Description
电缆屏蔽层必须一点接地,如果电缆屏蔽层两端A、B都接地,就存在地电位差,则有电流流过屏蔽层,当发生异常状态如雷击时,地线电流将更大。此外,屏蔽层、接地线和大地有可能构成闭合环路,在变化磁场的作用下,屏蔽层内有会出现感应电流,通过屏蔽层与芯线之间的耦合,干扰信号回路。
Westinghouse DS-632 DS632 3200A Amptector I – A LSIG
Westinghouse DS-632 DS632 3200 A Amp Amptector I-A LSIG
GE AKR-6D-30H 800 A Amp Air Breaker Versa Trip LSG 635V
Klockner-Moeller NZM12-1250 with Trip ZM12-1200 A Amp
GE AKR-6D-50 1600 A Amp Air Breaker MVT Trip LSG 635 V
Cutler-Hammer Power Breaker DSL II 620 DSLII 2000A Amp
Westinghouse Seltronic HNC31200F 1000 Amp A 1000Amp
Cutler-Hammer Power Breaker DSL II DSLII-620 2000 Amp
Westinghouse SPCB 2000 Amp SPCB2000 2000A Trip LIG