直流接触器厂家
Your current location : Home >> News >> Industry News

Contact UsContact Us

Shenyang Dongmu Electric Manufacturing Co., Ltd.

Tel: 024-86673439  86673266

MP: 18640159955  13804972258

Fax: 024-86671610  86673516

E-mail: sydmdq@126.com

Website:en.sydongmu.com

Add: Guanyin Development Zone, Yalujiang North Street, Yuhong District, Shenyang

Do you know the function of auxiliary switch in control system?

2020-07-15 H:36:03
second

The auxiliary switch is a part of the main switch, which is configured in high-voltage medium voltage circuit breaker, disconnector other electrical equipment as the opening, closing, signal control interlocking protection functions of the secondary control circuit, can also be used as combination switch transfer switch. The word "auxiliary" in the name of auxiliary switch is because it is an independent switch. It is a carrier of auxiliary breaking, connecting interlocking functions in the control system.

The function of the auxiliary contact of the disconnector is similar to that of the transfer switch. There are several normally open normally closed nodes, which change position with the opening closing state of the disconnector. In the bus differential protection, the protection device determines which bus bar each bay is hung on through the auxiliary contact, calculates the differential current correctly, so as to correctly the fault bus in case of fault in the bus area.

The function of the auxiliary switch of the disconnector is similar to that of the transfer switch. There are several normally open normally closed nodes that change position with the opening closing state of the disconnector. In the bus differential protection, the protection device determines which bus bar each bay is hung on through the auxiliary contact, calculates the differential current correctly, so as to correctly the fault bus in case of fault in the bus area.

The functions of disconnector are as follows:

1) After opening, a reliable insulation gap shall be established to separate the equipment line to be overhauled the power supply with an obvious disconnection point, so as to ensure the safety of maintenance personnel equipment.

2) According to the operation needs, change the line.

3) It can be used to separate close the small current in the line, such as the charging current of bushing, bus bar, connector short cable, the capacitance current of voltage sharing capacitor of switch, the circulating current of double bus connection the excitation current of voltage transformer.

4) According to the specific situation of different structure types, it can be used to open close the no-load excitation current of a certain capacity transformer.

Auxiliary switch


Label

Recent:

HOME  |  ABOUT  |  PRODUCTS  |  FACTORY  |  HONOR  |  NEWS  |  QUALITY  |  JOB  |  CONTACT