(1) to prevent the wrong opening and closing of circuit breakers;
(2) to prevent the opening and closing of disconnecting switches with loads;
(3) to prevent the electrically charged hanging (closing) of grounding wires (grounding cutter);
(4) to prevent the closing of circuit breakers (disconnecting switches) with grounding wires (grounding cutter);
(5) to prevent the wrong entry into the electrically charged intervals.
Preventing matters
1, wrongly divided and wrongly closed
That is, to prevent wrongly dividing and wrongly closing the circuit breakers, only the operation instruction corresponding to the operating equipment can be operated on the operated equipment.
2, load separation
that is, to prevent the load separation and closing of the disconnecting switch, circuit breaker, load switch, contactor closed state can not operate the disconnecting switch.
3, charged grounding
that is: to prevent charged hanging (close) grounding wire (grounding switch), only in the circuit breaker breaking state, can hang the grounding wire or close the grounding switch.
4, with the ground to send power
that is: to prevent with the ground to send power, to prevent with the grounding wire (grounding switch) to close the circuit breaker (disconnect switch).
5, mistakenly enter the charged
that is: to prevent mistakenly enter the charged interval, only when the compartment is not charged, can open the door into the compartment.
Four states of reverse gate operation
Running, hot standby, cold standby, maintenance
(1) running state: means that the equipment's disconnecting switch and circuit breaker are in the closed position.
(2) Hot standby state:It refers to the equipment whose disconnecting switch is in the closed position and only the circuit breaker is disconnected.
(3) Cold standby state: refers to the equipment circuit breaker, disconnecting switch are in the open position, no safety measures.
(4) maintenance state: refers to the circuit breaker and disconnecting switch of the electrical equipment are in the off position, and according to the "safety regulations" and maintenance requirements for safety measures.
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