Pickup frequency is adjustable from 90 to 100 percent of nominal. 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.