Performance Analysis of Touch Voltage Protection System Based on Leakage Current

Abstract

Electrical touch due to leakage current is still one of the causes of occupational safety risks in electric power installations. For this reason, a touch voltage protection system needs to be designed to be able to detect leakage currents quickly and accurately. This research aims to test the performance of touch voltage protection systems both without recloser and with recloser that works automatically. The methods used include designing a protection relay-based system, using a ZMCT103C current sensor as a leakage current detector, and testing the circuit with a variety of resistors and tripping currents between 10-30 mA. The hardware is designed using a combination of incandescent lamp loads and relays, while the software regulates the logic of circuit disconnection and recovery through the recloser. The test results show the average relay disconnection time is in the range of 0.27-0.32 seconds in the system without recloser and 0.24-0.36 seconds in the system with recloser. The current sensor has an average error value of 2% with a standard deviation of 1.6 mA readings. The protection success rate reached 100% in the low resistance leakage current test. In conclusion, the tested touch voltage protection system has a fast, accurate response, and is able to provide effective protection against the risk of electric shock.