What is a Power Transducer?

Power transducers are instruments that can convert measured active power and reactive power into DC output. The DC current or voltage is linearly proportional to the input power and reflects the transmission direction of the measured power in the line. They are suitable for various single and three-phase (balanced or unbalanced) circuits, and can be widely used in power plants, power transmission and transformation systems, and other places where power measurement is required. Power sensors are also called power meter probes, which convert high-frequency signals into detectable electrical signals through energy conversion.

Working principle of power transducer

Power transducer uses a dedicated power conversion circuit to transform AC power signals into standard DC current and voltage signals that are linearly related to them. Then, the signals are output as constant current or voltage analog signals through active filtering and linear amplification. The transmitter has characteristics such as high accuracy and stable operation, and its output is a constant current or voltage signal. At the same time, the power signal can also be output as a pulse. Just count the pulses to obtain the electricity value. Therefore, the application of power sensors also has features such as convenience and high cost-effectiveness, and the sensor is used to measure the measurement and conversion of active power or reactive power of various characteristic loads such as single-phase and three-phase.

Product features of power transducer

• MCU technology and accurate algorithms are used to achieve accurate measurement of AC circuit power and accurately reflect the direction of power transmission.

• Good anti-interference ability and high accuracy.

• Good linearity and high accuracy.

• Automatic zero adjustment and excellent temperature characteristics guarantee the long-term stability of the instrument and make the power sensor free from periodic verification.

• All parameters are digitally calibrated. Conventional potentiometer analog adjustment is eliminated, simplifying the hardware circuit, and improving the reliability and stability of the entire machine.

• Perfect electromagnetic compatibility design, with strong anti-electromagnetic interference ability.

• SMT components are fully used to make the product small in size, low in power consumption, and light in weight.

• The digital output of the power transducer is isolated from the power supply and output. 

For power transmitters that use fiber optic transmission, the fiber not only plays a transmission role but also plays an isolation role. It can completely avoid losses and interference in the transmission link and is suitable for high-precision measurements in complex electromagnetic environments. The digital output transmitter of the power transducer is convenient for networked and intelligent applications. The digital output power sensor can form a virtual instrument together with transmission systems, host computers, etc. The function and display mode of the virtual instrument are determined by the software and can realize numerical display, instrument display, real-time waveform display, trend curve display, bar graph, pie chart, vector map, and other display modes for multiple parameters.