8272-831 - Woodward Power Sensor Module (24 VDC / 115 VAC)

TECHNICAL SPECIFICATIONS:

Part Number: 8272-831
Manufacturer: Woodward
Module Type: Real Power Sensor
Input Voltage (PT): 115 VAC (Potential Transformer Input)
Input Current (CT): 0–5 A (Current Transformer Input)
Output Signal: 0–5 VDC or 4–20 mA (Configurable)
Accuracy: ±0.5% of full scale
Frequency Range: 45–66 Hz
Isolation: 1500 VAC (Input to Output)
Operating Temp: -20 °C to +70 °C
Availability: In Stock
Origin: United States

FUNCTIONAL DESCRIPTION:

The 8272-831 is a Power Sensor Module designed by Woodward for high-accuracy load monitoring in power generation and distribution systems. This device measures the true power (kW) produced by a generator by analyzing the phase relationship between voltage and current. It serves as a vital feedback component for load-sharing and speed control systems, ensuring that generators operate within their designed capacity and maintain balanced load distribution across a multi-unit grid.

PRECISION POWER MEASUREMENT

The Real Power Sensor Module processes inputs from both Potential Transformers (PTs) and Current Transformers (CTs). By calculating the product of the instantaneous voltage, current, and power factor ($P = V cdot I cdot cosphi$), the sensor provides a highly accurate analog representation of the actual work being performed. This measurement is immune to harmonic distortion, providing stable feedback even in systems with non-linear loads or fluctuating electrical conditions.

SYSTEM INTEGRATION AND ISOLATION

Designed for seamless integration with Woodward 2301A, 723plus, and MicroNet control systems, the Power Sensor Module converts complex AC parameters into a clean, linear DC output. To ensure the safety of the control logic, the sensor features 1500 VAC of isolation between the high-voltage sensing inputs and the low-voltage control output. This robust isolation prevents electrical transients on the main bus from damaging sensitive electronic governors or PLC modules.

RELIABILITY IN HARSH ENVIRONMENTS

The Power Sensor Module is housed in a rugged enclosure capable of withstanding the vibration and thermal cycling common in engine rooms and power plants. Its wide operating temperature range and solid-state design ensure long-term stability without the need for frequent recalibration. This reliability is essential for mission-critical applications where accurate load sensing is required for automated start/stop sequencing and emergency load shedding.

WHY BUY FROM WOC:

World of Controls supports your power generation infrastructure by offering the 8272-831 in both UNUSED and REBUILT conditions. Each power sensor is rigorously tested on specialized electrical simulation benches to verify measurement accuracy and isolation integrity. Backed by our extensive inventory and 24/7 technical support, WOC is your trusted source for high-quality Woodward power sensing hardware.

FREQUENTLY ASKED QUESTIONS:

What is the Woodward 8272-831?

The 8272-831 is a Real Power Sensor that measures the kW output of a generator and provides a proportional DC signal to a control system.

How does this sensor calculate Real Power?

It monitors the voltage and current waveforms simultaneously, accounting for the phase angle (power factor) to ensure it measures actual kilowatts (kW) rather than just apparent power (kVA).

Can this sensor be used with different CT ratios?

Yes, the 8272-831 is designed to work with standard 5A output current transformers; the system scaling is typically handled within the governor or control software settings.

What happens if there is a voltage spike on the bus?

The Power Sensor Module is equipped with high-level galvanic isolation (1500 VAC) to protect the connected control system from voltage transients and spikes originating from the power bus.