GB/T 7268-2015 in English
VALIDSeries of basic dimensions of subracks and associated plug-in units panels for protection and automation equipment of power system
- Issued on:2015-05-15
- Implemented on:2015-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 7268-2015 |
| Document status: | VALID |
| Title in English: | Series of basic dimensions of subracks and associated plug-in units panels for protection and automation equipment of power system |
| Title in Chinese: | 电力系统保护及其自动化装置用插箱及插件面板基本尺寸系列 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2015-05-15 |
| Implemented on: | 2015-12-01 |
| Superseding: |
GB/T 7268-2005 Series of basic dimensions of subracks and aassociated panels of plug-in for control and protection equipment of secondary circuit of power system
|
| ICS Classification: | 31.240-Mechanical structures for electronic equipment |
| Chinese Classification: | K05-Electrical product mechanical structure |
| Professional Classification: | GB-National Standard |
| Related Keywords: | plug-in units panels
plug-in panels gb/t plug-in panels plug-in box size series power system protection |
| Related Topics: | plug-in
GBT7268 GB/T 7268-1987 GB/T 7268-2005 GB/T 7268-2015 plug-in box Large-size online automatic detection method and device |
《GB/T 7268-2015电力系统保护及其自动化装置用插箱及插件面板基本尺寸系列》由TC154（全国量度继电器和保护设备标准化技术委员会）归口，主管部门为中国电器工业协会。
本标准规定了电力系统保护及其自动化装置用插箱及插件面板的基本尺寸系列。
本标准适用于电力系统继电保护、安全自动装置及其接口设备。包括20mm 进制及19in两种规格。
Introduction
Interpretation of the National Standard of the People's Republic of China GB/T 7268-2015
1. Background of Standard Formulation and Analysis of Technical Evolution
GB/T 7268-2015 is a standard for the basic size series of plug-in boxes and plug-in panels for power system protection and automation devices. This standard replaces the old version of GB/T 7268-2005, and mainly updates and improves the following aspects:
- The name of the standard is adjusted to the more accurate "Basic size series of plug-in boxes and plug-in panels for power system protection and automation devices".
- Added notch details to ensure consistency in manufacturing and installation.
- Optimized the range involved in the table, for example, \(0 \sim 6\) in Table 3 is adjusted to \(0 \sim 10\).
- The overall panel and back panel widths have been redefined to \(b < n_{2} \times 5.08\).
2. Comparison of standard frameworks
| Standard content | GB/T 7268-2005 | GB/T 7268-2015 |
|---|---|---|
| Plug-in box size series | Not clear slot details | Add slot details to ensure installation consistency. |
| Plug-in panel basic size series | Limited formula range | The scope of application of the formula has been expanded to improve flexibility. |
| Overall panel and back panel size series | Unspecified width and height requirements | Specified width is \(b < n_{2} \times 5.08\), height is \(h_{c} - \ rac{9}{0.3}\). |
3. Detailed explanation of standard content
Basic size series of plug-in boxes and plug-in panels
GB/T 7268-2015 specifies two specifications: height is \(20 \mathrm{~mm}\) and \(19 \mathrm{in}\), which is applicable to power system relay protection, safety automatic devices and their interface equipment.
Dimensional tolerance and fit
The dimensional tolerances of the plug-in box and plug-in panel shall be implemented in accordance with the provisions of IT9~IT10 and IT9 in GB/T 1800.1-2009. The geometric tolerances shall be standardized according to the different levels in GB/T 1184-1996 to ensure manufacturing accuracy and installation stability.
4. Implementation suggestions
Practical application case analysis
Taking a power system automation device as an example, when selecting a plug-in box and plug-in panel, the protection and automation requirements of the equipment should be determined first, and the appropriate size series should be selected according to the provisions of GB/T 7268-2015. For example:
- For a plug-in box with a height of \(4 U\), its height \(H = 177.00 \mathrm{~mm}\) and width \(B = 482.6 \mathrm{~mm}\).
- The width of the plug-in panel can be calculated by the formula \(b = 5.08 \times n_{2} - 0.2\) to ensure that it matches the size of the plug-in box.
Notes
In actual applications, manufacturing and installation should be carried out in strict accordance with the tolerances and form and position tolerances specified in the standard to avoid equipment operation problems caused by dimensional deviations. For special needs, it is recommended to communicate with the manufacturer in advance to ensure that the customized solution meets the specifications.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 19520.17-2010 in English
Mechanical structures for electronic equipment - Dimension of mechanical structures of the 482.6 mm（19 in）series - Part 3-105: Dimensions and design aspects for 1U high chassis
2010-11-10 -
GB/T 18663.6-2026 in English
Mechanical structures for electrical and electronic equipment—Tests for metric and inch system—Part 6: Security aspects for indoor cabinets
2026-02-27 -
GB/T 37135-2018 in English
Safety requirements for insulated chassis
2018-12-28 -
GB/T 25293-2010 in English
Mechanical door lock for cabinets of electrotechnical and electronic equipment
2010-11-10 -
GB/T 7267-2015 in English
Series of basic dimension of protective and control panels and cabinet for secondary circuit of power system
2015-05-15 -
GB/T 22690-2008 in English
General mechanical structures for data communication equipment - Cabinet and subrack
2008-12-31 -
GB/T 45655-2025 in English
General modular electrical cabinets with narrow-sized dimensions
2025-04-25
