Factory set for pickup at 95 percent. Provides automatic defeat of delay on loss of voltage or sustained undervoltage of emergency source, provided normal supply has been restored. Simulates normal-source failure. Indicate source to which load is connected. Pilot light indicates override status.
Initiates shutdown at remote engine-generator controls after retransfer of load to normal source.
Manufacturer's standard enamel over corrosion-resistant pretreatment and primer. Check transfer time and voltage, frequency, and time-delay settings for compliance with specified requirements. Perform dielectric strength test complying with NEMA ICS 1. Where four-pole switches are indicated, install neutral switching. Test transfer-switch products by operating them in all modes.