CN216672885U

CN216672885U - High-voltage motor fault tripping locking restarting loop

Info

Publication number: CN216672885U
Application number: CN202220026526.7U
Authority: CN
Inventors: 张灵毅; 唐汪生; 代东峰
Original assignee: Anhui Jinmei Zhongneng Chemical Co Ltd
Current assignee: Xinjiang Zhongneng Wanyuan Chemical Co ltd
Priority date: 2022-01-07
Filing date: 2022-01-07
Publication date: 2022-06-03
Anticipated expiration: 2032-01-07

Abstract

The utility model relates to the technical field of circuit control, and particularly discloses a high-voltage motor fault tripping locking restarting loop; two ends of a power supply control circuit are connected with a locking loop in parallel, a transfer switch KK and a voltage type intermediate relay BCJ are arranged in the locking loop, a pair of contacts 11 and 12 of the transfer switch KK are arranged in the loop, a coil in the voltage type intermediate relay BCJ is connected in the loop in series, a normally open contact of the voltage type intermediate relay BCJ is connected in parallel to a tripping outlet joint of a microcomputer protection device, and a normally closed contact is connected in the motor closing loop in series; according to the utility model, a set of fault tripping locking restarting loop is added in the high-voltage motor control circuit, so that the high-voltage motor can not be switched on again after the protection device acts, and the phenomenon of accident enlargement caused by blind starting of the motor by an operator after the motor fault tripping is effectively avoided.

Description

High-voltage motor fault tripping locking restarting loop

Technical Field

The utility model relates to the technical field of circuit control, and particularly discloses a high-voltage motor fault tripping locking restarting loop.

Background

The high-voltage motor has the advantages of high efficiency, energy conservation, stable operation relative to a low-voltage motor and the like, is widely applied in chemical production, and is generally dragged by a high-voltage motor with the power of more than 200KW, namely a motor with the voltage level of 10KV or 6 KV.

The existing high-voltage motor inevitably has faults in the operation process, and can trip due to reasons such as overcurrent, grounding, overload and the like, because the microcomputer relay protection device is arranged on a high-voltage switch cabinet of a high-voltage chamber, and the microcomputer relay protection device is arranged in an electric control chamber in an integrated background (the specific existing high-voltage motor control circuit diagram can refer to figure 1, and sequentially comprises a power supply control circuit 100, a closing and opening circuit 200, a protection tripping circuit 300, an indication circuit 400 and a switch display device from top to bottom).

Above-mentioned high voltage motor control circuit's setting is because of the fault tripping when high voltage motor, can't know the reason of tripping at all as operating personnel the very first time, can't judge whether the mistake is tripped or the fault tripping, and operating personnel has a lucky psychology a bit, restarts the motor, if the motor is body fault tripping, restart can cause the enlargements of accident, in other words take the fault combined floodgate, and its consequence can be fairly serious, light then the motor damages, and the heavy then causes the electric wire netting collapse. Therefore, how to ensure that a set of fault tripping lockout restarting loop is additionally arranged after the motor trips is very effective, the accident caused by restarting of an operator after the high-voltage motor fault tripping can be avoided, the occurrence of the electrical safety accident is essentially ensured, and the powerful guarantee is provided for the safe and stable operation of chemical production.

SUMMERY OF THE UTILITY MODEL

The utility model aims to design a high-voltage motor fault tripping locking restarting loop capable of effectively solving the technical problems aiming at the defect that after the fault tripping of the existing high-voltage motor, an operator restarts the high-voltage motor unknowingly to easily expand accidents.

The utility model is realized by the following technical scheme:

the utility model provides a high voltage motor fault tripping shutting restart circuit, includes by the total control circuit that power control circuit, combined floodgate and separating brake return circuit, protection tripping circuit, instruction return circuit and switch display device constitute, its characterized in that the both ends of power control circuit increase the shutting return circuit, be provided with change over switch KK and intermediate relay BCJ in the shutting return circuit, a pair of contact 11, 12 of change over switch KK set up in the shutting return circuit, coil in the intermediate relay BCJ establishes ties in the shutting return circuit, the normally open contact of intermediate relay BCJ connects in parallel on the tripping outlet X6-4, X6-5 joint of microcomputer protection device in the instruction return circuit, and the normally closed contact establishes ties on X6-19, X7-7 joint of combined floodgate and separating brake return circuit.

According to the fault trip blocking restart loop of the high-voltage motor disclosed by the utility model, when the motor is in fault trip, the outlets X6-4 and X6-5 of the protector are closed, the relay at the trip position is electrified and sucked, the BCJ normally open contact is closed, and the closing loop is always in an open state, so that the motor can not be electrified and started even if a closing signal occurs, the motor is thoroughly ensured not to be electrified after being in fault trip, and the maintenance of the motor is ensured.

As a further arrangement of the above scheme, an indicator light HY is further arranged in the electrical loop, and the indicator light HY is connected in parallel at two ends of the coil in the intermediate relay BCJ.

Specifically, the intermediate relay BCJ is a voltage-type intermediate relay, and the coil voltage in the voltage-type intermediate relay BCJ is-220V.

Has the advantages that:

according to the utility model, a set of fault tripping and locking restarting loop is added in the high-voltage motor control circuit, and after tests, the high-voltage motor can not be switched on again after the action of the protection device, so that the phenomenon of accident enlargement caused by the blind starting of the motor by an operator after the fault tripping of the motor is effectively avoided, the occurrence of electrical safety accidents is essentially ensured, and the powerful guarantee is provided for the safe and stable operation of chemical production.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a control schematic diagram of a high voltage motor in the prior art;

fig. 2 is a control schematic diagram of the improved high-voltage motor of the utility model.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1-2, in conjunction with the embodiments.

Example 1

This embodiment 1 discloses a circuit for restarting a fault trip latch based on a conventional high-voltage motor control circuit, and a specific circuit for restarting a fault trip latch is shown in fig. 2.

The whole high-voltage motor control circuit is in the prior art, and referring to fig. 1, the whole high-voltage motor control circuit sequentially comprises a power supply control circuit 100, a closing and opening circuit 200, a protection tripping circuit 300, an indication circuit 400 and a switch display device from top to bottom in a general circuit schematic diagram. The power supply control circuit 100 consists of a control bus, a miniature circuit breaker and a control power supply, and the switching-on and switching-off loop 200 consists of circuits of test switching-on, manual switching-on, jumping position monitoring, remote control switching-on, remote control tripping, manual tripping, field tripping and field emergency stopping; the indication circuit 400 is composed of circuits for trip indication, field trip indication, closing indication, and field closing indication. Since the whole high-voltage motor control circuit design is the prior art, the whole high-voltage motor control circuit design is not described one by one, and can be read by referring to a circuit diagram in the attached figure 1.

The improvement of this embodiment 1 is that a set of fault trip blocking restart loop 500 is added at both ends of the power control circuit 100, and specifically, the circuit schematic diagram of the fault trip blocking restart loop 500 can refer to fig. 2, which includes a transfer switch KK, a voltage-type intermediate relay BCJ and an indicator light HY. The changeover switch KK is provided with a pair of contacts of 11 and 12 and is arranged in a locking restarting loop 500, then a coil of a voltage type intermediate relay BCJ is connected in series in the locking restarting loop 500, the coil voltage of the relay BCJ is-220V, a normally open contact of the relay BCJ is connected in parallel to a junction of trip outlets X6-4 and X6-5 of a microcomputer protection device in an indicating loop 400, a normally closed contact of the relay BCJ is connected in series to junctions of X6-19 and X7-7 of the microcomputer protection device in a closing loop 200, and finally an indicating lamp HY is connected in parallel to two ends of the coil of the relay BCJ.

In the operating state of the high-voltage motor, the contacts 11 and 12 on the changeover switch KK 501 are closed. When the motor trips due to faults, the trip outlets X6-4 and X6-5 are instantly closed, the coil 502 of the relay BCJ is electrified and self-protected, the BCJ normally-open contact 503 is closed, the intermediate relay BCJ is electrified and self-protected, the BCJ normally-closed contact 504 is always opened when being connected in series in the closing loop 200, the closing loop cannot be closed even when a closing signal is obtained, only an electrician is waited to find out reasons, the change-over switch KK is reset when the motor is ensured to be normal, and an operator can normally start the motor, so that accidents caused by restarting of the high-voltage motor due to faults on the premise that the operator does not know the tripping reasons are effectively avoided, the occurrence of electrical safety accidents is guaranteed essentially, and powerful guarantee is provided for safe and stable operation of chemical production.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a high-voltage motor fault tripping block restart circuit, includes by power control circuit, combined floodgate and separating brake return circuit, protection trip return circuit, instruction return circuit and switch display device constitution's total control circuit, its characterized in that, the both ends of power control circuit increase the block return circuit, be provided with change over switch KK and auxiliary relay BCJ in the block return circuit, a pair of contact 11, 12 of change over switch KK sets up in the block return circuit, the coil in auxiliary relay BCJ establishes ties in the block return circuit, auxiliary relay BCJ's normally open contact connects in parallel in the instruction return circuit on trip export X6-4, X6-5 joint of microcomputer protection device, normally closed contact establishes ties on combined floodgate and separating brake return circuit's X6-19, X7-7 joint.

2. The high-voltage motor fault trip lockout restart loop of claim 1, wherein an indicator light HY is further disposed in the lockout loop, and the indicator light HY is connected in parallel across the coil in the intermediate relay BCJ.

3. The high voltage motor fault trip lockout restart loop of claim 2 wherein the intermediate relay BCJ is a voltage mode intermediate relay and coil voltage in the voltage mode intermediate relay BCJ is-220V.