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3A99108G01

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3A99108G01
June 05, 2026

3A99108G01

Part No.: 3A99108G01 (QRS Card), Westinghouse/Emerson original Q-Line series LVDT Excitation & Signal Conditioning Board, matching accessory card for 3A99101G01/G02 QSR servo control card under WDPF DCS turbine governing EH system, US original discontinued production; suffix G means standard factory assembled PCB version. It forms a complete turbine closed-loop control set together with QSR(3A99101Gxx), QRF(3A99109G01), QRD(3A99114Gxx) series modules, widely installed in steam turbine VME control rack of coal-fired & nuclear power plants. Available stock: fully tested refurbished modules and used original dismantled spares.

Description

1. Product Introduction

Part No.: 3A99108G01 (QRS Card), Westinghouse/Emerson original Q-Line series LVDT Excitation & Signal Conditioning Board, matching accessory card for 3A99101G01/G02 QSR servo control card under WDPF DCS turbine governing EH system, US original discontinued production; suffix G means standard factory assembled PCB version. It forms a complete turbine closed-loop control set together with QSR(3A99101Gxx), QRF(3A99109G01), QRD(3A99114Gxx) series modules, widely installed in steam turbine VME control rack of coal-fired & nuclear power plants. Available stock: fully tested refurbished modules and used original dismantled spares.

2. Core Function & Technical Parameters

  • Main Function: Generate stable AC excitation source for field 2AC-type LVDT displacement sensors, filter, amplify and condition raw weak LVDT feedback signals before transmitting processed standard signals to 3A99101G01/G02 QSR servo card for closed-loop position control of turbine hydraulic actuators/governing valves.

  • Channel configuration: Matches 4-channel LVDT input of QSR card; built-in high-precision sine wave excitation circuit for LVDT power supply.

  • Bus Interface: Standard VME backplane bus, powered and communicates via cabinet backboard with DPU main controller, supports onboard calibration test terminal for field offline adjustment of signal gain and zero offset.

  • Electrical Power: +5VDC, ±12VDC supplied by control crate backplane power module.

3. Environmental & Anti-interference Spec

  • Operating temperature: 0℃ ~ +55℃ (continuous cabinet running); storage: -40℃ ~ +85℃; humidity:5%~95%RH non-condensing, no corrosive gas surroundings required.

  • Optimized EMI filter circuit & full PCB shielding design, effectively suppress electromagnetic interference from cabinet contactors, inverters and power units, compliant with industrial CE standard.

4. System Matching & Application

  • Directly paired with QSR servo card (3A99101G01/G02), QRF RTD conditioning card(3A99109G01) and QRD temperature acquisition card(3A99114Gxx) to constitute full Q-Line turbine servo control group.

  • Application scenario: Power plant turbine overhaul spare replacement, old WDPF DCS system retrofitting and emergency on-site fault replacement; pin definition fixed, no cabinet wiring modification needed for on-site swapping.

5. Supply & Delivery Term

Original brand-new factory stock out of production globally; stocked items are pre-aged tested refurbished cards with after-sale warranty and inspected second-hand original spare parts. Standard delivery leadtime:2~3 weeks; urgent DHL/UPS/FedEx express available for emergency order; professional board repair service supported, regular repair cycle:2~4 weeks with rush maintenance option.


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