Description
GE 889-E-P5-P5-B5-H-R-R-A-A-A-G-A-P-F-A-SE-N-W-B — Technical Specification
Product: Multilin 889 Generator Protection Relay — Fully Specified Configuration Code
Manufacturer: GE (General Electric) — now part of GE Vernova
Primary Application: A fully-featured, high-end numerical generator protection relay designed for the comprehensive protection, monitoring, and control of medium to large generators (hydro, steam, gas, combined-cycle) in utility, industrial, and independent power plants.
1. Core Overview & Product Context
The GE Multilin 889 is a flagship generator management relay. This long alphanumeric string is not a model number but a complete ordering code or detailed product specification. Each segment (separated by hyphens) defines a specific hardware, firmware, or functional option. This specific configuration represents a highly capable, communication-rich, and redundant system tailored for critical generator protection.
Key Concept: The 889 relay consolidates dozens of protection, control, and monitoring functions into one device, replacing multiple discrete relays and meters.
2. Key Features & Functions (Based on this Configuration)
This configuration implies a relay equipped for the most demanding applications:
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Comprehensive Generator Protection: 100% stator differential (87G), ground fault (64G1, 64G2), loss of field (40), negative sequence (46), overexcitation (24), out-of-step (78), voltage/frequency protection (81, 59, 27), and many more.
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High Availability Design: Dual, redundant power supplies (P5, P5) and dual, redundant communication modules (R, R) maximize uptime.
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Advanced Communications: Supports modern substation automation protocols: IEC 61850 (A) for station bus and potentially process bus (Sampled Values), and DNP3 (G) for wide-area network SCADA communication.
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Extensive I/O: The
Poption suggests ample binary I/O for breaker control, alarms, and interlocking, plus analog inputs for additional sensors (e.g., temperature, vibration). -
Enhanced Diagnostics: Large Sequential Events Recorder (
SE) for precise fault analysis and disturbance reporting.
3. System Integration
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Role: Serves as the primary generator protection relay, interfacing directly with Generator CTs, VTs, and the generator circuit breaker.
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Communication: Acts as an IEC 61850 intelligent electronic device (IED) on the station LAN, reporting to the local HMI and SCADA system via MMS, while also sending trip commands via GOOSE. The DNP3 port provides parallel SCADA integration.
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Engineering & Configuration: Configured using GE’s Enervista UR Setup software. All protection settings, logic schemes (FlexLogic™), and communication mapping are defined here.
4. Typical Deployment
This specific configuration is suited for:
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Large Steam or Gas Turbine Generators in base-load power plants.
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Hydroelectric Generators with critical availability requirements.
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Major Industrial Plant Generators (e.g., pulp & paper, chemicals).
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Applications requiring compliance with strict grid codes, where redundant communications and high-reliability are mandated.
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