Krishna Electric Works

A vibrating reed frequency meter is an analog, mechanical resonance instrument used to measure the frequency of AC power supplies. It consists of multiple steel reeds, each tuned to a specific natural resonance frequency, placed near an electromagnet. The reed that vibrates with the maximum amplitude indicates the current's frequency.

An Earth Leakage Relay (ELR) is a protection device that monitors electrical systems for leakage current flowing to the ground. Unlike a standard circuit breaker (MCB) that reacts to overloads or short circuits, an ELR is designed to sense very small current imbalances—as low as 30mA—that indicate insulation failure or accidental contact with a live part.