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INSTALLATION (continued)
1 --- 4
RED
RED
GREEN
GREEN
observe
these lights
RED RED RED
operate
this switch
Figure 1-4. Standard controls and indicators.
2 – Electrical Operation
This procedure checks electrical operation of the ATS.
Be sure to close the enclosure door
before proceeding to prevent personal injury
in case of electrical system f ault.
Transfer Te st
The ATS should be bypassed a nd isolated. Both normal
and emergency sources must be available and the
emergency source generator (if used) must be capable of
being started; put engine starting control in automatic
position. The Transfer Switch Connected to Normal light
and the Normal Source Accepted light should be on.
1. Turn the Isolation Handle clockwise (approximately
7 turns) until the window shows TEST position.
NOTE: Theenginegeneratormaybesignalled
to start while turning the Isolation Handle. If
emergency source is available, the ATS may
operate to the emergency positi on. If it does,
operate Retransfer Delay Bypass switch.
2. Perform steps 1–4 at right. Observe the status lights.
■ Black square means light is on.
❐ White square means light is off.
3. Turn the Isolation Handle clockwise (approximately
16 turns) to the CONN (connected) position.
4. Push in the Bypass Handle and turn it counterclock-
wise until the OPEN indicator shows green.
This completes the Functional Test of the ACTB.
1
Turn and hold Transfer Control
switch clockwise to Transfer
Test until the engine starts
and runs (within 15 sec.). The
Emergency Source Accepted
light should come on.
Load
Disconnect
Active
2
Transfer switch CE closes and
then Transfer Switch CN opens
(closed–transition overlap). The
Transfer Switch Connected to
Emergency light should come
on and the Transfer Switch Con-
nected to Normal light should
go off (you might see and hear
the brief overlap transfer).
Load
Disconnect
Active
3
Transfer switch will operate
back to Normal position after
Feature3Atimedelay.Forim-
mediate retransfer turn Transfer
Control counterclockwise to
Retransfer Delay Bypass.The
Transfer Switch Connected To
Normal light should come on;
Transfer Switch Connected to
Emergency light should go off.
Load
Disconnect
Active
4
The engine–generator will stop
after the Feature 2E time delay
(unloaded running engine cool-
down). The Emergency Source
Accepted light should go off.
Load
Disconnect
Active