New Calibration Service for Earth Fault Loop Impedance Testers

The Standards and Calibration Laboratory has recently launched a new calibration service for Earth Fault Loop Impedance Testers for low voltage systems. This service enables calibration of loop impedance values ranging from 0.35 Ω to 1.7 kΩ, with expanded measurement uncertainties down to 42 mΩ. This calibration service ensures these testers deliver accurate readings, which is critical for verifying compliance with safety standards and regulations. Properly calibrated testers help prevent electrical faults, enhancing both the safety and functionality of electrical systems.

Setup for the calibration of Earth Loop Impedance Tester

Why Earth Fault Loop Impedance Matters

Earth fault loop impedance testing, also known as Earth loop or loop impedance testing, is a critical process in ensuring electrical safety. It assesses the resistance within the earth fault loop, comprising live conductors and the earth, to verify that protective devices like circuit breakers or fuses function efficiently during faults. Conducting these tests minimizes risks of electric shocks and fire hazards, thus protecting both lives and property. Additional information about this testing is outlined in international standards, such as IEC 61557.