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INSTALLATION
(continued )
1 --- 3
RED
RED
GREEN
GREEN
observe
these lights
AMBER
Figure 1-2. Standard controls and indicators.
Functional Test
Read all i nstructions on the Wiring Diagrams and labels
affixed to the 7ADTB. Note the controlfeatures that are
provided and review their operation before proceeding.
After installing the 7ADT B check t he following:
– Bypass Handle should be in the NORMAL position.
– Isolation Handle should be in the CONN posit ion.
– CN transfer s witch should b e C (closed)
– CE transfer s witch should b e O (open)
If handles are not in correct positions, follow instructions
for Bypassing and Isolating the automati c transfer switch
in Section 3. Do not force the handles. Electrical
interlocks prevent a wrong sequence of operation.
1–VoltageChecks
First check nameplate on transfer switch; rated voltage
mustbethesameasnormalandemergencylinevoltages.
Useextremecautionwhenusingameter
to measure voltages. Do not touch power
terminals; shock, burns, or death could result !
Perform steps 1–6 at the right. Observe the status lights.
See Figure 1–2.
■ Black square means light is on.
❐ White square means light is off.
* If necessary, adjust voltage regulator on generator per the
manufacturer’s recommendations. The 7ADTB will respondonly
to rated voltage specified on the nameplate.
Now continue to 2 – 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.
Load
Disconnect
Active
2
Use an accurate voltmeter to
check phase to phase and
phase to neutral voltages pres -
entatthetransferswitchnormal
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.
Load
Disconnect
Active
4
Use an accurate voltmeter to
check phase to phase and
phase to neutral voltages pres -
ent a t the transfer switch emer-
gency source terminals.*
5
Useaphaserotationmeterto
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 s w itch (on the
generator set) in the automatic
position. Close enclosure door.
Load
Disconnect
Active