 U CN202322595689 U CN 202322595689U CN 220822622 U CN220822622 U CN 220822622U
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- relay
- contact
- motor
- coil
- circuit
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- 238000004146 energy storage Methods 0.000 abstract description 9
- 230000005611 electricity Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Keying Circuit Devices (AREA)
Abstract
The utility model relates to a motor protection loop of a GIS circuit breaker, which comprises a circuit breaker motor loop, a relay KM and a time relay KT, wherein the relay KM is respectively provided with an A1/A2 coil contact and two pairs of auxiliary contacts of L1/T1 and L2/T2, and the time relay KT is provided with A2/7 coil contact and A1/4 time delay contact; the two coil contacts A1/A2 of the relay KM are in power failure synchronization with the two auxiliary contacts L1/T1 and L2/T2 of the relay KM, the 2/7 coil contact of the time relay KT is in power failure synchronization with the 1/4 auxiliary contact of the relay KT, the coil contact A1 of the relay KM is connected with a travel switch of a motor, the coil contact A2 is connected with a delay normally closed contact of the time relay KT, and the auxiliary contacts L1/T1 and L2/T2 of the relay KM are respectively connected with a live wire and a zero wire of a motor loop. The circuit can prevent the damage of the energy storage of the breaker motor to the breaker motor, so that the operation of the equipment is safer and more reliable, the circuit has extremely high practicability, and the requirement of equipment overhaul is met.
Description
Technical Field
The utility model relates to the technical field of SF 6 gas-insulated metal-enclosed switchgear, in particular to a motor protection loop of a GIS breaker.
Background
At present, when the GIS circuit breaker motor loop is used for motor energy storage, the phenomenon that an energy storage in-place travel switch cannot be always disconnected is likely to occur, an intermediate relay is always powered on, the motor is always rotated, overload damage of the motor can be caused for a long time, faults cannot be timely cut off, and hidden danger is caused for safe operation.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides the motor protection circuit of the GIS breaker, perfects the protection circuit of the motor of the GIS breaker, ensures that the equipment is safer and more reliable to operate, has extremely high practicability and meets the requirement of equipment overhaul.
The utility model is realized by the following technical scheme:
The motor protection circuit of the GIS breaker comprises a motor circuit of the breaker, a relay KM and a time relay KT,
The relay KM is provided with an A1/A2 coil contact and two pairs of auxiliary contacts L1/T1 and L2/T2 respectively, and the time relay KT is provided with A2/7 coil contact and A1/4 delay contact;
the two coil contacts A1/A2 of the relay KM are synchronously powered off and powered on with the two auxiliary contacts L1/T1 and L2/T2 of the relay KM, the 2/7 coil contact of the time relay KT is synchronously powered off and powered on and powered off with the 1/4 auxiliary contact of the relay KT, the coil contact A1 of the relay KM is connected with a travel switch of a motor, the coil contact A2 is connected with a delay normally closed contact of the time relay KT, and the auxiliary contacts L1/T1 and L2/T2 of the relay KM are respectively connected with a live wire and a zero wire of a motor loop.
Further, the coil contacts A1 and A2 of the relay KM and the auxiliary contacts L1/T1 and L2/T2 of the relay KM are connected in the GIS control cabinet through terminal bars.
Further, the 2/7 coil contact of the time relay KT and the 1/4 auxiliary contact of the time relay KT are connected in the GIS control cabinet through terminal bars.
The utility model has the beneficial effects that:
According to the utility model, the coil and the normally-closed time-delay contact of the time relay are added into the original loop, when the motor of the motor breaker stores energy, the breaker mechanism is not in place, the coil KM is always electrified, the coil of the time relay KT is electrified and started at the same time, if the motor loop does not store energy yet after 180 seconds, the normally-closed time-delay contact of the time relay KT is disconnected, the coil KM is powered off at the same time, the normally-open auxiliary contact of the KM is disconnected at the same time, and the motor loop is powered off, so that the energy storage of the motor is not overtime, and the equipment can run safely.
The protection circuit of the GIS breaker motor effectively prevents the breaker motor from being damaged by the energy storage of the breaker motor, perfects the protection circuit of the GIS breaker motor, ensures that the equipment is safer and more reliable to operate, has extremely high practicability, and meets the requirement of equipment overhaul.
Drawings
Fig. 1 is a prior art knife switch control circuit diagram.
Fig. 2 is a schematic circuit structure of the present utility model.
The figure shows:
1. relay KM,2, time relay KT.
Detailed Description
In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.
The utility model provides a GIS circuit breaker's motor protection circuit, includes circuit breaker motor circuit, still includes relay KM1 and time relay KT2, and relay KM1 has two pairs of auxiliary contacts of A1/A2 coil contact and L1/T1, L2/T2 respectively, and time relay KT2 has 2/7 coil contact and 1/4 time delay contact.
The two coil contacts A1/A2 of the relay KM1 are synchronously with the power failure of the two auxiliary contacts L1/T1 and L2/T2 of the relay KM1, the 2/7 coil contact of the time relay KT2 is synchronously with the power failure of the 1/4 auxiliary contact of the relay KT2, the coil contact A1 of the relay KM1 is connected with a travel switch of a motor, the coil contact A2 is connected with a delay normally closed contact of the time relay KT2, and the auxiliary contacts L1/T1 and L2/T2 of the relay KM1 are respectively connected with a live wire and a zero wire of a motor loop.
The coil contacts A1 and A2 of the relay KM1 and the auxiliary contacts L1/T1 and L2/T2 of the relay KM1 are connected in the GIS control cabinet through terminal bars.
The 2/7 coil contact of the time relay KT2 and the 1/4 auxiliary contact of the time relay KT2 are connected in the GIS control cabinet through terminal bars.
Through adding time relay's coil and normal close time delay contact in original return circuit, when motor circuit breaker motor is in energy storage, circuit breaker mechanism is not in place always, coil KM is always electric, time relay KT2 coil gets electric start simultaneously, after 180 seconds the motor return circuit if the energy storage has not been accomplished yet, time relay KT 2's normal close time delay contact then opens, coil KM also loses the electricity simultaneously, KM's normally open auxiliary contact also opens simultaneously, motor return circuit loses the electricity, thereby energy storage timeout can not appear in the motor, make equipment can safe operation, effectually prevent the damage that the circuit breaker motor energy storage surpassed the circuit breaker motor and caused, the protection return circuit of GIS circuit breaker motor has been perfected, make equipment operation safe and reliable more, the demand when having high practicality, the equipment is overhauld.
Of course, the above description is not limited to the above examples, and the technical features of the present utility model that are not described may be implemented by or by using the prior art, which is not described herein again; the above examples and drawings are only for illustrating the technical scheme of the present utility model and not for limiting the same, and the present utility model has been described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present utility model and the scope of the appended claims.
Claims (3)
1. The utility model provides a motor protection circuit of GIS circuit breaker, includes circuit breaker motor circuit, its characterized in that: also comprises a relay KM and a time relay KT,
The relay KM is provided with an A1/A2 coil contact and two pairs of auxiliary contacts L1/T1 and L2/T2 respectively, and the time relay KT is provided with A2/7 coil contact and A1/4 delay contact;
the two coil contacts A1/A2 of the relay KM are synchronously powered off and powered on with the two auxiliary contacts L1/T1 and L2/T2 of the relay KM, the 2/7 coil contact of the time relay KT is synchronously powered off and powered on and powered off with the 1/4 auxiliary contact of the relay KT, the coil contact A1 of the relay KM is connected with a travel switch of a motor, the coil contact A2 is connected with a delay normally closed contact of the time relay KT, and the auxiliary contacts L1/T1 and L2/T2 of the relay KM are respectively connected with a live wire and a zero wire of a motor loop.
2. The motor protection circuit of a GIS circuit breaker according to claim 1, wherein: the coil contacts A1 and A2 of the relay KM and the auxiliary contacts L1/T1 and L2/T2 of the relay KM are connected in the GIS control cabinet through terminal bars.
3. The motor protection circuit of a GIS circuit breaker according to claim 1, wherein: the 2/7 coil contact of the time relay KT and the 1/4 auxiliary contact of the time relay KT are connected in the GIS control cabinet through terminal blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322595689.4U CN220822622U (en) | 2023-09-25 | 2023-09-25 | Motor protection circuit of GIS circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322595689.4U CN220822622U (en) | 2023-09-25 | 2023-09-25 | Motor protection circuit of GIS circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220822622U true CN220822622U (en) | 2024-04-19 |
Family
ID=90699686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322595689.4U Active CN220822622U (en) | 2023-09-25 | 2023-09-25 | Motor protection circuit of GIS circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220822622U (en) |
-
2023
- 2023-09-25 CN CN202322595689.4U patent/CN220822622U/en active Active
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