SF_6断路器放电故障追踪测试和故障分析判断

Tracking Test,Analysis and Judgment of Discharge Fault in SF_6 Circuit Breaker

对有自恢复放电故障的SF6断路器进行追踪监测,并将该SF6断路器检修解体,监测数据和解体情况验证了SF6断路器自恢复绝缘放电故障符合φ(SO2)/φ(H2S)>7的判据;对φ(SO2)和φ(H2S)的数值范围允许比较宽泛,即使达100μL/L,对设备安全运行也没有即时危险,可以有计划地安排检修;裸导体过热故障未涉及非自恢复绝缘的,可以使用自恢复绝缘放电故障的判据。

The SF6 circuit breaker having self-restoring insulation discharge fault was tracked and monitored.It is verified by the monitoring data and the strip inspection of the circuit breaker that the fault met the criterion of φ（SO2）/φ（H2S）＆gt; 7;the limitation on φ（SO2）and φ（H2S）is not so strict;even 100 uL/L is not instantly dangerous to the safe operation of equipment and maintenance can be scheduled;as for overheating of bare conductor unrelated to non-self-restoring insulation,the criterion for self-restoring insulation discharge fault can be used.