ABB Symphony Harmony Series Instructions Manual page 98

Power Supply Tray Removal
Purpose/Scope
2 min.
Safety Considerations
WARNING
CAUTION
Procedure
WBPEEUI210509A1
This procedure explains how to remove the power supply trays
from the power chassis.
Parts None.
Tools None.
1. Disconnect power before attempting these procedures. Fail-
ure to do so could result in severe or fatal shock, or equipment
damage.
1. Turn off the circuit breaker on the power entry panel (PEP)
corresponding to the line (LINE 1 or LINE 2) that powers the
power supply tray to be removed or installed. Process upset
may occur if a power supply tray is removed or installed with
power applied.
There are two scenarios in which a power supply tray would be
removed from the MPSIII system. One is if power supply tray
removal is part of power chassis replacement. In this case, all
power supply trays are removed from the power chassis to be
replaced with power disconnected at the source (refer to
Disconnected at Disconnected at Source Disconnected at Source Disconnected at Source
necessary to replace the power supply tray itself. In this case,
power is only removed from the power supply tray to be
replaced (refer to
ply ply Tray ply Tray ply Tray Tray).
Source). The other scenario is if removal is
Power Disconnected from Single Power Sup- Power Disconnected from Single Power Sup- Power Disconnected from Single Power Sup- Power Disconnected from Single Power Sup-
PR10
Power Power Power Power
PR10 - 1