COMPLETE SHUTDOWN

COMPLETE SHUTDOWN

1. Park the machine on a level area that is out of the way of rock slides or falling rocks and that is not prone to flooding. The surface of the area should be firm so the machine cannot sink into it.

2. When the machine is safely located, follow the procedure described in the preceding section "Partial Shutdown".

3. Leave the Operator's Cab and go to the High Voltage Cabinet inside the Machinery House.

4. De-energize the M.G. Set induction drive motor by pressing the M.G .Set stop pushbutton on the front of the High Voltage Cabinet. The green indicator in the M.G. Set start pushbutton will go out when the vacuum breaker opens the circuit feeding the motor. The M.G. Set will coast to a stop.

5. Go to the Motor Control Center. Fully press, then release the STOP pushbuttons for the following systems to shut them down:

• Hoist Motor Blower (this shuts down all motor blowers).

• Filter Fan No. 2.

• Filter Fan No. 1.

The respective green indicator lights should go out.

6 Move the Air Compressor selector switch to its OFF position.

7. If it is humid or cool, turn the Anti-Condensation Heater selector switch to AUTO, if the machine has this system. This will protect the electrical equipment while the machine is shut down and the power is on.

The machine is now shut down to a point where inspection, maintenance, etc., can be performed. Turn off all lights not needed.

DANGER! HIGH VOLTAGE! High voltage and incoming electric power is ON to the transformers, disconnects, electrical cabinets, and collector rings. NEVER PERFORM MAINTENANCE OR REPAIRS IN THESE AREAS WITHOUT DISCONNECTING THE POWER SUPPLY (TRAIL CABLE) FROM THE MACHINE. Failure to do so could result In personal Injury or death.