SWITCHGEAR, PERFORMANCE EVALUATION METHOD OF INSULATOR IN SWITCHGEAR, AND TEST PIECE FOR MEASURING INSULATION RESISTANCE

摘要

PROBLEM TO BE SOLVED: To improve the reliability of an insulation performance evaluation of insulators installed inside a switchgear.;SOLUTION: A switchgear 10 includes therein a space that houses a main busbar 12 and others. A main busbar room 50A and others are arranged in the space separated by a partition wall 54 and others, while supporting insulators 26 are installed in the main busbar room 50A. The switchgear 10 comprises: a test piece 30 for measuring insulation resistance, which is installed in the main busbar room 50A and connected to an insulation resistance measurement device 42 and made of the same material as the supporting insulators 26; a humidity detector 28 for detecting a relative humidity of the main busbar room 50A; a recording part 46B for recording relation data between the relative humidity detected by the humidity detector 28 and the insulation resistance of the test piece 30 measured by the insulation resistance measurement device 42; a determination part 46C for determining insulation performance of the supporting insulators 26 based on the relation data recorded in the recording part 46B; and an alarming unit 44 for issuing an alarm when the determination result of the determination part 46C is a negative determination.;COPYRIGHT: (C)2012,JPO&INPIT