INSTALLATION
(continued)
1---5
press this button
observe these lights
Figure 1–6. Standard controls and indicators.
3 – Electrical Operation
This procedure will check the electrical opertion of the
Automatic Transfer Switch. See Figure 1–6.
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.
●
Black circle means light is on.
❍
White circle means light is off.
NOTE:
If Motor Load Transfer feature
is activated, then transfer may not occur
immediately after the respective time
delays. Transfer will only occur when
the phase relationship between sources
is correct.
This completes the Functional Test of the ASCO Series 300
Automatic 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.
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).
For immediate transfer press
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).
For immediate retransfer press
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
