GB/T 37405-2019 in English

GB/T 37405—2019 Standard Interpretation

GB/T 37405—2019 "High-voltage thyristor phase-controlled voltage-regulating soft-starting device" is a technical standard for soft-starting devices designed for three-phase AC motors with rated voltages ranging from 3 kV to 10 kV. This standard was proposed by the China Electrical Equipment Industry Association and is managed by the National Technical Committee for Standardization of Power Electronics Systems and Equipment. It aims to standardize the model naming, technical requirements, test methods and inspection rules of high-voltage thyristor phase-controlled voltage-regulating soft-starting devices.

Background of Standard Formulation

With the development of industrial automation and intelligence, high-voltage motors are increasingly used in metallurgy, petrochemicals, building materials and other industries. The traditional rigid starting method is prone to grid shock and equipment damage, and the introduction of soft starting technology effectively solves these problems. The formulation of the GB/T 37405-2019 standard fills the gap in the domestic field of high-voltage thyristor phase-controlled voltage-regulating soft-start devices, and provides a unified technical basis for product design, production and application.

Technical Framework Comparison

Technology evolution and application cases

Implementation recommendations

• Selection recommendations:Select a soft starter with a suitable voltage level according to the rated parameters of the motor, and ensure that the wiring method meets the requirements of Appendix A.
• Installation and commissioning:Strictly perform grounding treatment (refer to Table 1) and electrical clearance inspection in accordance with standard requirements to avoid safety hazards caused by improper installation.
• Maintenance and inspection:Perform insulation resistance tests and dielectric strength tests regularly to ensure long-term and stable operation of the equipment.