Principle and Application of Leakage Current Sensor
Principle and application of leakage current sensor
Last time we talk about the leakage current of knowledge sharing, so this time let's move to leakage current measurement device, electromagnetic leakage current sensor is a kind of device based on transformer isolation, working principle of the magnetic modulation will be test the micro current, DC micro current into DC current and DC voltage and isolate standard analog signal or digital signal output device.It can be widely used in real-time monitoring of DC and AC power supply system bus and branch insulation condition.
The DC leakage current sensor, which is not common in the market at present, is a measurement module that uses fluxgate principle to convert the DC current under test into a DC current or voltage signal proportional to the current output, with high insulation between the primary and secondary edges.Usually output standard DC 2~20mA, DC0~5V, DC0~10V and other signals. This standard signal can be collected by a variety of acquisition equipment, such as PLC,RTU,DAS card, etc., for a variety of current monitoring occasions.
Principle: According to the leakage current sensor installed in the DC circuit around the positive and negative output line, when the device is operating, real-time detection of the output signal of each branch sensor, when the branch insulation condition is normal, the value of the current flowing through the sensor is equal, opposite direction, its output signal is zero;When the branch is grounded, the leakage current sensor has a differential flow, and the output of the sensor is not zero.Therefore, the grounding branch of DC system can be judged by detecting the output signal of each branch sensor.The principle of high precision line selection is not affected by the line distribution capacitance.
The design features of the DC leakage current sensor are as follows:
1. The DC leakage current sensor adopts fluxgate technology. The compensation current generated by the internal square wave oscillator compensates the original current to achieve magnetic field balance, and then the output reflects the original current, which is mainly used for detection of DC small current and difference current.
2. Integrated design: the DC leakage current sensor adopts the integrated design to replace the method of traditional shunt + transmitter and other components. And it’s small in size and easy to install, so as to avoid problems which caused by too small space structure.
DC leakage current sensor applications in national security using standard, using the standard for all electrical equipment, there is a certain rigid requirements, DC leakage current sensor in the DC system is an indispensable important components, for DC leakage current test equipment, widely used in DC power transmission, electric storage test, DC panel, power supply, large medical equipment, photovoltaic, wind power, communication base station, charging equipment in the industry.It can send the feedback of the leakage situation of equipment and will take relevant measures at the first time after the original electric leakage protection to avoid the accident. In this case, safe use and production operation will be easier.
For more information on the leak current sensor, click on https://www.ivy-metering.com/measuring/ if any inquiry, we will reply you till fixing your worries.
