Electrical Testing

Stand-by Generators

Standby generators are a staple wherever there are critical systems that rely on a constant supply of electricity. These generators are an important power source in a temporary outage or emergency, and as such, regular maintenance is required. Breakdowns also happen, and that’s why it’s so important to have a trustworthy contractor who can maintain, repair, and offer advice on the different types of generators.

Our knowledgeable technicians are skilled in the repair and maintenance of these versatile machines, as well as being able to set them up to the required systems and advise their owners on their operation and upkeep. Equally important to an emergency power system is the transfer means. Whether it is paralleling gear, peak shaving controls, or synchronization relays our technicians can maintain and test your equipment to ensure it will be available and operate when is should as it should.

Prime Mover

Generators have one thing in common they rely on some means of mechanical power to convert into electrical energy that can be used by your electrical system. Routine maintenance on this prime mover is critical for the proper operation of a generator system to provide power reliably.


This is the device that actually outputs electrical power to your system when spun by the prime mover. Generators have winding similar to those of an electric motor. As such they are treated from an electrical maintenance standpoint as you would your critical electrical motors. Resistance measurements should be taken across bolted connections. Insulation resistance tests should be performed in accordance with ANSI/ IEEE Standard 43.

Manual/Automatic Transfer Switch

Transfer switches change the electrical path from normal (utility power) to emergency (generator power). It is easy to see how important this device would be during an emergency. The International Electrical Testing Association ANSI/NETA MTS-2011 Standard for Maintenance Testing Specifications for Electrical Power Equipment and Systems recommends visual and mechanical inspections as well electrical tests. The electrical tests should be at minimum: contact resistance across each switchblade assembly; insulation resistance tests for one minute on each pole, phase-to-phase and phase-to-ground with the switch closed and across each open pole; and dielectric withstand test.