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017-882-B0-001 Rev. E (06/2018)
3.0 Operation, Continued
3.8.3 Using a Truck-mounted Inverter or Generator
To use a truck-mounted inverter or generator, follow the steps listed in
Section 3.8.2, AC Powering
with the additional
step of grounding the truck. Run the ground wire from an unpainted point on the truck chassis to either a driven ground
rod or strand ground to complete the grounding circuit. The rubber tires on the truck insulate it from being grounded in all
but the most exceptional circumstances.
Ground the vehicle before operating a truck inverter or truck-mounted generator. Failure to
do so places service personnel at risk for electric shock.
WARNING! ELECTRICAL HAZARD
4.
After the generator is properly grounded, unplug the power supply from the convenience outlet inside the
enclosure and plug the power supply input cable into the generator output. Use an outdoor rated approved
extension cord. Recommend min 12 AWG for 120V, 14AWG for 240V installations.
5. Start and operate the generator according to the generator operation manual.
6. If the generator kilowatt rating is twice the kilowatts used by the power supply indicated on the Smart Display,
leave the battery breaker
on and the generator will charge the batteries. If the generator fails, the power supply
will continue to provide battery backup. If the generator output is not approximately twice the kilowatt rating
indicated on the Smart Display, switch the battery breaker OFF to reduce the load on the generator if battery
backup of the system is unavailable.
7. In either case, after the power from the generator is applied to the power supply, use the Smart Display to
increase the Frequency Input Tolerance to ±6Hz from the normal ±3Hz, inhibiting the power supply from switching
to battery backup if the generator occasionally does not operate on the proper frequency. It is not uncommon for
smaller (4 kilowatt or less) sized generators to get “off frequency” due to the step loading of the power supply.
