GB/T 37144-2018 in English
VALIDCabinets for low-voltage switchgear—Electrical mechanical structures
- Issued on:2019-07-01
- Implemented on:2018-12-28
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
《GB/T 37144-2018低压机柜 电气机械结构》由TC34（全国电工电子设备结构综合标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
GB/T 37144—2018 Standard Overview
GB/T 37144—2018 "Electrical Mechanical Structure of Low Voltage Cabinets" mainly specifies the environmental adaptability, surface, insulation performance, electrical performance, mechanical performance, enclosure protection level, information and inspection rules for products used for electrical connection or mechanical support in low voltage cabinets. It is applicable to active connection connectors, insulating parts, functional distribution parts, etc. for electrical circuits with rated voltage AC $1000\mathrm{~V}$ or less.
Comparison of standard frameworks
| Standard dimensions | Requirements | Test methods | Qualification determination |
|---|---|---|---|
| Environmental adaptability | Temperature range: $-5^\circ\mathrm{C}$ to $+40^\circ\mathrm{C}$, altitude not exceeding $2000\mathrm{~m}$, relative humidity control, etc. | High temperature, low temperature, constant humidity test (such as GB/T2423.2, GB/T2423.1, GB/T2423.3) | Surface condition meets the requirements, insulation resistance is qualified, and withstand voltage capability passes. |
| Insulation performance | Indicators such as electrical clearance, creepage distance, insulation resistance, leakage current, etc. | Measurement method, test method (such as GB/T16935.1) | All test parameters meet the specified values of the standard. |
| Mechanical performance | Impact, collision, free fall, vibration, mechanical life, etc. | Test methods such as GB/T2423.5, GB/T2423.6, GB/T2423.8, etc. | No obvious damage on the surface, and the insulation performance remains normal. |
Explanation of professional terms and practical applications
Insulation resistance: Refers to the ability of insulating materials to block current under specified conditions. For example, the insulation resistance value of basic insulation is not less than $2\mathrm{M}\Omega$, which can be measured by a megohmmeter.
Creep distance: An important indicator used to measure insulation performance, especially in highly polluted environments. Table 2 shows the minimum creepage distance requirements under different rated voltages.
Implementation recommendations
- Manufacturer: Ensure that the raw materials and production processes meet the standard requirements, especially the selection of insulating materials and surface treatment processes.
- Testing agency: Strictly carry out inspections in accordance with the test methods specified in the standard to ensure that all test items are qualified.
- User: Follow the instructions in the product manual during installation and use, especially when using in special environments such as high temperature and high humidity.
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