IEC/EN 60947‑4‑1 is an international standard for low-voltage switchgear and controlgear—specifically contactors, motor starters, and overload relays for AC and DC motors. ABB equipment designed according to this standard ensures safety, reliability, and interoperability in motor control and protection applications. The standard defines performance, electrical, mechanical, and environmental requirements for devices controlling motors, including manual and automatic starters, contactors, thermal overload relays, and associated control units.
