WOODWARD 8272-781 Three-Phase Real Power Transmitter with Synchronizer Interface (Generator Load Sharing Module)
- Product Code: 8272-781
- Availability: In Stock
WOODWARD 8272-781 Three-Phase Real Power Transmitter with Synchronizer Interface (Generator Load Sharing Module)
Manufacturer Background: Woodward Inc. Turbine & Generator Control division; 8272 series high-precision real power transmitter dedicated for parallel generator load sharing, matched with Woodward 505/505E, 2301A, MicroNet governor systems; widely used in thermal power, gas turbine, offshore oil & gas generator packages, CE certified industrial power control module.
Part Number Breakdown:
- 8272 = 3-phase real power sensor series
- 781 = Standard model with synchronizer phase matching input, without soft-load ramp circuit
Product Type: DIN rail mount three-phase power calculation transmitter; receives PT secondary voltage & CT secondary current signals, calculates true active kW; outputs 4–20mA analog load signal to governor for droop/isoch load sharing, dedicated synchronizer signal port for paralleling phase alignment, analog meter drive output.
Matching Control Equipment: Woodward 505/505E digital governor, 2301A speed controller, SPM synchronizer, MicroNet integrated control system; compatible with plant DCS/PLC for generator power monitoring interlock.
Core Hardware Overview:
1. Signal Input Range: PT secondary 80–150Vac / 160–300Vac 45–60Hz; CT secondary standard 5A full scale; power factor 0.2 lag ~ 0.2 lead supported
2. Power Supply: Dual-range AC input 95–130Vac / 190–260Vac 50/60Hz; typical power consumption 14W, max 20W
3. Analog Outputs: 4–20mA DC proportional to real kW for governor load sharing; 1–5V / 4–20mA optional output for local analog power meter
4. Special Interface: Built-in synchronizer signal terminal block for phase/frequency deviation signal transmission to SPM paralleling unit
5. Protection & Isolation: Full galvanic isolation between PT/CT input and control output; built-in TVS surge suppression, overvoltage protection, reverse connection protection
6. Calibration Adjustment: Front panel potentiometers for zero offset, full-scale kW span, load gain fine-tuning
7. Mechanical & Mounting: Standard 35mm horizontal DIN rail installation, metal industrial housing; wire terminal screw lock design for 0.5–2.5mm² cables
8. Environmental Spec: Operating temp 0℃ ~ +60℃; storage -40℃ ~ +85℃; 5%–95% RH non-condensing; IP20 cabinet protection, IEC60068 vibration resistant for power plant & offshore platforms
9. Safety Compliance: CE LVD, CE EMC, industrial power control standard compliance
1. Product Overview
8272-781 is Woodward standard three-phase real power transmitter designed for parallel generator sets. It acquires three-phase PT voltage and CT current secondary signals to compute accurate active power value, delivering standardized 4–20mA load signal to Woodward speed governors to realize stable load distribution under droop or isochronous control mode.
Unique built-in synchronizer signal circuit distinguishes this model from 8272-796; it provides phase difference feedback signal to Woodward SPM synchronizer to achieve smooth closed bus paralleling operation without extra signal conversion modules. Isolation circuit eliminates ground loop potential difference interference caused by large motors and VFDs, preventing power calculation deviation and incorrect governor load adjustment. Front panel adjustable potentiometers support on-site calibration matched with actual CT/PT transformation ratio, directly driving local analog power indicators without auxiliary converters.
Metal housing and anti-loose screw terminals guarantee stable wiring under high vibration environments such as offshore generator rooms and turbine control cabinets. It is the core power acquisition device for multi-generator parallel grid-connected systems in refineries, combined heat and power plants, and offshore oil & gas facilities.
