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Disconnecting the Supply Voltage and External Voltages

 



Disconnecting Supply Voltage and External Voltages. 

  1. . If the supply voltage is only to be disconnected upstream from the circuit breaker, switch the circuit breaker of the supply voltage off. 
  2. If the supply voltage is also to be disconnected downstream from the supply voltage circuit breaker, switch the external circuit breaker of the supply voltage off.
    Tip: The external circuit breaker of the supply voltage is usually located in a subordinate distribution station.
  3. Disconnect any additional external voltage. 
  4. Switch the motor-protective circuit-breakers of the grid monitoring off. 
  5. Open the measurement and disconnect terminals 
  6. Ensure that no voltage is present 
  7. . Cover or isolate any adjacent live components 

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