CRGO silicon steel core current transformer

A current sensor is a device used to measure the current value in a circuit and is widely used in power systems, electronic equipment, machinery manufacturing and other fields. Its working principle is to convert the current in the sensing circuit into an electrical signal output proportional to the current. Common current sensors in HEMEI Electronics have a variety of sensing methods, such as these.   1. Magnetoelectric induction Magnetoelectric induction current sensor is a device that uses the principle of magnetic field induction to measure current. It converts the current in the circuit into voltage or electrical signal output through magnetic field induction inside the sensor. Magnetoelectric induction current sensor has the characteristics of fast response speed, high precision and good linearity, and is widely used in power systems and electronic equipment.   2. Electric field induction Electric field induction current sensor is a device that uses the principle of electric field induction to measure current. It converts the current in the circuit into voltage or electrical signal output through electric field induction inside the sensor. Electric field induction current sensor has the characteristics of wide measurement range, fast response speed and high precision, and is widely used in power systems and electronic equipment.   3. Resistive induction Resistive induction current sensor is a device that uses the principle of resistive induction to measure current. It converts the current in the circuit into voltage or electrical signal output through the resistance induction inside the sensor. The resistance induction current sensor has the characteristics of simple structure and low price, and is suitable for some occasions with low precision requirements.   4. Ultrasonic induction type The ultrasonic induction current sensor is a device that uses the ultrasonic induction principle to realize current measurement. It converts the current in the circuit into voltage or electrical signal output through ultrasonic induction inside the sensor. The ultrasonic induction current sensor has the characteristics of non-contact, high precision, and wide measurement range, and is suitable for current measurement in some special occasions. In general, the current sensor is a very important electrical measurement device with a variety of induction methods, each of which has its characteristics and scope of application. When selecting a current sensor, it is necessary to select a suitable induction method according to actual needs and usage occasions.

1. Classification by purpose Measurement current transformer (or measurement winding of current transformer. Provides current information of the power grid to measurement and metering devices within the normal working current range. Protection current transformer (or protection winding of current transformer. Provides power grid fault current information to relay protection and other devices under power grid fault conditions.   2. Classification by insulation medium Dry-type current transformer: Insulation is made of ordinary insulating materials treated with varnish. Cast current transformer: Current transformer cast with epoxy resin or other resin mixed materials. Oil-immersed current transformer: Insulation is made of insulating paper and insulating oil. Insulation, generally outdoor type. At present, it is commonly used in various voltage levels in my country. Gas insulated current transformer: the main insulation is composed of gas.   3. According to the principle of current conversion Electromagnetic current transformer: a current transformer that realizes current conversion based on the principle of electromagnetic induction. Photoelectric current transformer: a current transformer that realizes current conversion through the principle of photoelectric conversion, which is still under development.   4. According to the installation method Through-type current transformer: a current transformer used to pass through a screen or wall. Pillar current transformer: a current transformer installed on a plane or pillar, and also used as a conductor pillar for a primary circuit.