This standard specifies the general tolerances for assembly structures. This standard applies to the assembly structures of electrical equipment and the processing of the equipment components of each assembly structure. JB/T 6753.5-1993 Electrical equipment equipment component tolerances assembly structure general tolerances JB/T6753.5-1993 Standard download decompression password: www.bzxz.net

Subject content and scope of application
Machinery Industry Standard of the People's Republic of China
Equipment structure tolerances of electrical equipment
General tolerances of assembled structures
This standard specifies the general tolerances of assembled structuresJB/T 6753.593
This standard applies to the assembled structures of electrical equipment and the processing of the equipment structures of each assembled structure unit2 Reference standards
JB/T6753.1 Equipment structure tolerances of electrical equipmentGeneral tolerances of sheet metal parts and structures and their selection rulesJB/T6753.4
3 Terminology
Equipment structure tolerances of electrical equipment
General tolerances of welded structures
Citing the provisions of Chapter 3 of JB/T6753.4. General tolerances
4.1 The general tolerances of height, width and depth are both A and B, and their limit deviation values ​​are shown in Table 1. Table 1
Size segment
>120~400
>400~1000
>1000~2000
>2000~4000
The verticality tolerance of the assembled structure adopts the A or B grade of the general verticality tolerance in Table 2, Chapter 4 of JB/T6753.1. 4.2bzxZ.net
4.3The same or parallel gaps (referring to parallel gaps with the same gap size) formed between the surface structural elements of the assembled structure (such as doors and doors; doors and other structural elements, etc.) should be uniform. The gap difference shall not exceed the value specified in Table 2. Approved by the Ministry of Machinery Industry on August 21, 1993
Implementation on October 1, 1993
≤1000
The basic size is the shorter side size of the formed gap. JB/T6753.593
4.4 The general tolerance of the flatness of panel components such as panels, side panels, door panels, etc. is 3mm per square meter. The marking
shall comply with the provisions of Chapter 9 of JB/T6753.1.
Additional remarks:
This standard is proposed and managed by the Beijing Institute of Electrical Engineering Comprehensive Technology and Economics.
This standard was drafted by Tianjin Electric Transmission Design Institute, Xuchang Relay Institute, Shenyang Low Voltage Switch Factory, and Shanghai Huatong Switch Factory. Shanghai Electric Complete Plant, Kunming Switch Factory, Beijing Second Switch Factory, and Guangzhou Nanyang Electric Factory participated in the drafting. The main drafters of this standard are Guo Xiaohu, Wang Aimian, Yin Guijun, Zhong Xiaobo, and Wang Minsheng. 12
People's Republic of China
Mechanical Industry Standard
Equipment Structure Tolerance of Electrical Equipment
JB/T6753.1~6753.5
Mechanical Standardization Research Institute of the Ministry of Machinery Industry
Edited, published and distributed by the Standardization Research Office of the First Equipment Department of the Ministry of Machinery Industry
(No. 302, Xiashesi Street, Xiangtan City, Hunan Province)
Printed by the Printing Plant of Xiang Electric Machinery Factory
Format 880×12301/16
First edition in April 1994
Printing number
Printing sheet 1 Number of words 30000
First printing in April 1994
1-1000
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