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One of the important equipments in substation switchgear and under high load condition, often appear contact temperature is too high, reliable power supply directly affects the user, or even serious accidents. Based on the comprehensive analysis of the current commonly used temperature measurement technology, and optical fiber sensor as the main research object, based on Fiber Bragg grating switch cabinet on-line temperature measuring system and in the practical application of the system were test effectiveness. The results showed that the optical fiber temperature sensor with high precision, effective for a switch cabinet temperature online monitoring, the staff to control the real-time operation state of the switch cabinet, timely detection and treatment of hidden faults, to offer an important guarantee to ensure the safe operation of the switch cabinet.

Design of On-line Temperature Measurement System for High Voltage Switch Cabinet