Transfer Switch Manual

Operation
12 Automatic Transfer Switch Owner’s Manual
contacts are closed in the GENERATOR (STANDBY)
position. No further action is required. If the handle is
UP, proceed with Step 1.
1. With the handle inserted into the movable contact
carrier arm, move the handle DOWN. Be sure to
hold on to the handle as it will move quickly after
the center of travel.
2. Remove manual operating handle from movable
contact carrier arm. Return handle to storage
bracket.
4.2.3— Return to Utility Source Side
1. Manually actuate switch to return manual operating
handle to the UP position.
2. Remove manual operating handle from movable
contact carrier arm. Return handle to storage
bracket.
4.3 — Voltage Checks
4.3.1— Utility Voltage Checks
1. Turn ON the UTILITY power supply to the transfer
switch using the utility service disconnect circuit
breaker.
2. With an accurate AC voltmeter, check for correct
voltage. Measure across ATS terminal lugs N1 and
N2; N1 to NEUTRAL and N2 to NEUTRAL.
4.3.2— Generator Voltage Checks
1. On the generator panel, select the MANUAL mode
of operation. The generator should crank and start.
2. Let the generator stabilize and warm up at no-load
for at least five minutes.
3. Set the generator's main circuit breaker (CB1) to its
ON or CLOSED position.
4. With an accurate AC voltmeter and frequency
meter, check the no-load, voltage and frequency.
Measure across ATS terminal lugs E1 to E2; E1 to
NEUTRAL and E2 to NEUTRAL.
5. When certain that generator supply voltage is cor-
rect and compatible with transfer switch ratings,
turn OFF the generator supply to the transfer
switch.
6. Set the generator main circuit breaker (CB1) to
OFF or OPEN.
7. On the generator panel, select the OFF mode to
shut down the generator.
NOTE: Do NOT proceed until generator AC output
voltage and frequency are correct and within stated
limits. If the no-load voltage is correct but no-load
frequency is incorrect, the engine governed speed
may require adjustment. If no-load frequency is cor-
rect but voltage is not, the voltage regulator may
require adjustment.
4.4 — Generator Tests Under Load
1. Set the generator main circuit breaker to OFF or
OPEN.
2. Set the utility service disconnect circuit breaker to
OFF or OPEN.
3. Manually actuate the transfer switch main contacts
to the emergency (Standby) position. See “Manual
Operation”.
4. To start the generator, select the MANUAL mode of
operation. When engine starts, let it stabilize for a
few minutes.
5. Set the generator main circuit breaker to ON or
CLOSED. The generator now powers all LOAD cir-
cuits. Check generator operation under load as fol-
lows:
• Turn on electrical loads to the full rated wattage/
amperage capacity of the generator. DO NOT
OVERLOAD.
(000129)
DANGER
Electrocution. High voltage is present at transfer
switch and terminals. Contact with live terminals
will result in death or serious injury.
(000123)
DANGER
Electrocution. Turn utility supply OFF before
working on utility connections of the transfer
switch. Failure to do so will result in
death or serious injury.
Frequency 60-62 Hz
Terminals E1 to E2 240-246 VAC
Terminals E1 to NEUTRAL 120-123 VAC
Terminals E2 to NEUTRAL 120-123 VAC
(000129)
DANGER
Electrocution. High voltage is present at transfer
switch and terminals. Contact with live terminals
will result in death or serious injury.