A small vacuum contactor for ring network cabinet

Abstract

The proposal of the present invention proposes a small vacuum contactor for a ring network cabinet, which relates to the technical field of electric power equipment, and includes a solid-sealed pole fixed on the ring network cabinet and a fuse arranged on the solid-sealed pole. The sealed pole is connected to the ring network cabinet through the upper mechanism board. The small vacuum contactor also includes an upper outlet copper bar arranged on the upper end of the solid-sealed pole. The other end of the arm is connected to the cam set on the upper mechanism plate through the connecting plate. A vacuum interrupter is provided in the solid-sealed pole. When the interrupter disconnection threshold is reached, the fuse is disconnected and the short-circuit protection is turned on. It has the technical advantages of effectively ensuring the safe and reliable operation of user load equipment.

Description

technical field [0001] The invention belongs to the technical field of electric equipment, in particular to a small vacuum contactor used for a ring network cabinet. Background technique [0002] The large motors (up to 10kV) used in power plants, chemicals, coal mines, etc., start and stop very frequently during operation. The circuit breaker in the motor system has a lifespan of only about 10,000 times, and the lifespan of the contactor is about 10,000 times. About 300,000 times, when the motor is frequently started, and the transformer and capacitor are frequently switched, the vacuum circuit breaker can break the short-circuit current, but cannot achieve frequent operation. [0003] Existing vacuum contactors can only be used with KYN28A-12 middle-mounted switch cabinets, and cannot be used with ring network cabinets (the vacuum contactor used in KYN28A-12 switch cabinets is a handcart type, with an overall dimension and width of about 470mm, while the ring network cabin...

AI Technical Summary

Problems solved by technology

[0002] The large motors (up to 10kV) used in power plants, chemicals, coal mines, etc., start and stop very frequently during operation. The circuit breaker in the motor system has a lifespan of only about 10,000 times, and the lifespan of the contactor is about 10,000 times. About 300,000 times, when the motor is frequently started, and the transformer and capacitor are frequently switched, the vacuum circuit breaker can break the short-circuit current, but cannot realize frequent operation

[0003] Existing vacuum contactors can only be used with KYN28A-12 middle-mounted switch cabinets, and cannot be used with ring network cabinets (the vacuum contactor used in KYN28A-12 switch cabinets is a handcart type, with an overall dimension and width of about 470mm, while the ring network cabinet The basic size and width of the cabinet is 375mm, and the outer dimension of 470mm cannot be installed at all), and sometimes the user cannot install a large switch cabinet due to the small area of ​​the power distribution room

This will cause the user's equipment to fail to operate normally and safely, or waste a lot of manpower and material resources during the operation.

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