Auxiliary protection device for switching overvoltage of shunt reactor and use method

Abstract

The invention relates to the technical field of reactors, in particular to an auxiliary protection device for shunt reactor switching overvoltage and a using method.The auxiliary protection device comprises a mounting shell, a protection switch and a protector, the protector is connected to the inner wall of the mounting shell through a supporting assembly and arranged on one side of the protection switch, and a movable contact control block is arranged at the top of the protection switch; a connecting shell is arranged on the side, close to the protector, of the movable contact control block, the connecting shell and the movable contact control block are connected through a rotating shaft, a limiting groove is formed in the lower surface of the connecting shell, a contact metal arc plate is fixedly connected in the limiting groove and electrically connected with a movable contact in the protection switch, and a connecting contact is arranged above the protector and electrically connected with the movable contact in the protection switch. According to the auxiliary protection device, the auxiliary protection device and a protection switch can be synchronously connected into a circuit, the effect of protecting the circuit in time is achieved, and meanwhile normal work of the circuit can not be affected during replacement and maintenance.

Description

technical field [0001] The invention relates to the technical field of reactors, in particular to an auxiliary protection device for shunt reactor switching overvoltage and a use method thereof. Background technique [0002] Shunt reactors are mainly used for reactive power compensation in the power system. When the reactive power of the system changes, these reactors need to be switched in time. Many accidents caused by operating overvoltage occurred when switching shunt reactors. The commonly used overvoltage protection methods mainly include zinc oxide arresters, resistance-capacitance absorption circuits, and protection gaps. Gapless metal oxide surge arresters have inherent thermal stability problems. They will age due to repeated overvoltage, and eventually lose thermal stability and be damaged or explode under continuous operating voltage or overvoltage. In order to avoid the above problems, connect Protectors add further protection to the circuit. [0003] The prot...

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Problems solved by technology

[0003] The protector plays a protective role on the circuit. The existing method is to directly connect the protector to the circuit, which cannot timely control the breakout state of the protector. When the protector is damaged, it needs to be powered off and then replaced, which affects To the normal operation of the circuit, the protector is usually fixed by bolts during the installation process, and then the circuit is connected. The fixing process is time-consuming and laborious.

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