A method and tool for detecting the insertion depth of handcart switchgear

Abstract

The invention relates to a handcart type switch cabinet of a transformer substation and specifically relates to a method and a tool for detecting insertion depth of a handcart type switch cabinet. The method includes the following steps of disconnecting and grounding a power source of the handcart type switch cabinet; measuring depth B of the end of a fixed contact (1) and the outer edge of a fixed contact seat (3); measuring depth R of a chamfer contact point on a moving contact (4) of the handcart type switch cabinet and the end of the moving contact (4); measuring depth A of the position of a pushed positioning plate (2) and the end of the fixed contact (1); calculating depth L of insertion of the contact point of the moving contact (4) into the fixed contact (1), that is, the depth L=the depth A-the depth B-the depth R. The method and the tool have the advantages of being low in cost, convenient to use, simple in manufacture and structure, reliable in judgment, rapid in operation, measurable and capable of being inserted, saving work time, improving work efficiency and avoiding potential safety hazards.

Description

technical field [0001] The invention relates to a handcart switch cabinet in a substation, in particular to a method and a tool for detecting the insertion depth of the handcart switch cabinet. Background technique [0002] Now the KYN28 series mid-mounted high-voltage switchgear has been widely used in 35kV and 10kV power distribution systems. The full name of the mid-mounted cabinet is armored type removable mid-mounted metal-enclosed switchgear. The instrument room (isolated from each other), the middle layer is the circuit breaker room, and the lower layer is the cable room. During long-term use, we found that the most dangerous failure of this switch is poor contact of the handcart contacts. When the contact is not in good contact, it will cause problems such as heating, local overheating and melting, insulator fracture and structural jamming, and even develop into a power grid accident. The insertion depth of the handcart is the basis for ensuring the reliable contac...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and tool for detecting the insertion depth of handcart-type switchgear, so as to solve the problem that the insertion depth of the existing handcart-type switchgear cannot be accurately checked, and poor contact is prone to cause a series of potential safety hazards

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