A Rogowski coil is an electrical device used to measure alternating current (AC) with high accuracy, excellent linearity, and a wide dynamic range. It belongs to the family of non-intrusive current sensors and is commonly used in power monitoring, protection systems, and industrial automation. Unlike conventional current transformers (CTs), a Rogowski coil does not contain magnetic cores. Instead, it is made of a uniformly wound helical coil placed around the conductor being measured. The absence of a magnetic core gives it several advantages, including immunity to core saturation, lightweight structure, and excellent performance in measuring rapidly changing currents.
Leakage current sensors operate by measuring the differential current in a circuit. In a balanced, properly insulated system, the sum of currents in the live and neutral conductors should be zero. When a leakage occurs, part of the current diverts to the ground or another unintended path, creating an imbalance. Leakage current sensors detect this imbalance and convert it into a measurable signal.
Current transducers are essential components in modern power monitoring, automation, renewable energy systems and industrial equipment. They convert electrical current into measurable signals that can be used for control, protection and data acquisition. As global demand for energy efficiency and intelligent power management increases, the market for current transducer manufacturers has expanded rapidly. Many suppliers now offer a wide selection of AC, DC and mixed current measurement devices with different levels of accuracy, response time and installation flexibility.
A voltage transducer is an electronic device designed to accurately convert an electrical voltage signal from an input circuit into a proportional output signal, typically in the form of a standard current (such as 4–20 mA) or voltage (such as 0–10 V). This output can then be used for monitoring, control, protection, and data acquisition in various electrical systems.
