Description

The AH116-2 is a high-performance protection relay module manufactured by ALSTOM (now part of General Electric’s Grid Solutions business), designed for critical power system protection applications. This advanced device represents ALSTOM’s expertise in power system protection technology, providing comprehensive monitoring and control functions for electrical networks. The AH116-2 serves as a crucial component in protection schemes for generators, transformers, and transmission lines, offering sophisticated algorithms and reliable operation to ensure system stability and equipment protection. Its robust design and advanced functionality make it an essential element in modern power systems where operational safety, reliability, and precision are paramount requirements.

Engineered to meet international standards for power system protection, the AH116-2 combines advanced microprocessor technology with proven protection principles to deliver exceptional performance in demanding electrical environments. This protection relay features comprehensive protection functions including differential protection, overcurrent protection, earth fault protection, and thermal overload protection, making it suitable for a wide range of applications in power generation, transmission, and distribution systems. The AH116-2 is designed with user-friendly interfaces and flexible configuration options, allowing protection engineers to customize settings according to specific application requirements while maintaining system security and reliability.

AH116-2 ALSTOM

Technical Specifications

Parameter Name	Parameter Value
Product Model	AH116-2
Manufacturer	ALSTOM (GE Grid Solutions)
Product Type	Numerical Protection Relay
Rated Voltage	110/220V AC/DC (configurable)
Current Inputs	1A or 5A nominal (configurable)
Frequency Range	45-65 Hz
Protection Functions	Differential, Overcurrent, Earth Fault, Thermal
Number of Zones	4 configurable protection zones
Communication Interfaces	Ethernet, RS485, Fiber optic
Protocol Support	IEC 61850, Modbus, DNP3.0
Binary Inputs	8 programmable inputs
Binary Outputs	6 programmable outputs
Operating Temperature	-25°C to +70°C
Storage Temperature	-40°C to +85°C
Enclosure Rating	IP54 (front panel)
Dimensions	177 x 177 x 200 mm
Weight	2.8 kg
Certifications	IEC 60255, IEEE C37.90, UL 508

Main Features and Advantages

Advanced Protection Algorithms: The AH116-2 incorporates sophisticated protection algorithms that provide fast and selective operation for various power system faults. It features percentage biased differential protection with harmonic restraint capability, ensuring security during transformer energization while maintaining sensitivity for internal faults. The AH116-2 includes adaptive characteristics that automatically adjust protection settings based on system conditions, providing optimal performance under varying operational scenarios. The relay’s advanced signal processing capabilities ensure accurate measurement and reliable operation even in the presence of harmonics and other power quality issues.

Comprehensive Monitoring and Diagnostics: The AH116-2 offers extensive monitoring capabilities including real-time measurement of currents, voltages, power, and frequency. It features detailed event recording with time tagging, disturbance recording, and comprehensive fault analysis tools. The AH116-2 includes advanced self-supervision functions that continuously monitor hardware and software integrity, providing early warning of potential issues. Its built-in oscillographic recording capability captures detailed information about system disturbances, facilitating quick analysis and restoration following power system events.

Flexible Integration and Communication: The AH116-2 supports multiple communication protocols including IEC 61850 for seamless integration into modern digital substations. It features configurable logic programming that allows customization of protection and control functions without additional hardware. The AH116-2‘s modular design and flexible I/O configuration enable adaptation to various application requirements, while its user-friendly interface simplifies configuration and operation. The relay’s comprehensive cybersecurity features ensure secure operation in networked environments, protecting critical power infrastructure from cyber threats.

Application Field

The AH116-2 protection relay is extensively deployed in electrical power systems where reliable protection of critical assets is essential for operational security and continuity. In power generation facilities, the AH116-2 provides comprehensive protection for generators, transformers, and associated equipment, ensuring safe operation and preventing damage to expensive capital assets. Its advanced differential protection capabilities make it particularly valuable for large power transformers and generators where selective and fast fault clearance is crucial for maintaining system stability and minimizing equipment damage.

In transmission and distribution networks, the AH116-2 serves as a key component in substation automation systems, providing protection for feeders, buses, and other important network elements. The relay’s flexible configuration and communication capabilities make it suitable for both utility-scale applications and industrial power systems. The AH116-2 is also widely implemented in renewable energy installations, where it protects power conversion equipment and ensures compliance with grid connection requirements. Its robust design and comprehensive protection features make it an ideal choice for critical applications where reliability and performance are paramount.

AH116-2 ALSTOM

Related Products

AH117-2: Enhanced version with additional protection functions

AH115-2: Basic version with standard protection features

AH116-3: Advanced version with communication capabilities

AH118-2: Compact version for space-constrained applications

AH119-2: Testing and maintenance tool for the AH116-2 system

AH120-2: Display and interface unit for local operation