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INSTALLATION (continued)
1-- 5
pressthisbutton
observe these lights
Figure 1–6. Standard controls and indicators.
3 – Electrical Operation
This p rocedure will check the electrical opertion o f the
Automatic Transfer Switch.
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 8 at the right. Observe the
status lights. See Figure 1–6.
O Black circle means light is on.
P White c ircle means light is off.
NOTE: IfMotorLoadTransferfeature
is activated, then transfer may not occur
immediately after the respective time
delays. Transfer will only occur when
the phase relationship between sources
is co rrect.
This com p l etes the Functional Test of the ASCO Series 300
Automatic Tran sfer Switch . Leave the engine–generator
starting control in the automatic position.
1
The normal source must be
availableandthegenerator
must be ready to start.
Check t hat the Normal Source
Accepted light i s 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 tr ansfer 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 de lay
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 m inutes ( cool–down p eriod).
Then the generator should stop
and the Emergency Source
Accepted light should go off.
Source Accepted
Normal
Emergency