INSTALLATION
(continued)
1--5
Press until light
FLASHES
Press for 15 Seconds
Florham Park NJ 07932 USA
TRANSFER SWITCH TEST
BYPASS TIME DELAY
SET ENGINE EXERCISER
observe these lights
press this button
Figure 1–6. Standard controls and indicators.
3 – Electrical Operation
First check nameplate on transfer switch; rated voltage
must be the same as normal and emergency line voltages.
Verify that the feeders have been
connected to the proper lugs.
!
Use extreme caution when using a meter
to measure voltages in the following
steps. Do not touch power terminals;
shock, burns, or death could result !
Perform steps 1 through 8 at the right. Observe the status
lights. See Figure 1–6.
●
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
Available
light is on.
2
Press and hold the
Transfer
Switch Test
button until the
engine starts and runs. This
should happen within 15 sec.
TRANSFER SWITCH TEST
3 The
Emergency Source
Available
light should come on.
4
The transfer switch should
transfer to the Emergency
position. The
Load Connected
to Emergency
light should come
on and the
Load Connected to
Normal
light should go off.
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
Load Connected
to Normal
light should come on
and the
Load Connected to
Emergency
light should go off.
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
Available
light should go off.
