GB/T 37144-2018Cabinets for low-voltage switchgear—Electrical mechanical structures (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the environmental adaptability, surface, insulation properties and electrical properties of electrical connections or mechanical support products in low-voltage cabinets. Energy, mechanical properties, enclosure protection rating, information and inspection rules.

This standard applies to the installation and supply to the user by the cabinet manufacturer, and the rated voltage is less than 1000V, the frequency is 50Hz (or 60Hz), or DC below 1500V, including but not limited to.

---Connectors for active connections in electrical circuits, including primary circuit connectors, secondary circuit connectors, or for plug connections Use device, etc.;

---Insulation for electrical support, including busbar clamps, insulators, etc.;

---Functions for electrical circuit distribution, including one circuit assigned to two circuits, three circuits or four circuits and above Energy

--- Functional components mounted on the metal structure of the low-voltage cabinet, and made of insulating materials, including operating handles, ventilation windows, labels Box and so on.

Note: Refer to Appendix A for the type test items of different electrical and mechanical structure products.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 2423.1-2008 Environmental testing of electric and electronic products - Part 2: Test methods Test A. Low temperature

GB/T 2423.2-2008 Environmental testing of electrical and electronic products - Part 2: Test methods Test B. High temperature

GB/T 2423.3-2016 Environmental testing - Part 2: Test method test Cab. constant damp heat test

GB/T 2423.5-1995 Environmental testing for electric and electronic products - Part 2: Test methods Test Ea and guide. Impact

GB/T 2423.6-1995 Environmental testing for electric and electronic products - Part 2: Test methods Test Eb and guide. Collision

GB/T 2423.8-1995 Environmental testing of electric and electronic products - Part 2: Test method test Ed. Free fall

GB/T 2423.10-2008 Environmental testing of electric and electronic products - Part 2: Test method test Fc. Vibration (sinusoidal)

GB/T 2423.17-2008 Environmental testing of electric and electronic products - Part 2: Test method test Ka. salt spray

GB/T 2828.1-2012 Sampling procedures for counting sampling - Part 1. Quantitative inspection by batches plan

GB/T 4207-2012 Determination of resistance to tracking marks and comparison of electrical tracking index of solid insulating materials

GB/T 4208-2017 enclosure protection grade (IP code)

GB/T 5169.10-2017 Electrical and electronic products - Fire hazard testing - Part 10: Glowing wire/hot wire basic test method burning Hot wire device and general test method

GB/T 5169.11-2017 Electrical and electronic products - Fire hazard testing - Part 11: Glowing wire/hot wire basic test method Glowing wire flammability test method (QWEPT)

GB/T 5465.2-2008 Graphical symbols for electrical equipment - Part 2: Graphical symbols

GB/T 11021-2014 Electrical insulation heat resistance and representation