Abstract: During the operation of the high-voltage switchgears, The contact in the cabinet and the bus connection, the dynamic and static contact circuit generates too heat, which is easy to cause power failure and fire accident. Therefore, the temperature monitoring is very important in the high-voltage switch cabinet, especially the three-phase contact temperature monitoring. The traditional wired temperature measurement method can not be used because of the exposed voltage of high voltage equipment. The wireless temperature measurement system uses radio waves, no wiring, equal potential with high-voltage equipment, and no insulation measures. Therefore, the wireless temperature measurement system can solve the temperature measurement problem of high-voltage equipment.

　　Keywords: high-voltage switchgears，Wireless Temperature Monitoring System

　　0.Project Overview

　　This project is the expansion project of the T1 terminal of Nanjing Lukou International Airport. It needs to be equipped with wireless temperature measurement products to realize the temperature rise monitoring of the circuit breakers in the cabinet.The working environment temperature of the sensor meets the requirement of -40℃ to +120℃. Choose ATE300 type CT inductive powered temperature sensor. And choose the ATC400 transceiver to connect to the background system.

　　1.Wireless Temperature Monitoring System Introduction

　　Wireless Temperature Monitoring System is suitable for 3-35kV indoor switchgears, including built-in switchgears, handcart switchgears, fixed switchgears and loop-net switchgears. It is also suitable for 0.4kV low-voltage switchgears such as fixed switchgears and drawer switchgears.

　　2.Wireless Temperature Monitoring Configuration Scheme

　　1）Wireless temperature monitoring of contacts in high and low voltage cabinets

　　2）Wireless temperature monitoring with operation and display function for contacts in high-voltage cabinets (single cabinet local display)

　　3）Wireless temperature monitoring of contacts in high and low voltage cabinets (no local display )

　　4）Wireless temperature monitoring of contacts in high and low voltage cabinets（Centralized local display）

　　5）Local wall-mounted centralized display solution

　　3.Introduction of wireless temperature measuring product

　　①wireless temperature sensor

②wireless transceiver

③Display terminal

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