Operation 2-9TP-5672 11/95
To Disconnect The P1 Plug
1. If the transfer switchis in the normalposition, open
the emergency-source circuit breaker.
2. If the transfer switch is in the emergency position,
open the normal-source circuit breaker.
3. Separate the in-line disconnect plug by grasping
and squeezing the plug. Do NOT pullon the wires.
560423
Figure 2-2. In-Line Disconnect Plug
To Reconnect The P1 Plug
1 Engagethe in-line disconnect plugby grasping the
connectors and pressing them together. See
Figure 2-2.
2 Ifthe transfer switch isinthenormalposition,place
thegeneratorset startswitchinthe AUTOposition.
Then close the emergency-source circuit breaker.
3. If the transfer switch is in the emergency position,
close the normal-source circuit breaker. The load
willautomaticallyretransfertothenormal source, if
it is available, after a time delay. For immediate
retransfer, open and then reclose the
emergency-source circuit breaker. Place the
generator set start switch in the AUTO position.
Electrical Operation Test
Place the transfer switch in the NORMAL position. Use
thefollowingproceduretocheckthe electrical operation
of the automatic transfer switch:
1. Pressandholdthetest pushbutton for 15seconds.
See Figure 2-1.
2. The generator set should start and run after the
time delay engine start (TDES) completed timing.
3. The transfer switch will transfer to the emergency
position. The transfer occurs after the
normal-to-emergency time delay (TDNE) has
completed timing.
4. Release the test pushbutton. The transfer switch
retransfers to normal after the
emergency-to-normal time delay.
5. Time delay engine cooldown (TDEC) allows the
enginetocontinuerunningforanunloadedrunning
time. The transfer switch TDEC will complete
timing before any TDEC function in the generator
set controller begins timing.
6. Close load circuit breaker(s) when loads may be
safely energized.
NOTE
Connecting the transfer switch in-line disconnect
plugs(P1)togetherwhenthegeneratorcontroller’s
master switch is in the AUTO position causes the
generator set to IMMEDIATELY start and run until
the generator set controller’s cooldown timer
completes timing.
This completes functional tests of the transfer switch.
Leave the AUTO/MANUAL switch in the AUTO
TRANSFER position.
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