Switch User Manual

INSTALLATION (continued)
1 --- 5
pressthisbutton
observe these lights
Figure 1–6. Standard controls and indicators.
3 – Electrical Operation
This procedure will check the electrical operation of the
Automatic Transfer Switch.
Close the transfer switch enclosure door and
tighten the screws before you test electrical
operation.
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 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 off.
NOTE: IfMotorLoadTransferfeature
is activated, then transfer may not occur
immediately after the respect ive time
delays. Transfer will only occur when
the phase relationship between sources
is correct.
This com p l etes the Function al Test of the A SCO Series 300
Automatic Transfer Switch. Leave the engine–generator
starting control in the automatic position.
1
The normal source must be
availableandthegenerator
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
Tes t
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