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INSTALLATION (continued)
1 --- 5
pressthisbutton
observe these lights
Figure 1–6. Standard controls and indicators.
3 – Electrical Operation
First check nameplate on transfer switch; rated voltage
mustbethesameasnormalandemergencylinevoltages.
Close the enclosure door first !
Perform steps 1 through 8 at the right. Observe the
status lights. See Figure 1–6.
O Black circle means light is on.
P White circle means light is o ff .
NOTE: If Mot or Load Transfer
feature is activated, then transfer may
not occur immediately after the
respective time delays. Transfer will
only occur when the pha se relation-
ship between sources is correct.
This com p l etes the Fu nc tion al Te s t of the A SCO
Series 30 0 Automatic Tran sfer Switch. Leave the
engine–generator starting control i n the automatic
position.
1
The normal source must be
available and the generator
must be ready t o start.
Check t hat the Normal Source
Accepted light is on.
Source Accepted
Normal
Emergency
2
Press and hold the Transfer Test
button until the engine starts
and runs. This should happen
within 15 sec.
Transfer
Test
3
The Emergency Source
Accepted light should come on.
Source Accepted
Normal
Emergency
4
The transfer switch should
transfer to the Emergency
position. The Emergency
Transfer Switch Position light
should come on and the Normal
light should go off.
Transfer Switch
Position
Normal
Emergency
5
If the transfer to emergency
delay is used the transfer
should occurs after a time delay
(up to 5 minutes).
Forimmediatetransferpress
the Bypass Time Delay button.
Bypass
Time Delay
6
The transfer switch should
transfer back to the Normal
position. The Normal Transfer
Switch Position light should
come on and the Emergency
light should go off.
Transfer Switch
Position
Normal
Emergency
7
If the retransfer to normal delay
is used the retransfer should
occur after a time delay
(up to 30 minutes).
Forimmediateretransferpress
the Bypass Time Delay button.
Bypass
Time Delay
8
The unloaded running delay
keeps the generator running for
5 minutes (cool–down period).
Then the generator should stop
and the Emergency Source
Accepted light should go off.
Source Accepted
Normal
Emergency