Basler Electric ES-47N 27 3AB1N0N0 Protection Relay

Basler Electric ES-47N/27 Phase Balance Relay protects three-phase systems from phase unbalance, phase loss, and phase reversal/sequence faults, with undervoltage protection included on the ES-47N/27 model. The ES-47N/27 (model 3AB1N0N0) is designed for 120 VAC nominal input and supports 3-phase, 3-wire connections with a 0–20 second undervoltage timing and 50/60 Hz operation. Microprocessor-based circuitry provides precise protection and includes internal diagnostics that annunciate when relay function or accuracy is compromised. Typical applications include protection and monitoring for generators, transformers, distribution systems, auto-transfer schemes, and motor drives where maintaining phase balance is critical.