Description

IEC 60947-3 is the international standard for low-voltage switches, disconnectors, switch-disconnectors, and fuse-combination units used in distribution and motor circuits. It covers equipment rated up to 1,000 V AC or 1,500 V DC, ensuring safety and performance. The 2020/2021 edition (currently amended by A1:2025) covers DC switch tests, motor switching, and aluminium conductor connections.

An isolator switch is a manually operated mechanical device designed to physically disconnect a circuit from its power source. Its primary purpose is to ensure complete de-energization so equipment can be safely serviced, repaired, or inspected