This standard specifies the relevant dimensional requirements for the correct design of electrical installation rails and the electrical appliances fixed on the installation rails. JB/T 6525-1992 Electrical Installation Rails JB/T6525-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Electrical Installation Rail
JB6525-92
This standard is equivalent to the International Electrotechnical Commission IEC Standard 715 (1981 Edition) "Dimensions of low-voltage switchgear and controlgear - Standard mounting rails for mechanical support of electrical appliances in complete switchgear and controlgear". 1 Subject content and scope of application
This standard specifies the relevant dimensional requirements for the correct design of electrical installation rails (hereinafter referred to as installation rails or rails) and the electrical appliances fixed on the installation rails.
This standard applies to three types of mounting rails with cross-sections used to fix different electrical components in low-voltage switchgear and control equipment with the help of accessories or elastic structural parts:
"TH" hat-type mounting rail;
"G\-type mounting rail;
"C"-type mounting rail.
This standard also applies to the relevant parts of electrical appliances fixed on the above three types of mounting rails. Note: ① In order to meet the needs of various fixing methods for electrical installation, mounting rails with mixed cross-sections (such as a combination of two standard cross-section sizes of TH and C) can be used.
② When designing the enclosure of electrical equipment When the mounting rail is installed, a mounting rail with a standard cross-section size can be used as a component of the housing. 2 Reference standards
GB1182
3 Terms
Shape and position tolerance codes and their annotations
Electrical mounting railsMounting rails for electrical apparatusTo facilitate the rapid installation and removal of electrical components and any combination, the rails of the electrical apparatus are fixed by means of accessories (such as sliding nuts, hook-shaped or T-shaped bolts, etc.) or by directly buckling elastic structural parts or other methods. 4 Functional requirements
The basic function of the mounting rail is to support electrical equipment, so it should have Sufficient mechanical strength and rigidity to ensure that it can withstand the static and dynamic loads of electrical equipment.
Because the fixing method of the mounting rail may affect the performance of the electrical appliance, the assembler should pay attention to the reasonable selection of the structural type and material of the mounting rail to ensure the correct operation of the electrical appliance.
Appendix C provides a method for estimating the actual load torque of the mounting rail and its allowable load characteristics for reference when selecting. 5 Dimension requirements
Figures 1 to 7 show the relevant dimensional requirements for correctly designed mounting rails and electrical appliances fixed on the mounting rails. They are applicable to steel rails, aluminum rails or rails made of other materials. The unit of size is millimeter. The maximum effective space in Figures 1 and 2 is shown as follows: In the figure, the hatched area represents the maximum effective space of the TH-type mounting rail, the rail's supporting structure and its fixing device. In the maximum effective space schematic diagrams of Figures 3 and 4 to 7, the hatched area represents the maximum effective space of the G-type mounting rail and the C-type mounting rail and their supporting structures, but does not include the rail's fixing device. The remaining parts in the above figures all represent the maximum effective space of the electrical appliances fixed on the mounting rail. JB6525-92
In the enlarged views of the mounting rail edges in Figures 1 to 7, the manufacturing tolerances are included , within the given tolerances, TH-type mounting rails and C-type mounting rails are symmetrical. The angle tolerances shown are one-sided and have values ​​between zero and the values ​​shown. They include design tolerances. 5.1TH-type mounting rail
Reference plane
(a) Schematic diagram of maximum effective space
Reference plane
(b) Enlarged view of edge
Figure 1TH35-type (35mm wide) mounting rail
Reference plane
(a) Schematic diagram of maximum effective space
Reference plane
(b) Enlarged view of edge
Figure 2TH75-type (75mm wide) mounting rail||tt ||G-type mounting rail
5.3C-type mounting railWww.bzxZ.net
Reference surface
(a) Schematic diagram of maximum effective space
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1.5±0.05
Reference surface
1.5±0.05
(b) Magnified edge image
G32-type (32mm width) mounting rail
Reference surface
0.6×45°
(a) Schematic diagram of maximum effective space
Reference surface
3°max
(b) Magnified edge image
Figure 4C2 0-type (20mm wide) mounting rail
reference surface
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(a) Schematic diagram of the maximum effective space
reference surface
3°max
(b) Enlarged view of the edge
Figure 5C30-type (30mm wide) mounting rail
reference surface
(a) Schematic diagram of the maximum effective space
reference surface
(b) Enlarged view of the edge
Figure 6C40-type (40mm wide) mounting rail
reference surface
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(a) The maximum Schematic diagram of large effective space
Reference surface
(b) Enlarged view of edge
Figure 7C50 type (50mm width) mounting rail
A1 Material properties
JB6525-92
Appendix A
Steel mounting rail
(Supplement)
Carbon structural steel cold-rolled steel plate is used as material, and after surface bright annealing, it is slightly flattened. The tensile strength is required to be 320 to 420N/mm; the elongation is at least 30%; 180° bending test is carried out along the rolling direction and perpendicular to the rolling direction, and there shall be no cracks, cracks and delamination at the bending.
Only when the manufacturer and the user reach an agreement, can other steel plates be used as materials. A2 Dimensions and specifications
This appendix lists the dimensions and tolerance requirements of several standard steel mounting rails. Manufacturers may mark the tolerances on the mounting rail drawings according to the relevant standards, but the tolerance values ​​shall be within the tolerance range specified in this appendix. Other tolerance values ​​are allowed only after the manufacturer and the user have agreed.
Note: If the mounting rail has a cladding layer, the cladding dimensions shall comply with the tolerance provisions of this appendix, and the performance of the cladding layer shall comply with the provisions of the relevant standards. The "smooth edge" noted in the dimension drawing refers to the absence of burrs and sharp edges to ensure proper fit in actual use. A2.1TH steel mounting rail
A2.1.1TH35 steel mounting rail
There are two specifications:
TH357.5 steel mounting rail (width 35mm, height 7.5mm) can be used to fix various small electrical appliances, wiring sockets and sockets. TH35-15 steel mounting rail (width 35.mm, height 15mm) has good rigidity and can fix heavier electrical appliances. A2.1.1.1 Dimensions
The cross-sectional dimensions shown in Figure A1 apply to the entire length of the mounting rail, but no inspection is performed within 10mm from both ends of the rail. I
Cross-sectional dimension drawing of TH35 steel mounting rail
A2.1.1.2 Geometric tolerances
JB6525-92
(a) Schematic diagram of cross-sectional dimensions of TH35 steel mounting rail (b) Partial enlarged view of TH35-7.5 steel mounting rail (c) Partial enlarged view of TH35-15 steel mounting rail The geometric tolerances shown in Figure A2 are additional tolerances for steel mounting rails provided separately. 2/1000
2/1000A
2/1000
(a)TH35-7.5 steel mounting rail
1/1000
1/1000A
1/1000
(b)TH35-15 steel mounting rail
Figure A2 Geometric tolerances of TH35 steel mounting railA2.1.2TH75 steel mounting rail
There is one specification:
TH75-25 steel mounting rail (75mm wide, 25mm high) has better rigidity and allows larger and heavier electrical appliances to be fixed. A2.1.2.1 Dimensions
The dimensions shown in Figure A3 apply to the full length of the mounting rail, but no inspection is done within 25mm from both ends of the rail. 58
A2.1.2.2 Form and position tolerances
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TH75 steel mounting rail cross-sectional dimensions
The form and position tolerances shown in Figure A4 are additional tolerances for the steel mounting rails provided separately. Back
1/1000
1/1000A
1/1000
Figure A4 Form and position tolerances for TH75 steel mounting railsA2.2G steel mounting rails
There is one specification:
G32-15 steel mounting rails (width 32mm, height 15mm) are mostly used to fix wiring sockets, and can also be used to fix small electrical appliances. A2.2.1 Dimensions
The dimensions shown in Figure A5 apply to the entire length of the mounting rail, but no inspection is performed within 10 mm from both ends of the rail. 59
A2.2.2 Geometric Tolerances
JB6525-92
1.5±0.05
: The geometric tolerances shown in Figure A6 of the cross-sectional dimensions of the G32-15 steel mounting rail are additional tolerances for the steel mounting rails provided separately. -2.5/1000
2/1000
2.5/1000A
A2.3C steel mounting rail
There are four specifications:
2/1000
//2.5/1000A
Figure A6G32-15 Geometric tolerances of steel mounting railsC20 steel mounting rail (width 20mm, height 10mm); C30 steel mounting rail (width 30mm, height 15mm); C40 steel mounting rail (width 40mm, height 22.5mm); -C50 steel mounting rail (width 50mm, height 30mm). Mainly used to fix electrical components.
A2.3.1 Dimensions
The dimensions shown in Figure A7 and Table A1 apply to the full length of the mounting rail, but no inspection is done within the 10mm range at both ends of the rail. 50
（a）C20 and C30 steel mounting rails
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(b）C40 and C50 steel mounting rails
Figure A7C-type steel mounting rail cross-sectional dimensions
Table A1C-type steel mounting rail dimensions
C20
C30
C40
C50
A2.3.2 Form and position guide Difference
The geometric tolerances shown in Figure A8 are additional tolerances for steel mounting rails provided separately2/1000
//2.5/1000A
Figure A8C Geometric tolerances for steel mounting rails
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Appendix B
Steel mounting rails
(Supplement)
This appendix is ​​only applicable to steel mounting rails that have been produced in China and are mainly used for fixing terminal blocks. Note: The steel mounting rails listed in this appendix are not recommended for priority. This appendix lists the size specifications and tolerance requirements of two types of steel mounting rails. For other requirements such as material properties, please refer to Appendix A. B1TH15 steel mounting rail
There is one specification:
TH15-5.5 steel mounting rail (width 15mm, height 5.5mm) is mainly used to fix small terminal blocks.
B1.1 Dimensions
The dimensions shown in Figure B1 apply to the entire length of the mounting rail, but no inspection is performed within 10 mm from the ends of the rail. 5.5-.
Cross-sectional dimensions of TH15 steel mounting rail
B1.2 Geometric tolerances
The geometric tolerances shown in Figure B2 are additional tolerances for steel mounting rails provided separately. Back 2/1000
/2.5/100dA
Figure B2 Geometric tolerances of TH15 steel mounting rails 62
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