Zinc oxide lightning arrester in box-type substation, and use method thereof

Abstract

The invention relates to the technical field of box-type substation equipment, and discloses a zinc oxide arrester in a box-type substation. The arrester comprises an insulating sleeve, an epoxy glass fiber reinforced plastic cylinder is fixedly sleeved on the inner surface of the insulating sleeve, and a zinc oxide resistor disc is fixedly sleeved on the inner surface of the epoxy glass fiber reinforced plastic cylinder. According to the zinc oxide lightning arrester in the box-type substation, and a use method thereof, an upper cavity separated by a partition plate is pushed to move downwards under the thermal expansion effect, and negative pressure is generated after a rocker and a bevel gear drive a rotating shaft to rotate and a sealing plate rotates to exhaust air to absorb moisture in the cavity where the zinc oxide resistor disc is located, so that after the upper-end metal end loses efficacy, incoming moisture can be discharged intermittently and cannot be accumulated to accelerate aging damage of the zinc oxide resistor disc, meanwhile, after moisture absorption, air in a cavity where the zinc oxide resistor disc is located can be reduced, then air gaps are enlarged, and the situation that flashover is caused by air breakdown, and consequently the zinc oxide resistor disc is directly damaged is prevented, and the zinc oxide resistor disc can be normally used to reach the life limit.

Description

technical field [0001] The invention relates to the technical field of box-type substation equipment, in particular to a zinc oxide lightning arrester in a box-type substation and a method for using the same. Background technique [0002] The box-type substation is a factory prefabricated indoor and outdoor compact power distribution equipment that integrates the high-voltage switchgear, distribution transformer and low-voltage power distribution device according to a certain wiring scheme, that is, high-voltage power receiving, transformer step-down, low-voltage distribution Electricity and other functions are organically combined and installed in a movable steel structure box body that is moisture-proof, rust-proof, dust-proof, mouse-proof, and fire-proof. Domestic box transformers generally adopt independent structures for each unit, with transformer rooms respectively. ,, High-voltage switch room, low-voltage switch room, a complete power supply system is formed through ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a zinc oxide lightning arrester in a box-type substation and a method for using the same. Use to the limit of life, the ground wire can be quickly disconnected after flashover occurs, and the gap between air molecules at the flashover can be increased, and the flashover can be eliminated in time, which solves the problem of rapid aging of zinc oxide resistors and sudden flashover. Explosion damage, soldering cannot melt and disconnect the ground wire during flashover, and flashover cannot be eliminated in time

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