GE Multilin G650-B-F-B-F-2-G-0-H-I-H | Advanced Generator Protection System

The GE Multilin G650 is a member of the UR (Universal Relay) family, specifically designed for the comprehensive protection, control, and monitoring of small to medium-sized generators. The part number G650BFBF2G0HIH represents a highly customized configuration, featuring specific power supply ratings, communication protocols, and I/O expansion modules tailored for complex power plant environments. This relay integrates high-speed peer-to-peer communication and advanced logic to ensure maximum stability and protection for synchronous generators.

Part Number Breakdown (Configuration)

To understand this specific unit, we break down the alphanumeric code:

  • G650: Base Model (Generator Protection System)

  • B: CPU/Processor Option

  • F: Software/Functional Level (Advanced)

  • B: Mount/Case Type

  • F: User Interface/Display Option

  • 2: Power Supply Option (Typical 125/250 V DC or 120/230 V AC)

  • G: Communication Slot 1 (Standard Ethernet/RS485)

  • 0: Communication Slot 2

  • H: I/O Module Slot 1

  • I: I/O Module Slot 2

  • H: I/O Module Slot 3

Product Specifications

  • Model: G650 (UR Series)

  • Protection Functions: 21G (Phase Distance), 59N (Neutral Overvoltage), 81 (Over/Under Frequency), 32 (Directional Power), 40 (Loss of Excitation), 87G (Generator Differential).

  • Monitoring: High-accuracy metering (V, I, P, Q, Hz), Event Recording (1024 events), Oscillography (64 samples/cycle).

  • Communications: Supports IEC 61850, Modbus RTU/TCP, DNP 3.0, and PRP (Parallel Redundancy Protocol).

  • Display: Vacuum Fluorescent Display (VFD) or Color LCD with programmable LEDs.

  • Dimensions: Standard 19-inch rack mount (4U height).

  • Operating Temperature: -40°C to +60°C.

GE DIGITAL ENERGY MULTILIN G650BFBF2G0HIH

Application Fields

The G650 is the primary protection choice for Hydroelectric Plants, Thermal Power Stations, and Industrial Cogeneration Units. It is specifically designed to protect synchronous generators from internal faults (short circuits) and abnormal operating conditions such as unbalanced loads, motoring (reverse power), and loss of field. It is frequently used as a “one-box” solution where it handles not only protection but also the synchronization and basic automation logic of the generator breaker.

Product Instructions

  1. Installation: The G650 must be installed in a standard 19-inch rack. Ensure that the chassis is properly grounded using the rear grounding stud to protect against electromagnetic interference.

  2. Wiring: Connect Current Transformers (CTs) and Potential Transformers (PTs) to the designated terminal blocks. Double-check the polarity of the CTs to ensure correct differential (87G) and directional power (32) protection.

  3. Programming: Use the EnerVista UR Setup software via the front-panel RS232 port or the rear Ethernet port. Settings should be calculated based on the generator’s nameplate data and reactance values.

  4. Commissioning: Perform a secondary injection test using a relay test set to verify that the trip logic and communication reporting are functioning correctly before synchronizing the generator to the grid.

FAQ: Common Questions and Answers

Q: Can this relay be used for motor protection? A: While the G650 is optimized for generators, the Multilin M60 is the sibling model specifically designed for motor protection. However, many G650 functions overlap with those needed for very large synchronous motors.

Q: What is the benefit of the IEC 61850 protocol in this module? A: IEC 61850 allows the G650 to communicate with other substation devices (like the C60 or F60) using GOOSE messaging, enabling high-speed interlocking and automated restoration without physical copper wiring.

Q: Does the G650 support “Bumpless” communication redundancy? A: Yes, if configured with the appropriate communication module (often indicated in the part number), it supports PRP/HSR, ensuring that a single network cable failure does not interrupt data flow to the SCADA system.

For technical datasheets and availability regarding the GE Multilin G650BFBF2G0HIH, please reach out to our engineering support team.

Recommended Similar Models

  • GE Multilin G30 (Small Generator Protection)

  • GE Multilin G60 (Advanced Large Generator Protection)

  • GE Multilin C60 (Breaker Management and Protection)

  • GE Multilin F650 (Digital Bay Controller/Feeder Protection)

  • GE Multilin 850 (Next-Gen Feeder/Generator Protection)

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