Local cold surface heating and heat preservation anti-condensation method for switch cabinet and switch cabinet employing local cold surface heating and heat preservation anti-condensation method

Abstract

The invention relates to a local cold surface heating and heat preservation anti-condensation method for a switch cabinet and the switch cabinet employing the local cold surface heating and heat preservation anti-condensation method. According to the method, a cold surface, namely the surface on which condensation is easily generated at a relatively low temperature, of the switch cabinet is obtained through heat and moisture analysis; a heater is placed at the position, close to the cold surface, in a cabinet body of the switch cabinet to heat the cold surface; a thermal insulation material layer is arranged on the outer surface of the cold surface to reduce heat exchange of the cold surface and an external environment; and the temperature of the cold surface is further improved. Through a local heating and heat preservation technology on the switch cabinet, prevention and treatment are carried out aiming at the position at which the condensation is easily generated in the cabinet; the condensation phenomenon in the cabinet can be effectively and clearly treated; the adopted thermal insulation material is relatively low in cost; extra power consumption is not needed; the power of the heater can be reduced by increasing the thermal insulation material; and the cost is further reduced.

Description

technical field [0001] The invention relates to a switch cabinet anti-condensation engineering technology in the field of electric power technology, in particular to a method for local heating and heat preservation and anti-condensation of a cold surface of a switch cabinet and a switch cabinet using the method. Background technique [0002] The switchgear works in different environments, the ambient temperature and humidity change greatly, and the switchgear cannot be completely sealed. In addition, the cabinet needs to be opened during maintenance, which will cause external humid air to enter the cabinet, resulting in The condensation phenomenon will make the insulation performance drop, discharge, flashover and other failures in the cabinet prone to occur, resulting in equipment outage, which has an important impact on the stability of the entire power system. Therefore, solving the problem of condensation in the switchgear is very important to the safe operation of the s...

AI Technical Summary

Problems solved by technology

[0003] The existing anti-condensation technology in the switch cabinet is generally to place a heater in the cabinet, and use a manual or automatic control system to heat the switch cabinet as a whole. This does not completely guarantee that there will be no condensation anywhere in the cabinet. The error of manual or automatic control, the unreasonable placement of the heater, and the lack of any insulation measures in the cabinet will make the local temperature of the switch cabinet relatively high. Condensation may still occur in low places, affecting the safe operation of the switchgear, and heating the whole inside of the switchgear. The heater has a large power and lacks insulation measures, resulting in unnecessary waste of electric energy.

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