Emerson ASCO 7000 - Manual (Page 5)

INSTALLATION (continued)
1---3
RED
RED GREEN
GREEN
observe
these lights
Figure 1-4. 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. 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 1–4.
Q Black square means light is on.
S White square 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.
Note
Refer to Section 3 of Group 5 Controller User’s Guide
381333–126 for how to display the Status of the ATS
and the Voltage and Frequency of each source.
Now continue to 3 – Electrical Operation on next page.
1
Close the normal source circuit
breaker. The Transfer Switch
Connected To Normal and the
Normal Source Accepted 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 &
Emergency Source Accepted
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.