GB/T 37751.32-2019 PDF in English
GB/T 37751.32-2019 (GB/T37751.32-2019, GBT 37751.32-2019, GBT37751.32-2019)
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Residual current operated circuit-breakers for household and similar use -- Part 3-2: Particular requirements for RCDs with flat quick-connect terminations
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Standards related to (historical): GB/T 37751.32-2019
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GB/T 37751.32-2019: PDF in English (GBT 37751.32-2019) GB/T 37751.32-2019
Residual current operated circuit-breakers for household and similar use--Part 3-2. Particular requirements for RCDs with flat quick-connect terminations
ICS 29.120.50
K31
National Standards of People's Republic of China
Residual current operated circuit breakers for household and similar purposes
Part 3-2. Flat end with flat connection
Special requirements for RCD
Part 3-2. ParticularrequirementsforRCDswithflatquick-connectterminations
(IEC 62873-3-2.2016, IDT)
Published on.2019-06-04
2020-01-01 implementation
State market supervision and administration
China National Standardization Administration issued
Content
Foreword III
1 range 1
2 Normative references 1
3 Terms and Definitions 1
4 Category 2
5 RCD features 2
6 logo and other product information 2
7 Standard conditions for normal use and installation 2
8 Structural and operational requirements 2
9 test 7
Reference 8
Foreword
GB/T 37751 "Residual current operated circuit breakers for household and similar purposes" is divided into the following sections.
--- Part 1. Overview of independent modules and unit modules for residual current electrical standards (GB/T 37751.1);
--- Part 2. Residual current electrical appliances (RCD) vocabulary (GB/T 37751.2);
--- Part 3-1. Particular requirements for RCDs with non-threaded terminals to be connected to external copper conductors (GB/T 37751.31);
--- Part 3-2. Particular requirements for RCDs with flat quick-connect ends (GB/T 37751.32);
---Part 3-3. Threaded terminal blocks with external untreated aluminium conductors and aluminium threaded connection to copper or aluminium conductors
Special requirements for type terminal block RCD (GB/T 37751.33).
This part is part 3-2 of GB/T 37751.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This section uses the translation method equivalent to IEC 62873-3-2.2016 "Residual current operated circuit breakers for household and similar purposes" 3-2
Part. Special requirements for RCDs with flat quick-connect tips.
The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows.
---GB/T 16916.1-2014 Residual current operated circuit breaker (RCCB) without overcurrent protection for household and similar purposes
Part 1. General rules (IEC 61008-1.2012, MOD);
---GB/T 16917.1-2014 Residual current operated circuit breaker (RCBO) with overcurrent protection for household and similar purposes
Part 1. General rules (IEC 61009-1.2012, MOD);
---GB/T 17196-2017 Safety requirements for flat quick-connect terminals for connecting copper wires to connecting devices (IEC 61210.
2010, MOD);
--- GB/T 37751.2-2019 Residual current operated circuit breakers for household and similar purposes - Part 2
(RCD) vocabulary (IEC 62873-2.2016, IDT).
This section has made the following editorial changes.
--- Deleted the original note 1 in Chapter 1, the original note 1 in 8.2.2, and its content has nothing to do with China.
This part was proposed by China Electrical Equipment Industry Association.
This part is under the jurisdiction of the National Low Voltage Electrical Appliance Standardization Technical Committee (SAC/TC189).
This section drafted by. Shanghai Electric Apparatus Research Institute, Zhejiang Zhengtai Electric Co., Ltd., Zhongshan Kaipu Electric Co., Ltd., Yu
Yao Jiarong Electronic Appliance Co., Ltd., Suzhou Shangdianke Electric Equipment Co., Ltd.
The main drafters of this section. Zhang Lili, Li Renjie, Peng Bo, Zou Jianhua, Qian Jiacan.
Residual current operated circuit breakers for household and similar purposes
Part 3-2. Flat end with flat connection
Special requirements for RCD
1 Scope
This part of GB/T 37751 applies to RCD with flat quick-connect tip, which has a nominal width of 6.3 mm and thickness.
0.8mm plug-in connector (see 3.2) and its associated plug connector for connecting the electrical copper guide according to the manufacturer's instructions
Line, rated current is less than or equal to 16A.
This part cannot be used alone. It must be used together with the RCD product standard (IEC 61008-1 or IEC 61009-1) for flat quick connection.
Connect the end of the RCD.
The connectable electrical copper wire is a flexible wire with a cross-sectional area of 4 mm 2 or less, or a hard wire with a cross-sectional area of 2.5 mm 2 or less (AWG
The wire gauge is equal to or greater than 12).
This section specifically applies to the RCD of the plug-in tab as an integral part.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
IEC 61008-1 Residual current operated circuit-breakers (RCCB) without overcurrent protection for household and similar purposes - Part 1. 1
General rule [Residualcurrentoperatedcircuit-breakers without integralovercurrentprotectionfor
Householdandsimilaruses(RCCBs)-Part 1.Generalrules]
IEC 61009-1 Residual current operated circuit breakers (RCBO) with overcurrent protection for household and similar purposes - Part 1. General
Rule [Residualcurrentoperatedcircuit-breakerswithintegralovercurrentprotectionforhouseholdand
Similaruses(RCBOs)-Part 1.Generalrules]
Safety requirements for flat quick-connect terminals for connecting copper conductors to IEC 61210 connecting devices (Connectingdevices-Flat
Quick-connectterminationsforelectricalcopperconductors-Safetyrequirements)
Residual current operated circuit breakers for household and similar purposes - Part 2. Residual current electrical appliances (RCD) vocabulary [Re-
Sidualcurrentoperatedcircuit-breakersforhouseholdandsimilaruses-Part 2.Residualcurrentde-
Vices(RCDs)-Vocabulary]
3 Terms and definitions
The following terms and definitions as defined by IEC 62873-2 apply to this document.
3.1
Flat quick connect end flatquick-connecttermination
The electrical connection is made up of the plug-in connection piece and the socket connector, and the socket connector can be pushed in and out with or without a tool.
3.2
Plug-in connector
A part of the quick connect end that accepts the socket connector.
3.3
Plug connector femaleconnector
A part of the quick connect end that is used to push into the plug-in tab.
3.4
Positioning buckle detent
A dimple (recess) or hole that engages with the convex portion of the plug connector on the plug-in tab as a latch for the mating portion.
4 classification
Chapter 4 of the RCD Product Standards applies.
5 RCD features
Chapter 5 of the RCD Product Standards applies.
6 logo and other product information
Except for Chapter 6 of the RCD Product Standard, the following requirements apply.
The following information on the IEC 61210-compliant connector and the type of conductor used should be given in the manufacturer's instructions.
---Manufacturer's name or trademark;
---model;
---Wire cross-sectional area and information on the color code of the insulating socket connector (see the example in Table 1);
--- Use only silver or tin plated copper alloy.
Table 1 Relationship between color code of plug connector and cross-sectional area of wire
Wire cross-sectional area
Mm2
Plug connector color code
1.5
2.5
Red or blue
Blue or yellow
7 Standard conditions for normal use and installation
Chapter 7 of the RCD Product Standard applies.
8 Structural and operational requirements
8.1 General requirements
Chapter 8 of the RCD Product Standards applies and is modified as follows.
8.1.3 applies when the socket connector is connected to the plug-in piece of the RCD.
8.1.5 does not apply.
In addition, the following requirements apply.
8.2 Terminals for connecting external conductors
8.2.1 Plug-in tabs and socket connectors shall be of a metal with sufficient mechanical strength, electrical conductivity and corrosion resistance for their intended use.
production.
Note. For example, silver-plated or tin-plated copper alloys are a more suitable solution.
8.2.2 The plug-in connecting piece has a nominal width of 6.3 mm and a thickness of 0.8 mm, and is suitable for rated currents of 16 A and below.
The size of the plug-in connection piece shall conform to the dimensions specified in Table 2 and Figures 1, 2, 3 and 4, where A, B, C, D, E, F, J,
The dimensions of M, N and Q are the dimensions that should be met.
The dimensions of the socket connector for the plug-in tab are shown in Figure 5 and Table 3.
As long as the specified dimensions are not affected and the test requirements are met, the shape of each component is allowed to differ from the shape shown (for example, corrugated
Plug-in tabs, fold-in plug-in tabs, etc.).
Verify compliance by visual inspection and measurement.
8.2.3 Plug-in tabs should be securely held.
Verify that the requirements are met by the mechanical overload test in 9.2.
Table 2 Plug-in tab size
Nominal size
Mm
size
AB
Min.
CDEFJMNPQ
Min.
6.3×0.8
dent
1.0 0.84 6.40 4.1 2.0 12° 2.5 2.0 1.8
0.7 7.8 0.77 6.20 3.6 1.6 8° 2.2 1.8 0.7 8.9
1.0 0.84 6.40 4.7 2.0 12° 1.8
0.5 7.8 0.77 6.20 4.3 1.6 8° 0.7 8.9
Note 1. Size A~Q Refer to Figure 1~4.
Note 2. When there are two values in the same column, the maximum size and the minimum size are given.
If the 45° bevel A is within the range shown, it does not have to be a straight line.
The size L is not specified, and the size may vary depending on the use case (for example, depending on the case of fixation).
The size C of the plug-in tab may consist of more than one layer of material as long as the resulting plug-in tab meets the requirements of this section in all respects. Allow insertion
The longitudinal edges of the inlet tabs are rounded.
Outside the range of Q or outside the range of (B 1.14) mm (0.043 in), the thickness C of the plug-in tab can be varied.
Each part of the plug-in connection piece shall be smooth and burr-free, but in the area around the positioning buckle of 1.3mm (0.051in) from the positioning buckle, there may be one on each side.
It is raised above the standard thickness of 0.025mm (0.001in).
Note. This figure is not used to constrain the design except for the dimensions shown.
Figure 1 Size of the plug-in tab
The locating buckle should be located within 0.076 mm (0.003 in) of the center line of the plug-in tab.
Figure 2 Dimensions of the circular dent positioning buckle (see Figure 1)
The locating buckle should be located within the centerline of the plug-in tab 0.13mm (0.005in).
Figure 3 Dimensions of the rectangular indentation locating buckle (see Figure 1)
The locating buckle should be located within 0.076 mm (0.003 in) of the center line of the plug-in tab.
Figure 4 The size of the hole-shaped positioning buckle
Sizes B3 and L2 are the dimensions that should be met.
In order to avoid mutual interference between the wires and the fully inserted plug-in tabs, the socket connector should be designed to see that the wires are over-inserted into the crimping area, or can be used
The stop prevents the wire from being inserted into the crimp area.
Note 1. If the size of the socket connector is different from that of B3 and L2, when determining the size of the socket connector, it needs to match the size of the plug-in connecting piece to ensure that
Under the most unfavorable conditions, the plug-in connection piece and the socket connector can be properly inserted (if there is a positioning buckle, it is also ensured that the positioning buckle can be correctly locked).
Note 2. If there is a positioning buckle, the size X is determined by the manufacturer to meet the performance requirements.
Note 3. This figure is not used for constrained design except for the relevant dimensions shown.
Figure 5 Dimensions of the socket connector
Table 3 Dimensions of the socket connector
Plug-in connection piece size
Mm
Plug connector size
Mm
B3 (maximum) L2 (maximum)
6.3×0.8 7.8 3.5
9 test
9.1 General requirements
Chapter 9 of the RCD Product Standard applies, but does not include 9.5.
9.2 Mechanical overload force
Test on the 10 terminals of the RCD and install and wire them under normal use conditions.
Gradually apply an axial thrust specified in Table 4 to the plug-in tab integral with the RCD, and then gradually apply one
The axial tensile force specified in Table 4. Test with a suitable test device and only once.
Table 4 Overload test force
thrust
pull
Damage to the plug-in tab or the RCD integral with the plug-in tab should not affect its continued use.
Add the following requirements after 9.8.3 of the RCD product standard.
Thin wire thermocouples should be placed so that they do not affect the contact area or the connection area. An example of the placement method is shown in Figure 6.
Figure 6 Example of thermocouple placement where temperature rise is measured
references
[1] GB/T 37751.1-2019 Residual current operated circuit breakers for household and similar purposes - Part 1
Overview of standard stand-alone modules and unit modules (IEC 62873-1.2017, MOD)
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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