Description
Product Description
The ALSTOM AH116-2 is a sophisticated digital input/output (I/O) module from the Alstom (now part of GE Grid Solutions and later Hitachi Energy) Micom protection and control family, specifically designed for integration within their extensive range of protective relays and bay controllers. This module, the ALSTOM AH116-2, serves as a critical interface between the intelligent electronic device (IED) and the primary plant equipment, handling both binary status inputs from field contacts (like breaker auxiliary contacts) and digital command outputs to control devices (like trip coils and lockout relays). Its robust design ensures reliable operation in the electrically harsh environments of substations and power generation facilities. Implementing the ALSTOM AH116-2.is essential for expanding the I/O capacity and functionality of compatible Alstom protection relays, enabling comprehensive monitoring and control of complex electrical circuits
Product Parameters
The technical specifications of the ALSTOM AH116-2 module are tailored for high-reliability power automation:
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Module Type: Digital Input/Output (I/O) expansion module.
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Input Channels: Typically provides a configurable number of binary/digital inputs (e.g., 16), accepting standard DC voltage levels (like 24V, 48V, 110V, or 220V DC) for status monitoring.
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Output Channels: Typically provides a configurable number of relay outputs (e.g., Form-A or Form-C contacts) for command execution, rated for interrupting specific voltage and current levels.
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Isolation: Features high-voltage isolation (e.g., 2-4 kV) between field connections, the internal circuitry, and the communication bus to protect the relay and ensure safety.
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Communication Interface: Connects to the main relay or controller unit via a proprietary high-integrity backplane or serial communication bus.
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Power Supply: Usually powered from the host relay’s internal supply or an external DC source, with specifications matching common station battery voltages.
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Operating Temperature: Designed for a wide industrial temperature range suitable for substation environments (e.g., -25°C to +70°C).
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Mounting: Designed for DIN rail mounting or direct mounting within a specific Alstom relay casing.
Advantages and Features
The ALSTOM AH116-2 offers distinct benefits for protection and control systems:
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High Reliability & Noise Immunity: Engineered with robust filtering and isolation, the ALSTOM AH116-2 accurately interprets field signals and issues commands even in the presence of heavy electromagnetic interference common in switchyards.
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Seamless Integration: As a dedicated expansion module, it integrates perfectly with compatible Alstom Micom relays (e.g., Px40, Px30 series), with configuration performed within the same dedicated software (e.g., Micom S1 Studio), ensuring full functionality and diagnostics.
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Flexible Configuration: Input voltage thresholds and output relay modes can often be configured via software or hardware settings, allowing adaptation to various substation DC system voltages and control schemes.
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Modular & Expandable Design: Allows users to expand the I/O points of a protection relay without needing a completely new device, offering a cost-effective and flexible system architecture.
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Proven in Critical Infrastructure: The design principles behind the ALSTOM AH116-2 are proven in thousands of installations worldwide for transmission, distribution, and industrial power systems.
Application Cases in Industry
This I/O module is fundamental in electrical power infrastructure:
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Electrical Transmission & Distribution Substations: Used within line differential relays (e.g., Micom P443) or busbar protection relays (e.g., Micom P633) to acquire breaker/disconnector positions and issue trip/close commands.
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Power Generation (Plant Electrical Systems): Integrated into generator protection relays or feeder management relays to monitor turbine auxiliaries, issue synchronizing commands, or control station service equipment.
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Industrial Power Management: Employed in large industrial plants (e.g., steel, cement) within motor protection relays or bay controllers for sequencing and interlocking of high-voltage motors and capacitor banks.
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Railway Electrification: Used in protection and control systems for AC and DC traction power supply to monitor section isolators and control circuit breakers.
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Renewable Energy Plants: Incorporated in protection schemes for solar inverter stations or wind farm collector substations for equipment status and control.
Comparisons with Competing Products
When compared to generic digital I/O modules or those from other relay manufacturers, the ALSTOM AH116-2 provides system-specific value:
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Native Protocol & Software Integration: Unlike universal I/O blocks that require separate mapping, the ALSTOM AH116-2 is recognized natively by the host relay’s firmware, allowing direct use of its points in protection logic, SCADA communication, and local HMI without complex gateway configuration.
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Guaranteed Performance & Safety: Its isolation ratings, response times, and fail-safe behavior are certified as part of the overall protective relay system, which is crucial for safety and regulatory compliance in power systems.
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Unified Diagnostics: Faults or abnormalities on the AH116-2 module (e.g., loss of auxiliary power, watchdog timeout) are reported directly through the relay’s standard diagnostic and event logging channels, providing a consolidated view of health.
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Long-Term Compatibility & Support: As a genuine Alstom/Hitachi Energy part, it is supported throughout the long lifecycle of the protection relay, with guaranteed compatibility for firmware updates and replacement parts.
Selection Suggestions and Precautions
Careful planning is essential for correct implementation:
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Verify Host Relay Compatibility: Absolutely confirm that the ALSTOM AH116-2 is a valid and compatible expansion module for your specific Alstom Micom relay model and hardware version. Consult the relay’s installation manual or configuration guide.
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Match Voltage Ratings: Precisely select the module variant with input voltage ratings matching your station’s DC control battery voltage (e.g., 110V DC vs. 220V DC). Applying an incorrect voltage can damage the module.
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Check Output Contact Rating: Verify that the output relay contact ratings (voltage, current, breaking capacity) are suitable for the connected load (e.g., trip coil of a circuit breaker). Do not exceed these ratings.
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Configuration is Mandatory: Simply installing the ALSTOM AH116-2 is not enough. Its channels must be properly configured, mapped, and enabled within the relay’s configuration software for them to become operational.
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Observe Safety Procedures: Installation or replacement must be performed with the relay and all associated equipment fully de-energized and in accordance with electrical safety rules (lock-out/tag-out).
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