GE

Main Functions

Comprehensive multi‑function generator protection: Integrates ANSI‑standard protection elements including stator differential (87G), loss‑of‑excitation (40), reverse‑power (32), negative‑sequence overcurrent (46), voltage‑restrained overcurrent (51V), over‑/under‑voltage (59/27), over‑/under‑frequency (81O/81U), stator ground fault (64G). It executes trip or alarm logic to isolate electrical faults and avoid generator damage.More products: www.plcva.com
High‑precision electrical metering: Measures real‑time generator parameters: three‑phase voltage, current, active power, reactive power, power factor, frequency and energy values. It also supports RTD temperature monitoring for stator windings and generator bearings.

GE Multilin SR489‑P1‑HI‑A20‑E Generator Management Intelligent Electronic Device

Generator control and synchronism check: Provides synchronizing check function (25) for generator‑grid paralleling; supports programmable logic, digital input status acquisition and relay contact outputs for local interlock, trip and auxiliary equipment control.
Fault recording & event logging: Captures sequence‑of‑events (SOE) records and oscillographic fault waveform data. It stores fault time stamps, alarm and trip records for post‑fault analysis and troubleshooting.
Signal output capability: Provides configurable 4‑20 mA analog outputs for transmitting process values to DCS / SCADA systems; multi‑form‑C relay outputs for trip, alarm and interlock loops.
Digital communication: Equipped with RS‑232 and RS‑485 interfaces supporting Modbus‑RTU protocol. It enables remote configuration, parameter reading, status monitoring and fault diagnosis via upper‑level host software.
Local human‑machine interface: Enhanced LCD display and keypad for on‑site parameter setting, real‑value viewing, alarm checking and manual operation without external software.
Hardware self‑diagnosis: Continuously monitors internal hardware, CT/PT loop faults and sensor failures; generates local and remote fault alarms to improve system maintainability.

GE Multilin SR489‑P1‑HI‑A20‑E Generator Management Intelligent Electronic Device

Target equipment: Medium‑small synchronous generators, induction generators, synchronous condensers, emergency backup power generating units.
Applicable industries: Captive power plants, combined‑cycle power stations, oil & gas facilities, petrochemical plants, heavy‑industry self‑supply power stations, data‑center backup power systems, marine power generation systems.
Purpose: Acts as an all‑in‑one protection‑monitoring‑control IED for generator assets. It detects electrical and thermal faults, triggers reliable tripping to prevent generator catastrophic failures, supports safe generator‑grid paralleling, delivers real‑time operating data to plant control systems, and satisfies power‑system safety operation and predictive‑maintenance requirements. It serves as critical spare‑part for existing running generator protection systems.