GB/T 4 2125.6 - 2025 is part 6 of the safety requirements for electrical equipment for measurement, control and laboratory use, special project for equipment containing test or measurement circuits. The standard specifies the special safety requirements for this type of equipment, including circuit protection, insulation performance, electromagnetic compatibility and other key content. It is suitable for related equipment in laboratories, industrial testing and other scenarios. It can unify safety standards, avoid the risk of electric shock or equipment damage, and provide a safety technical basis for equipment design, production and use.