S&C Instruction Sheet 659-520
7
Dead-Front Access
Panels
WARNING
Do not remove the dead-front access panels unless qualified to do so . Potentially lethal
voltages are present beyond the dead-front access panels . High-voltage dc may be
present even without the utility power connected .
Upon opening the PCS enclosure door, the three dead-front access panels are shown.
The panels protect the user from the energized components of the PCS. See Figure 3.
Dead-front access
panels
Figure 3. Dead-front access panels.
The panels may be removed starting from the top panel to the bottom panel. Use a #2
Phillips screwdriver for the two screws at the top of each panel and a 13-mm socket
wrench for the side flange nuts. Refer to Figure 34 on page 46 for an illustration of the
dead-front access panel removal procedure.
Inner Components
DANGER
Before removing the dead-front access panels, make sure that the PCS is de-energized
to avoid serious injury . When removing the three dead-front access panels, remove them
from top to bottom to avoid injury or equipment damage .
User interface
Control assembly
Cable termination
area
EMI filters
Shelf (stowed)
Dc circuit breaker
Fuses
Ac circuit breaker
Radio (provisions)
Inverter
Figure 4. Components inside the PCS enclosure.
Components and Controls
