Contact thermometer of high-voltage switch cabinet

Abstract

The invention relates to electrical equipment, in particular to a contact thermometer of a high-voltage switch cabinet. The contactor thermometer comprises an upper computer, a receiving host and a transmitter module. The transmitter module is wirelessly connected with the receiving host; the receiving host is connected with the upper computer via serial communication. According to the contact thermometer of the high-voltage switch cabinet, the heat temperature of switch contacts is monitored timely and abnormal heat contacts are warned timely, so that the burnout of the contacts is prevented; meanwhile, the contact temperature is recorded in the history and the normal operation of the switch cabinet can be effectively guaranteed by analyzing historical temperature data. People can measure the temperature without going to the site; and the contact thermometer of the high-voltage switch cabinet has the advantages of reliable high-voltage isolation and anti-interference ability and is important to the safe operation of the switch cabinet.

Description

technical field [0001] The invention relates to electrical equipment, in particular to a high-voltage switch cabinet contact thermometer. Background technique [0002] High-voltage switchgear is an important electrical equipment in power plants and substations. During the long-term operation of the high-voltage switchgear, due to the aging of the contacts in the switchgear or the connection of the bus bar, the contact resistance increases and heats up, resulting in the temperature of the contact or the connection of the bus bar rising. The temperature rise of the contact or bus bar connection will further increase the contact resistance, thereby generating more heat and further increasing the contact resistance, forming a vicious circle, which will eventually lead to fire accidents and failures. In recent years, many switchgear overheating accidents have occurred in power plants and substations, causing fires and large-scale power outages. Predicting the operating status of...

AI Technical Summary

Problems solved by technology

[0003] However, it is difficult to detect the operating temperature of the contacts in the high-voltage switch cabinet. This is mainly because there is high voltage in the cabinet, and the space is small and mostly closed. The usual temperature measurement method cannot be used.

At present, there are two types of instruments for measuring the temperature of high-voltage switches. One uses an analog temperature sensor, which has inaccurate temperature accuracy and poor anti-interference ability; restricted in use

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