Winco ASCO 300 E Design 260-400 Amp - Manual (Page 6)

INSTALLATION (continued)
1--4
Press until light FLASHES Press for 15 Seconds
TRANSFER SWITCH TEST BYPASS TIME DELAY SET ENGINE EXERCISER
observe these lights
Figure 1–5. Standard controls and indicators.
2 – Voltage Checks
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 6 at the right. Observe the status
lights. See Figure 1–5.
● Black circle means light is on.
❍ White circle means light is off.
* If necessary, adjust voltage regulator on the generator
according to the manufacturer’s recommendations. The
Automatic Transfer Switch will respond only to the rated
voltage specified on the Transfer Switch nameplate.
1
Close the normal source circuit
breaker. The Transfer Switch
Connected To Normal and the
Normal Source Available lights
should come on.
2
Use an accurate voltmeter to
check phase to phase and
phase to neutral voltages pres-
ent at the transfer switch normal
source terminals.
3
Close the emergency source
circuit breaker. (Start generator,
if necessary.) The Transfer
Switch Connected To Normal
and the Emergency Source
Available lights should come on.
4
Use an accurate voltmeter to
check phase to phase and
phase to neutral voltages pres-
ent at the transfer switch emer-
gency source terminals.*
5
Use a phase rotation meter to
check phase rotation of emer-
gency source; it must be the
same as the normal source.
A B C
6
Shut down the engine–genera-
tor, if applicable. The Emergen-
cy Source Accepted light should
go off. Then put the starting
control selector switch (on the
generator set) in the automatic
position. Close enclosure door.
Now continue to 3 – Electrical Operation on next page.