Overview

The GE Multilin SR489‑P1‑LO‑A20‑E is part of the 489 Generator Management Relay family, which offers microprocessor‑based protection and monitoring for small to medium‑sized generators. This relay is designed to detect and respond to electrical and mechanical faults, ensuring safe generator operation under varying load conditions.

It supports thermal modeling, current imbalance detection, ground fault protection, loss of field, over/under voltage, and frequency protection, making it a versatile solution for generator management. The relay also integrates with plant automation systems through Modbus and DNP3 communications, enabling seamless SCADA/DCS connectivity.

Technical Data

Typical Applications

• Power generation plants: Protecting synchronous and induction generators.

• Petrochemical facilities: Ensuring reliable generator operation under variable loads.

• Mining and heavy industry: Monitoring generator health and preventing costly downtime.

• Manufacturing plants: Providing real‑time diagnostics and safe generator startup.

Key Features

• Microprocessor‑based protection for advanced fault detection.

• Enhanced LCD interface for configuration and monitoring.

• Flexible communication protocols for integration into SCADA/DCS systems.

• Comprehensive monitoring including voltage, current, frequency, and thermal conditions.

• Programmable outputs for trips and alarms.

FAQ

Q1: What is the primary role of the SR489‑P1‑LO‑A20‑E relay?

A1: It protects and manages synchronous and induction generators in industrial applications, ensuring safe and efficient operation.

Q2: How does it improve reliability?

A2: By providing advanced fault detection and real‑time monitoring, it reduces generator failures and downtime, enhancing system reliability.

Q3: Can it integrate with automation systems?

A3: Yes, it supports Modbus and DNP3 protocols for seamless integration with SCADA and DCS systems.

Q4: What type of CT input does it use?

A4: It uses 1A Phase CT secondaries for current measurement.

Q5: Why choose GE Multilin relays?

A5: GE Multilin relays offer proven reliability, advanced communication, and robust protection, making them a trusted choice worldwide for power generation and industrial applications.