Checking Manual Transfer Switch Operation; Operational Checks; Electrical Checks; Testing Generator Under Load - Generac Power Systems Protector Series Installation Manuallines

Checking Manual Transfer Switch
Operation
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with
live terminals will result in death or serious
injury.
See Manual Transfer Operation section of owner's man-
ual for procedures.

Operational Checks

NOTE: The following procedures require special tools
and skills. Contact an IASD to perform these tasks.

Electrical Checks

DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with
live terminals will result in death or serious
injury.
NOTE: Verify all power and control wiring is correctly ter-
minated in the generator and corresponding location in
transfer switch. For three-phase applications, verify gen-
erator phase rotation matches utility phase rotation L1-
L2-L3 or L3-L2-L1. Validate phase rotation L1-L2-L3 or
L3-L2-L1 with an phase rotation tester (if three-phase).
NOTE: To correct phase rotation, interchange any two
leads.
Proceed as follows to complete electrical checks:
1. Verify generator is in OFF mode. Red LED above
OFF on control panel illuminates to verify system is
OFF.
2. Verify generator MLCB (generator disconnect) is
OFF (OPEN).
3. Turn off all circuit breakers/electrical loads to be
supplied by generator.
4. Turn on utility power supply to transfer switch using
the means provided (such as a utility MLCB).
5. Use an accurate AC voltmeter to verify utility power
source voltage across transfer switch terminals N1
and N2 (and N3 if three-phase). Normal line-to-line
voltage should be equivalent to rated unit voltage.
Validate (if three-phase) phase rotation L1-L2-L3 or
L3-L2-L1 with a phase rotation tester.
6. Verify utility power source voltage across terminals
N1 and N2 (and N3 if three-phase) and transfer
switch neutral lug.
Installation Guidelines For Spark-Ignited Stationary Generators
7. Turn off utility power supply to transfer switch when
utility supply voltage is compatible with transfer
switch and load circuit ratings.
8. Verify both auxiliary shutdown switches are ON (I).
9. Press MANUAL on control panel keypad to crank
and start engine.
10. Allow engine to warm up for approximately five
minutes. Set generator MLCB (generator discon-
(000129) nect) to ON (CLOSED).
11. Connect an accurate AC voltmeter and a fre-
quency meter across transfer switch terminal lugs
E1 and E2 (and E3 if three-phase).
12. Successively connect the AC voltmeter test leads
across terminal lugs E1, E2, (and E3 if three-
phase) and neutral. Voltage reading in each case
should match utility voltage reading. If system is
three-phase,
matches utility phase rotation.
13. Set generator MLCB (generator disconnect) to
OFF (OPEN).
14. Press OFF on control panel to shut engine down.
IMPORTANT NOTE: Do not proceed unless generator
AC voltage and frequency are correct and within
(000129)
stated limits.

Testing Generator Under Load

Electrocution. Do not manually transfer under load.
Disconnect transfer switch from all power sources
prior to manual transfer. Failure to do so will result in
death or serious injury, and equipment damage.
Proceed as follows to test generator with electrical loads
applied:
1. Verify generator is in OFF mode. Red LED above
OFF on control panel illuminates to verify system is
OFF.
2. Turn off all breakers/electrical loads to be supplied
by generator.
3. Turn off utility power supply to transfer switch,
using the means provided (such as a utility MLCB).
4. Manually set transfer switch to STANDBY, i.e., load
terminals connected to generator's E1 and E2 (and
E3 if three-phase) terminals. Transfer switch oper-
ating lever should be down in standby position.
5. Verify both auxiliary shutdown switches are ON (I).
6. Press MANUAL on control panel. Engine should
crank and start immediately.
7. Allow engine to warm up for approximately five
minutes.
8. Set generator MLCB (generator disconnect) to ON
(CLOSED).
Control Panel Startup / Testing
verify generator phase
DANGER
rotation
(000132)
39