INSTALLATION (continued)
1--5
observe
these lights
RED
RED
GREEN
GREEN
AMBER
operate
this switch
Figure 1-7. Standard controls and indicators.
3 --- Electrical Operation
This procedure will check the electrical operation of the
Automatic Delayed–Transition Transfer Switch. See
F i gu r e 1 --- 7 .
Close the enclosure door first !
Transfer Test
Both normal and emergency sources must be available
and the emergency source generator (if used) must be
capable of being started in this procedure.
Perform steps 1 through 5 at the right. Observe the
status lights.
Q Black square means light is on.
S White s quare means light is off.
This completes the Functional Test of the ADTS.
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 CN opens and
the Transfer Switch Connected
to Normal light should go off
and the Load Disconnect Active
light should come on. Both CN
& CE contacts are now open.
Load
Disconnect
Active
3
After the delay transition time
delay, the CE Transfer switch
will operate to the Emergency
position. The Transfer Switch
Connected To Emergency light
should come on and Load Dis-
connect Active light goes off.
Load
Disconnect
Active
4
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
5
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
