ABB FC95-22 HESG44888R22
ABB FC95-22 HESG44888R22
ABB FC95-22 HESG44888R22
ABB FC95-22 HESG44888R22
ABB FC95-22 HESG44888R22

ABB FC95-22 HESG44888R22 | Generator Protection Relay

  • Brand:​ ABB
  • ••
    Model:​ FC95-22 (Order Code: HESG44888R22)
  • ••
    Product Type:​ Multifunctional Generator Protection Relay
  • ••
    Series:​ Relion® 605 Series
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    Core Function:​ Provides comprehensive protection, control, monitoring, and automation for synchronous and asynchronous generators in utility, industrial, and commercial applications.
  • ••
    Key Specs:​ 4-phase current input, 3-phase voltage input, 16 digital inputs, 10 relay outputs, IEC 61850 communication.
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Part number: ABB FC95-22 HESG44888R22
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Description

FC95-22: Product Overview
The FC95-22 is a advanced multifunctional generator protection relay belonging to ABB’s Relion® 605 series. In power generation systems, this device is the primary intelligent electronic device (IED) responsible for safeguarding the generator prime mover from electrical faults and abnormal operating conditions. It is connected to the generator’s current transformers (CTs) and voltage transformers (VTs) to continuously monitor electrical parameters such as phase currents, voltages, frequency, and power. The relay executes complex protection algorithms to detect a wide range of fault conditions, including internal short circuits, stator ground faults, loss of excitation, overfluxing, and out-of-step operation. Upon detection of a fault, it initiates a trip signal to the generator circuit breaker and/or the prime mover to isolate the generator and prevent catastrophic damage to the asset.
Beyond pure protection, the unit integrates extensive control and monitoring functions. It belongs to a modern generation of IEDs that support the IEC 61850 standard for substation communication and engineering, enabling seamless integration into digital substation architectures. This allows for streamlined data exchange with station control systems, remote terminal units (RTUs), and asset management platforms, transforming the relay from a simple protective device into a comprehensive generator management terminal.

ABB FC95-22 HESG44888R22

ABB FC95-22 HESG44888R22

FC95-22: Technical Specifications
  • ••
    Device Model:​ FC95-22
  • ••
    Order Code:​ HESG44888R22
  • ••
    Manufacturer:​ ABB
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    Product Family:​ Relion® 605 Series
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    Current Inputs:​ 4 phases (3 phase + neutral)
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    Voltage Inputs:​ 3 phase voltages, 1 auxiliary voltage for synchrocheck
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    Binary Inputs:​ 16 programmable digital inputs
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    Output Relays:​ 10 programmable relay outputs (Form-A and Form-C contacts)
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    Communication Protocols:​ IEC 61850, Modbus® RTU/TCP, DNP3.0, IEC 60870-5-103/104
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    Communication Ports:​ 2x Ethernet (RJ-45), 2x RS-485, 1x RS-232 (front port)
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    Measurement Functions:​ V, I, P, Q, PF, Frequency, Energy
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    Protection Functions:​ Differential (87G), Stator Ground Fault (64G1, 64G2), Overcurrent (50/51), Voltage (27/59), Reverse Power (32), Loss of Excitation (40), Out-of-Step (78)
  • ••
    Control Functions:​ Automatic Synchronizing (25)
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    Power Supply:​ 24-48 VDC / 48-230 VAC/DC

    ABB FC95-22 HESG44888R22

    ABB FC95-22 HESG44888R22

Core Features & Customer Value
The relay’s comprehensive suite of protection functions, including high-impedance and 100% stator ground fault protection, provides layered defense for the generator. For plant engineers, this means a single device can replace multiple discrete electromechanical or solid-state relays, significantly reducing panel space, wiring complexity, and commissioning time. The high-accuracy metering functions eliminate the need for separate transducers, providing reliable data for operational decision-making and power quality analysis.
Support for the IEC 61850 standard is a significant value driver. It enables the relay to communicate using GOOSE (Generic Object Oriented Substation Event) messages for high-speed peer-to-peer tripping logic and SV (Sampled Values) for analog data transmission, reducing hardwiring. For system integrators, this simplifies the engineering process through the use of SCL (System Configuration Language) files, reduces installation costs, and provides future-proof interoperability with other compliant devices in the substation.
The integrated automatic synchronizing function allows for safe and precise connection of the generator to the grid. This eliminates the need for a separate synchronizer panel, reducing the overall system footprint and cost. The detailed event recorder and fault locator capture dynamic sequences during disturbances, which is invaluable for post-event analysis, reducing the mean time to repair (MTTR) after a fault occurs.
Typical Applications
A primary application is the protection of a gas turbine-driven generator in a peaking power plant. The FC95-22 monitors the generator output, providing differential protection for internal faults and reverse power protection to prevent the generator from motoring if the turbine fails. Its automatic synchronizing function ensures the unit is smoothly connected to the grid once it reaches the correct speed and voltage.
In a large industrial facility with cogeneration, the relay protects a backup diesel generator. It safeguards the generator during startup and operation, and controls the transfer of essential loads from the utility supply to the generator upon a utility outage. The relay’s load encroachment function prevents nuisance tripping during stable power swings, while its extensive monitoring capabilities provide the plant operations team with real-time data on generator performance and fuel efficiency.

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