ASCO 4ATE, 4ACTE, 4ADTE, 4NTE, 4NCTE, 4NDTE
Installation Manual
Page 6
ASCO Power Technologies
381333-445 B
Figure 3. Transfer button and indicator lights
2 – Electrical Operation
This procedure will check the electrical operation of the
transfer switch.
Close the transfer switch enclosure door and
tighten the screws before you test electrical
operation.
Perform steps 1 through 5 at the right. Observe the status
lights. See Figure 3.
●
Black circle means light is on.
○
White circle means light is off.
NOTE:
For 4NTE, 4NCTE, 4NDTE manually start the
emergency generator at the generator. Then press the
transfer button for load transfer. If the inphase transfer
feature is activated, transfer may not occur immediately.
Transfer will occur when the phase relationship between
sources is correct. Press the transfer button again for
load retransfer to normal, then manually stop the
generator at the generator.
Also see User’s Guide 381333-444 for inphase transfer
and time delay settings in the controller.
This completes the functional test of the transfer switch.
Leave the engine-generator starting control in the
automatic position.
1
The normal source must be available and the generator
must be ready to start. Check that the normal source
accepted light is on.
2
Press the transfer button. The engine
should start and run within 15 seconds.
For 4NTE, 4NCTE, 4NDTE the
generator must be started manually at
the generator.
The emergency source accepted light should come on.
3
The transfer switch should transfer to the emergency
position. The load on emergency light should come on
and the load on normal light should go off. For 4NTE,
4NCTE, 4NDTE press the transfer button for load
transfer. For 4ADTE, 4NDTE both lights will be off
during the delayed-transition transfer time delay.
If the transfer to emergency delay is
used, the transfer occurs after a time
delay. For immediate transfer (bypass
timer) press the transfer button again.
4
The transfer switch should transfer back to the normal
position. The load on normal light should come on and
the load on emergency light should go off. For 4NTE,
4NCTE, 4NDTE press the transfer button for load
retransfer. For 4ADTE, 4NDTE both lights will be off
during the delayed-transition transfer time delay.
If the retransfer to normal delay is used
the retransfer should occur after a time
delay. For immediate retransfer (bypass
timer) press the transfer button again.
5
The unloaded running delay keeps the generator running
for a cool-down period. Then the generator should stop
and the emergency source accepted light should go off.
For 4NTE manually stop the generator at the generator
(after a cool-down period).
Observe
these
lights
Press this
button
