GE Multilin SR489-P5-HI-A20-E Generator Management Relay with Enhanced LCD Display

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Product Overview

GE Multilin SR489-P5-HI-A20-E is a high-performance digital generator management and protection relay within the famous 489 series, designed for comprehensive protection, monitoring, metering and control of synchronous and induction generators in power plants, cogeneration systems and heavy industrial power facilities.

Model suffix breakdown:

• SR489: Generator management relay series
• P5: 5 Amp phase CT secondary input
• HI: Wide-range high voltage control power supply
• A20: Four configurable 4–20mA analog output channels
• E: Enhanced large LCD front panel for improved local readability and operation

This relay integrates stator differential, 100% stator ground fault, loss of excitation, reverse power, overexcitation, over/under voltage, over/under frequency and negative sequence protection. It supports RTD temperature monitoring, fault waveform capture, event logging and multi-protocol communication for SCADA/DCS integration. GE has discontinued the entire 489 relay family. We supply surplus and fully refurbished SR489-P5-HI-A20-E spare parts for legacy generator control cabinet maintenance, avoiding costly full system retrofit.

Key Features

✅ Full suite of generator-specific protection functions, stator differential & 100% stator ground fault protection ✅ P5 5A CT secondary input, compatible with standard 5A generator current transformers ✅ HI universal control power: 70–265V AC / 90–300V DC, 48–62Hz ✅ A20 option: 4 isolated programmable 4–20mA analog outputs to DCS / PLC ✅ E option: Enhanced large LCD display with keypad for local parameter setup and fault review ✅ Up to 12 RTD inputs for stator winding and bearing temperature monitoring ✅ 9 digital inputs and 6 relay trip/alarm output contacts ✅ Built-in fault event recorder and oscillographic waveform capture for post-fault diagnostics ✅ Communication: RS485, RS232, Modbus RTU, DNP3.0 ✅ IRIG-B time synchronization for precise event timestamping ✅ Panel cutout mounting, robust hardware for substation and power plant control rooms

Technical Specifications

• Model: SR489-P5-HI-A20-E (489-P5-HI-A20-E)
• Brand: GE Multilin / GE Vernova / GE Grid Solutions
• Product Family: 489 Generator Management Relay
• CT Secondary Input: 5A (P5)
• Control Power (HI): 70–265V AC, 90–300V DC, 48~62Hz
• Analog Output: 4 × 4~20mA (A20)
• Display: E = Enhanced large LCD display
• RTD Input: Max 12 channels
• Digital Inputs: 9
• Output Relays: 6 (trip & alarm contacts)
• Communication: RS232, RS485, Modbus RTU, DNP3.0, IRIG-B time sync
• Frequency: 25 / 50 / 60 Hz
• Mounting: Panel mount
• Operating Temperature: -40℃ ~ +70℃
• Humidity: 5% ~95% RH, non-condensing
• Protection Rating: Front IP54, rear IP30
• Certifications: CE, UL, IEC 60255

Applications

GE Multilin SR489-P5-HI-A20-E relays are used for small and medium generator asset protection:

• Thermal power plant generator protection panels
• Hydroelectric generator control & protection
• Industrial cogeneration / CHP generator sets
• Oil & gas on-site power generation systems
• Waste-to-energy power station generators
• Replacement spare parts for legacy GE 489 generator protection cabinets

Product Supply Information

We provide fully tested GE Multilin SR489-P5-HI-A20-E generator management relays for global power and automation buyers. The SR489 series is discontinued by GE. Available stock includes surplus and refurbished units.

• Complete functional, protection logic and communication testing before shipment
• 12-month warranty
• Anti-static packaging, secure export carton
• Shipping options: DHL, FedEx, UPS, sea freight
• Trade terms: EXW, FOB, CIF, DDP

FAQ

Q1: What does SR489-P5-HI-A20-E suffix mean?

A: P5=5A CT secondary; HI=high wide-range control power; A20=four 4-20mA analog outputs; E=enhanced large LCD display.

Q2: Is discontinued?

A: Yes, GE Multilin has discontinued the 489 generator relay series. We supply surplus and fully tested replacement units for legacy generator protection systems maintenance.

Q3: What protection functions does SR489-P5-HI-A20-E offer?

A: It includes stator differential, 100% stator ground fault, loss of excitation, reverse power, overexcitation, overvoltage, undervoltage, overfrequency, underfrequency and negative sequence protection.

Q4: What communication protocols are supported?

A: RS485 Modbus RTU, DNP3.0, RS232, and IRIG-B time synchronization.

Q5: What is the difference between SR469 and SR489 relays?

A: SR469 is motor management relay for large motors; SR489 is dedicated generator management relay with generator differential and stator ground protection functions.

GE BRAND

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