OPERATING INSTRUCTIONS RH 340 Electric OPeration

Electric motor can not be switched on

If BCS prohibits switching on the electric motor the operator should check the following:

 Time-out before restart period still running?

 EMERGENCY STOP switch in control column unlocked?

 EMERGENCY STOP switch in control cabinet (400V) unlocked?

 EMERGENCY STOP pullswitch near the service station unlocked?

 Servicing switch unlocked?

 Monitoring lamps "7.2kV OK" and "PHASE SEQUENCE OK" on the control cabinet (400V) and on the control column lighting? If not, the circuit breaker is switched off or the 6.6kV voltage supply is missing.

 Shut-off flaps at the hydraulik oil reservoir closed?

 Check BCS display: Faults or explanatory text displayed? If so, give information to the electric maintenance personnel.

If after all of these checks the electric motor cannot be switched on the operator has to inform the specialist personnel for maintenance and service on electric excavators. Only these have the skills to work in a safe way, for trouble shooting and removing the fault.

In case of failure

If failures in the electrical systems occur, BCS displayes warnings and corresponding explanatory text

Failures in electrical systems may exclusively be removed by specialist personnel for maintenance and service on electrical systems.

The following faults may be responsible:

 fault in high-voltage transformer

 7.2kV/ 400V/ 230V transformer overloaded.

 earth fault.

If BCS display shows "Overcurrent", the operator does not know if an "Earth fault" happens. In worst case the excavator may be energized. The operator must notify the electrician in charge from the excavator superstructure.

The electrician must then cut off the voltage supply from the transformer station and locate and rectify the fault.