Normal Shutdown Procedure; Emergency Shutdown Procedure - Pacific Power Source MS SERIES Operation Manual

SECTION 4

4.4.4 NORMAL SHUTDOWN PROCEDURE

This procedure describes how to place the Power Source into the normal Off
state. One of two conditions may be desired when turning off the Power Source:
1. Secure power from the Power Source.
supplies, inverters and output to the load. Control circuits remain active.
To secure power from the Power Source proceed as follows:
STEP 1: Turn off all loads and open output circuit breaker if provided.
STEP 2: Rotate the Mode Select Switch to the OFF position. Verify that the
OFF lamp is lit. Verify that the STANDBY and ON lamps are
extinguished.
2. Secure all power; no power applied to either the Power Source or the
Load.
To secure all power to and from the Power Source proceed as follows:
STEP 1: Turn off all loads and open output circuit breaker if provided.
STEP 2: Rotate the Mode Select Switch to the OFF position.
STEP 3: Open the input power circuit breaker. This removes all power to and
from the cabinet.

4.4.5 EMERGENCY SHUTDOWN PROCEDURE

Emergency shutdown is accomplished by depressing the EMER OFF Switch at
any time.
The principle function of the Emergency Off state is to open the input and output
contactors in the event of internal Power Source failure.
A secondary purpose is to protect against overheating of the inverter or input
transformer in the event of excessive load current for extended time (an unlikely
occurrence due to conservative thermal design.)
A third function is to give the operator a quick "Turn Off" means in the event of an
emergency - since pressing EMER OFF is slightly faster than rotating the Mode
Select Switch to Off.
The Emergency Off state can only be removed by rotating the Mode Select
Switch to Off and pressing START/RESET. The EMER OFF lamp will extinguish
and the cabinet will be in a normal Off state.
Pacific Power Source ©2013
Turn off high voltage power
4-23
OPERATION
Document # 126050-10 Rev E