HV-C54 series voltage sensor is a measurement module that uses the Hall closed-loop (magnetic balance) principle to convert the measured voltage into a current or voltage output that is proportional to the primary voltage. It has the characteristics of high accuracy, high linearity, high integration, small size, simple structure, long-term stability, and adaptability to various working environments. It is widely used in the system control and detection of electrical equipment in industries such as power, petroleum, coal mining, chemical, railway, communication, and building automation.