Novel earthing knife-switch sign for 6 kV system ZS1 type switch cabinet

Abstract

The invention belongs to the technical field of nuclear power station operation and maintenance, and particularly relates to a novel earthing knife-switch sign for a 6 kV system ZS1 type switch cabinet. The novel earthing knife-switch sign is characterized by comprising a body part and a lug boss structure; the body part and the lug boss structure are integrally formed, and the lug boss structure is arranged at the rear end surface of the body part; the rear end surface of the lug boss structure is fixed on a rotary shaft inside the 6 kV switch cabinet. The novel earthing knife-switch signs are arranged on 20 sections of 6 kV busbars respectively on the spot of 304, 305, 403 and 404 overhaul and a routine maintenance period, the situation of earthing knife-switch sign damage does not appear on the ZS1 switch cabinet with the novel earthing knife-switch signs, and it is proved that the novel earthing knife-switch sign completely meets onsite operation requirements.

Description

technical field [0001] The invention belongs to the technical field of operation and maintenance of nuclear power plants, and in particular relates to a new ground knife indicator plate used for a ZS1 type switch cabinet of a 6kV system. Background technique [0002] In the 6kV system ZS1 switchgear, during the installation and commissioning stage and the insulation measurement of the downstream motor load during the overhaul period, the ground knife indicator was repeatedly damaged, and the ground knife status of the ZS1 switchgear could not be correctly indicated. Such defects will cause misjudgments in operation and daily maintenance, and in severe cases may lead to accidents such as equipment damage and casualties. At the same time, the replacement of a damaged ground knife sign requires the manufacturer's professionals to remove all parts of the switch cabinet ground knife shaft under the window of the entire 6kV bus power failure, which not only increases the cost of r...

AI Technical Summary

Problems solved by technology

[0002] In the 6kV system ZS1 switchgear, during the installation and commissioning stage and the insulation measurement of the downstream motor load during the overhaul period, the ground knife indicator was repeatedly damaged, and the ground knife status of the ZS1 switchgear could not be correctly indicated.

Such defects will cause misjudgments in operation and daily maintenance, and in severe cases may lead to accidents such as equipment damage and casualties

At the same time, the replacement of a damaged ground knife sign requires the manufacturer's professionals to remove all parts of the switch cabinet ground knife shaft under the window of the entire 6kV bus power failure, which not only increases the cost of replacing the ground knife sign, but also increases the cost of the 6kV bus power failure. It will affect the normal power generation of the unit

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