Product Overview

• Part No: N70032702L
• Brand: ALSTOM (GE Grid Solutions successor)

• Category: Excitation System Main Control Processor ModuleN70032702L serves as the core main processing unit of ALSTOM UNITROL®1000 AVR platform. It integrates embedded microcontroller, analogue signal conditioning circuits, protection algorithm logic and internal communication interfaces. The module samples generator voltage, current and frequency signals in real time, executes closed-loop voltage regulation control, fault detection and protection logic, and communicates with peripheral I/O boards to maintain stable generator terminal voltage and safe grid synchronisation. It is a critical spare component for generator excitation cabinets in thermal power plants and hydro power stations.

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Core Features

• High-speed embedded processor for real-time AVR closed-loop regulation and excitation control
• Multi-channel analogue input for voltage, current and frequency measurement
• On-board protection logic for excitation system abnormal condition monitoring
• Internal bus interface for data exchange with auxiliary I/O modules
• Built-in surge filtering and ESD protection for harsh power plant environments
• Rugged rack-mounted PCB design supporting direct plug-in installation

• Passed thermal cycling, vibration and EMC reliability qualification tests

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Technical Specifications

• Operating Supply: 24 VDC
• Operating Temperature: -10°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Form Factor: Standard rack plug-in circuit board

• Protection Class: IP20 (when installed inside cabinet)

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Compatibility & Application

• Fully compatible with ALSTOM UNITROL®1000 automatic voltage regulator excitation system
• Widely deployed in thermal power plants, hydropower stations and captive power facilities
• Used as main control CPU for synchronous generator excitation and voltage regulation systems