Voltage Transducer Introduction: Types, Function, Features

A voltage transducer is a device that converts measured electrical parameters into isolated analog or digital signals, either AC or DC voltage. It is used to measure voltage or current signals with significant waveform distortion in power grids, and can also measure non-sinusoidal waveforms such as square waves and triangular waves. Many distributors like Heisener , offer a wide range of components of voltage transducers to cater to diverse application needs.

Voltage Transducer Types

According to the input signal

There are three types classified according to the input signal, including DC voltage transducers, AC voltage transducers and AC-DC voltage transducers.

1. DC Voltage Transducers

DC voltage transducers operate by sensing the DC voltage input and using internal circuitry to produce an output signal proportional to the input voltage. Typically, these devices provide outputs such as 0-10V or 4-20mA. The key components include a sensing element, signal conditioning circuits, and an output stage. They are widely used in applications such as in power supply systems, battery management, and industrial process control.

2. AC Voltage Transducers

AC voltage transducers measure AC voltage and convert it into a standardized output signal. They work by detecting the RMS (root mean square) value of the AC voltage signal and processing it through internal electronics to generate an output proportional to this value. Common outputs include 0-10V or 4-20mA.

3. AC-DC Voltage Transducers

AC-DC voltage transducers can measure both AC and DC voltage signals. The transducer processes the input voltage through its internal circuits and provides an output signal that represents either the AC or DC voltage. This type of transducer is especially useful in systems where both AC and DC signals need to be monitored and controlled simultaneously.

According to the output signal

There are two types classified according to the output signal, including analog output voltage transducers and digital output voltage transducers.

1. Output Voltage Transducers

Analog output voltage transducers convert the measured voltage signal into a continuous analog output signal, such as 0-10V or 4-20mA. They work by translating the input voltage directly into an analog signal that varies continuously with the input voltage. These devices are commonly used in applications requiring direct analog signal transmission for integration with other analog equipment.

2. Digital Output Voltage Transducers

Digital output voltage transducers convert the measured voltage into a digital signal, which can be transmitted via communication protocols such as RS485 or Modbus. These devices use digital processing to convert the analog input signal into a digital format, providing precise and noise-resistant data transmission. These transducers are beneficial in environments requiring robust data handling and remote monitoring.

The Function of Voltage Transducer

The function of a voltage transducer is to convert voltage measurements into standardized output signals, such as analog (0-10V, 4-20mA) or digital signals. This enables compatibility with various monitoring systems, control devices, and data acquisition systems, facilitating accurate voltage measurement and reliable performance monitoring.

Voltage transducers are widely used in power distribution systems, industrial automation equipment, generator sets, substations, and smart building management systems. They provide critical data to maintain system stability, enhance operational efficiency, and support real-time monitoring and data analysis.

Voltage Transducer Key Features

1. Converts the measured DC voltage into a single-channel standard DC voltage or current output with linear proportionality while providing isolation.
2. Features low power consumption, triple isolation, and high reliability.
3. Offers excellent interference resistance and high accuracy.
4. Equipped with voltage plug-in terminals and supports standard rail mounting.
5. Widely used in various industrial voltage online isolation detection systems.
6. Compact in size.
7. Operates with a supply voltage range of 11V to 30V.

FAQs

What are the main applications of voltage transducers?

Voltage transducers are used in power distribution systems, industrial automation, generator monitoring, substations, and smart building management systems.

What parameters should be considered when selecting a voltage transducer?

Key parameters include input voltage range, output signal type, accuracy, isolation level, power supply requirements, and environmental conditions.

How do I install a voltage transducer?

Install the voltage transducer according to the manufacturer's instructions, typically involving connecting the input terminals to the voltage source and the output terminals to the monitoring or control system.