9 electrical transmission and substation equipment, circuit breakers, reclosers, voltage regulators, station class surge arresters, power fuses, by-pass switches, potential and current transformers, disconnect switches, switchgear and battery chargers; electrical transmission line protection and testing equipment; namely, protection relays, cable fault locators, transformer testers, dielectric testers, hv hipots, megger testers, ground fault detectors, bridges, power factor measurement devices, recloser testers, phase shifters, kwh meter testers, impulse generators, circuit breaker testers, infrared locators, and fault indicators