High-voltage isolation switch operation display circuit

  
As we all know, high-voltage isolation switch is not allowed to meet with a load that would otherwise produce arc, causing a short between the high voltage bus road accident, e
High-voltage isolation switch operation display circuit - schematic

ndanger the equipment and personal safety. Therefore, high voltage switchgear are taking mechanical or electrical interlock device type, and only when high pressure circuit breaker, disconnecting switch to pull off; the circuit breaker in the closing position, must not be co-isolation switch. Operating sequence order can not be reversed. In order to avoid misuse of the accident, but also made high-voltage isolation switch operation display, the principle of the circuit shown in Figure 13-114. Figure, QF of high voltage circuit breaker normally open auxiliary contacts; RL is photosensitive resistance, installed in the isolation switch operating handle; H display lamp, an outer cover that read illegal operation, non-suit words, installed in the cabinet door .




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