GB/T 14048.20-2013

This standard specifies technical requirements, test methods, and performance criteria for three-position enabling switches used in low-voltage control circuits. It is applied in industrial machinery and automation systems where operators must manually enable or disable machine functions through a switch with three distinct positions (off, on, and a third enabling state) to ensure safe operation. The standard is critical for safety-related control applications, such as in robotics, manufacturing equipment, and other machinery requiring operator intervention to prevent unintended movement or hazards.