Product Overview

• Part No: NRD108031, TRVC070999000 BOTTOM
• Brand: ALSTOM

• Category: Turbine Valve Control Bottom Base ModuleNRD108031 TRVC070999000 BOTTOM is the lower base plug-in board of ALSTOM TRVC series dual-layer turbine valve control assembly. It cooperates with the upper control board to provide power distribution, signal routing and drive output circuits for LVDT position feedback and hydraulic valve actuators. The board converts control commands into driving signals for electro-hydraulic converters, processes actuator feedback signals and executes hardware-level interlock protection. Designed as a bottom layer Eurocard PCB, it forms a complete closed-loop position control unit together with the top control module. Built-in filtering and surge protection ensure stable operation under severe electromagnetic interference inside turbine governing cubicles. It is an original obsolete spare used for maintenance of steam turbine governing systems.

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Core Features

• Bottom base board for TRVC series two-tier valve control assembly
• Power supply distribution, signal routing and actuator drive output circuit
• Interface circuit for LVDT position feedback signal transmission
• Hardware interlock and overcurrent protection for valve drive loops
• Standard Eurocard rack plug-in structure for convenient field replacement
• Reinforced multilayer PCB with ESD and transient overvoltage suppression

• Passed EMC, vibration and wide-range thermal cycling reliability qualification

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Technical Specifications

• Operating Supply: 24 VDC
• Compatible Sensor: LVDT position transducer
• Operating Temperature: -10°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Form Factor: Standard Eurocard rack plug-in printed circuit board

• Protection Class: IP20 when installed inside control cabinet

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Compatibility & Application

• Matched with ALSTOM TRVC upper valve control boards for steam turbine governing systems
• Widely deployed in thermal power plants, combined-cycle power stations and captive power facilities
• Used for closed-loop position control of turbine main steam valves, governor valves and bypass actuators