O&M Manual –90E1720004
Section 8 Operation Page 35 of 52
External Manual Operation (EMO)
Open transition transfer switches can be supplied with an optional external manual operator.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
Only properly trained personnel should perform this procedure.
Failure to follow these instructions will result in death or serious
injury.
Warning –Follow all NFPA 70E safety procedures and wear proper PPE.
Follow these instructions to external manually operate the transfer switch:
1. Verify the current position of the transfer switch by observing the position LEDs on
the on the RPTCS controller or the optional status indicator lights on the accessory
panel. There is a mechanical interlock on the transfer switch that prevents the switch
from being connected to both sources at the same time. On dual operator switches
the closed source must be opened first, and then the open source can be closed.
2. Locate the external manual operator handle (EMO) that was supplied with the
switch. A separate mounting kit was also supplied with the switch to mount the
handle either on the enclosure or another location.
Figure 25: External Manual Operator (EMO) Handle
3. Open the EMO covers located on the lower door.
4. Insert the EMO handle into the socket on the end of the operator and follow the
instructions on the door.
Figure 26: External Manual Operator (EMO) Operation
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