Armor-middle-mounted type metal sealed switch cabinet grounding device

Abstract

The invention discloses an armor-middle-mounted type metal sealed switch cabinet grounding device. The armor middle-mounted type metal sealed switch cabinet grounding device comprises a device body (5) and is characterized in that the lower end of the device body (5) is provided with moving wheels (6), the device body (5) is connected with a manual crank (1) which is connected with a locking box (11) through a screw rod (7), the upper end of the device body (5) is connected with a sensor (3) which is respectively connected with a contact (2) and an induction lamp (4), the induction lamp (4) is connected with a test jointing clamp (9) which is connected with a grounding wire (8), and the grounding wire (8) is connected with the device body (5). Electricity proofing and grounding can be safely and reliably conducted on a bus in an armor-middle-mounted type switch cabinet, the accuracy of measuring data of a test is ensured, power failure time is shortened, potential safety hazards are eliminated, power supply reliability is improved, and the personal safety of maintainers is ensured.

Description

Technical field: [0001] The invention relates to a grounding device for an armored middle-mounted metal-enclosed switch cabinet, which belongs to the technical field of power system substation maintenance. Background technique: [0002] The 10kV armored middle-mounted metal-enclosed switchgear is a cabinet-type electrical equipment that uses air insulation to integrate busbars, circuit breakers, CTs, PTs, lightning arresters, grounding switches and other transformation equipment in a closed space. It has been widely used due to its reasonable structural design, good protection performance, strong breaking capacity, good dynamic and thermal stability, strong interchangeability, and convenient use and maintenance. [0003] However, when the operator conducts electrical inspection and grounding of the busbar in the armored central metal-enclosed switchgear during the power outage operation of the equipment, there is no point that can safely and reliably conduct electrical inspe...

AI Technical Summary

Problems solved by technology

If it is hooked to the static contact in the switch cabinet, it violates the provisions of Article 4.5.4 of the "State Grid Corporation of Electricity Safety Work Regulations (Transformation Part)": "After the handcart in the high-voltage switch cabinet is pulled out, isolate the It is prohibited to open the baffle of the live part after it is closed”; if the cover plate of the busbar room of the switchgear is opened, the outer layer of the busbar in the switchgear is baked and covered with heat-shrinkable material in order to increase the withstand voltage level, and the joints are also covered with heat-shrinkable contacts. The head box is closed, so there is no reasonable hooking place for the grounding wire, and the grounding wire is easy to fall off, which brings great safety hazards to the operator's electrical inspection and maintenance personnel's inspection process

At the same time, when the bus bar of the armored middle-mounted closed switchgear and its affiliated equipment are subjected to high-voltage tests and primary nuclear equivalent work, because the contacts in the cabinet are designed in a round shape, the clamps are not fixed reliably during the test, which cannot ensure the safety and security of the equipment during the test. Accuracy of test data

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