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GB 24350-2009: [GB/T 24350-2009] Selective circuit breakers for overcurrent protection for household and similar installation
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[GB/T 24350-2009] Selective circuit breakers for overcurrent protection for household and similar installation
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Basic data | Standard ID | GB 24350-2009 (GB24350-2009) | | Description (Translated English) | [GB/T 24350-2009] Selective circuit breakers for overcurrent protection for household and similar installation | | Sector / Industry | National Standard | | Classification of Chinese Standard | K31 | | Classification of International Standard | 29.120.50 | | Word Count Estimation | 74,717 | | Date of Issue | 2009-09-30 | | Date of Implementation | 2010-08-01 | | Quoted Standard | GB/T 156-2007; GB/T 2900.18-2008; GB/T 3398.2-2008; GB/T 4207-2003; GB 4208-2008; GB/T 5023.1; GB/T 5023.2; GB/T 5023.3; GB/T 5023.4; GB/T 5023.5; GB/T 5023.6; GB/T 5023.7; GB/T 5169.10-2006; GB/T 5465.2-2008; GB 10963.1-2005; GB/T 16935.1-2008; GB/T 20000.1-2002; IEC 60050-441; IEC 60060-1-1989; IEC 60364-4-473-1997 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 10 of 2009 (No. 150 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard applies to AC 50 Hz: or 60 Hz, rated voltage not exceeding 440 V (white), rated current not exceeding 125 A, rated short-circuit capacity not exceeding 50000A 's SMCB. | GB 24350-2009: [GB/T 24350-2009] Selective circuit breakers for overcurrent protection for household and similar installation
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Selective circuit breakers for overcurrent protection for household and similar installation
ICS 29.120.50
K31
National Standards of People's Republic of China
Household and similar applications with selective
Over-current protection circuit breaker
Posted 2009-09-30
2010-08-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
Category 4 11
5 SMCB feature 12
6 logos and other product information 14
Standard Operating Conditions 157 used
8 structure and operation requirements 16
9 Test 23
Appendix A (informative) method to determine the short-circuit power factor of 55
Appendix B (normative) determining clearances and creepage distances 56
Annex C (normative) to verify the consistency of the applicable test procedures and the number of samples submitted (GB/T 20000.1-2002 of
2.15.1) 58
Appendix D1 (informative) in the same circuit with fuse SMCB separate set of 62
Appendix D2 (normative) on the same circuit SMCB fuse separately provided with information 62
Appendix E Empty 62
Annex F (informative) Example 63 terminals
Appendix G empty 65
Means Annex H (normative) for short-circuiting the test 66
Annex I (normative) Routine tests 68
1 self-tapping screw thread extrusion (3.3.22) 45
Figure 2 thread cutting self-tapping screws (3.3.23) 45
Figure 3 SMCB unipolar unipolar or multipolar SMCB 45
Figure 4a) with a pole protection diode SMCB 45
Fig. 4b) with two protected poles diode SMCB 45
Figure 5 three-pole SMCB (or three unipolar SMCB) 46
Figure 6 quadrupole SMCB 46
Calibration test circuit 47 in FIG. 7
Mechanical impact test apparatus of FIG. 8 (9.13.1) 48
9 standard test finger (9.6) 49
10 mechanical shock testing device (9.13.2) 50 Fig.
11 mechanical impact test apparatus swing impact member (9.13.2) 50
12 mechanical impact tests with the mounting bracket (9.13.2) 51
Figure 13 plate fixed SMCB mechanical impact tests install the sample (9.13.2) 52
14 distribution plate SMCB impact test installation example (9.13.2) 53
15 rail mounting power SMCB mechanical tests applied (9.13.2.3) 54
16 Ball pressure test apparatus 54
17 cascade with 154
Figure B. 1 creepage distances recommended application illustrated 56
Figure B. 2 creepage distances recommended application illustrated 57
Figure F. Example 1 pillar terminals 63
Figure F. 2 screw terminals and screw terminals Example 64
Figure F. 3 saddle terminals Example 64
Figure F. 4 lug type terminals Example 65
Figure H. 1 test device 66
Figure H. 2 grid 67
Figure H. 3 grid circuit 67
Table 1 Rated voltage standard value of 13
Table 2 tripping characteristic standard value 14
Relationship Table 3 Rated impulse withstand voltage and the nominal voltage of the device 14
Table 4 Minimum clearances and creepage distances 17
Table 5 copper wire cross-sectional area of the screw-type terminal can be connected 18
Temperature rise Table 6 20
Table 7 Time - Current Operating Characteristic 21
Table 8 Table 23 Type tests
Table 9 rated current corresponding test copper wire cross-sectional area S 24
Table 10 screw thread diameter and the applied torque 24
Table 11 Rally 25
26 Table 12 Wire Size
Table 13 SMCB rated impulse withstand voltage test and verify the location of the relevant altitude suitable for isolation
The test voltage disconnect between the contacts 28
Table 14 9.7.6.1 not verify the test portion of the test voltage impulse withstand voltage 29
Table 15 Maximum power consumption 30 per pole
Table 16a) with a cascade of life under short circuit conditions (for E type SMCB) 32
Table 16b) with a cascade of life under short circuit conditions (for Cs type SMCB) 33
Table 17 short-circuit test of the applicability of 33
Power factor from Table 18 of the test circuit 35
Ratio coefficient table 19 short-circuit capacity (Ics) and rated short-circuit capacity (Icn) between the K 38
Table 20 monopole and dipole SMCBIcs test program 38
Table 21 three and four pole SMCBIcs test procedure 39
Table 22 rated voltage of 230/400V three-phase unipolar SMCB test Ics Test Procedure 39
Table 23 Icn Test Procedure 39
Table 24 Rated voltage three-phase unipolar SMCB test 230/400V Test program 40 of Icn
Table 25 Short circuit selectivity test value 41
Table C. 1 Test Procedure 58
Table C. The number of samples 2 full test program 59
Table C. Number of samples in a series of 3 different numbers of poles SMCB reduced 60
Table C. 4 SMCB a series of different tripping characteristics of test procedures 61
Foreword
All the technical contents of this standard is mandatory.
The standard reference GB 10963.1-2005 "electrical accessories for household and similar circuit breakers for overcurrent protection - Part 1.
Circuit breakers "and German standards EDINVDE0641-21.2008" in exchange for household and similar use with selective protection of the main circuit breaker
(SH- breaker) "(in German) developed.
The standard in terms of operational performance, such as the use of the short-circuit capacity GB 10963.1-2005 "electrical accessories for household and similar uses
Current protection circuit breakers - Part 1. For AC circuit breaker "in the corresponding requirements and test methods, but according to household and similar applications
Scope and special protection requirements of selective overcurrent protection circuit breaker with selective (hereinafter referred SMCB) of this standard clear.
1) SMCB intended for use in pollution degree 3 environment;
2) the standard value SMCB rated impulse withstand voltage (Uimp) is 6kV;
3) SMCB time - current tripping characteristic of E characteristics and/or Cs properties.
This standard adds.
1) Verify SMCB selective protection related requirements and test methods (cascade with a life test under short circuit conditions,
Selective short-circuit test);
2) with a front access fuse backup protection verification tests.
This standard GB/T 1.1-2000 be written.
The Standard Appendix B, Appendix C, Appendix D2, Appendix H, Appendix I are normative appendices, Appendix A, Appendix D1, Appendix F, Appendix J is
Informative appendix, Appendix E, Appendix G temporarily empty.
The standard proposed by China Electrical Equipment Industrial Association.
The low-voltage electrical standard by the National Standardization Technical Committee (SAC/TC189) centralized.
This standard is drafted by. Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd.
Drafting of this standard. Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd., France and Thailand Electric (Jiangsu) Co., Ltd., Shanghai
Electrical Ceramics Co., Ltd. factory.
Participated in the drafting of this standard. Siemens Circuit Protection Systems Ltd., Beijing ABB Low Voltage Electric Co., Ltd., Huizhou Hager
Ltd., Schneider Electric (China) Investment Co., Ltd., Beijing People's electrical plant, Zhejiang Chint Electric Co., Ltd., Shanghai Electric Nader
Device Co., Ltd., Shanghai Electric Co., Ltd. Lean, West Germany Electric Co., Ltd. People Electric Group Co., Ltd. JU Bang Electric has
Limited, Universal Holdings Limited.
The main drafters of this standard. Chen Ying, Zhou Gang plot, Chang Chun Gong, Yu Guorong, Linhai Ou.
Participation drafters of this standard. package Yao Zhang, Wang farming, Wang Dianguang, Sun Haitao, Zhao group, Wang Xianfeng, Zhang Lanjing money Shikun, Huang Rongrong,
Gao Yue, Wang Li Fan, Li Lifang, Ding Gaofeng, Xue Han, Wu Hui.
This standard is the first release.
Household and similar applications with selective
Over-current protection circuit breaker
1 Scope
This standard specifies.
a) SMCB characteristics;
b) SMCB in the following areas shall comply with the conditions.
1) SMCB running and working conditions during normal operation;
2) SMCB running and working conditions when the overload;
3) SMCB running and working conditions at the rated short-circuit capacity and under short circuit;
4) SMCB dielectric properties;
5) SMCB selectivity;
c) the test method used to identify and test these conditions used to meet;
d) data on SMCB flag;
e) certification test program performed and the number of samples submitted (see Appendix C);
f) under short-circuit conditions, SMCB connected in the same circuit, followed in line with GB 10963.1-2005, limiting class in accordance with Annex
J recorded requested B, C and similar household characteristics for overcurrent protection circuit breaker (hereinafter referred to as MCB) complexes and its work
As a condition;
g) Routine tests (see Appendix I).
Note. The "normal conditions" meaning refers SMCB be used in accordance with the manufacturer's specifications.
This standard applies to AC 50Hz or 60Hz, rated voltage not exceeding 440V (phase), rated current not exceeding 125A, rated short
Road capacity is not more than the 50000A SMCB.
These SMCB are used to protect buildings and line facilities cable overcurrent and similar purposes, they are designed for untrained
The personnel, and no maintenance.
SMCB intended for use in pollution degree 3 environment.
SMCB suitable for isolation.
SMCB should be able to meet before and after class overcurrent protection device selectivity requirements under technical conditions specified in this standard.
It meets IEC 60364-4-473.1997 + A1.1998 requirements, the standard SMCB also suitable for use in IT systems.
For the IP20 degree of protection higher than GB of SMCB 4208-2008, often in harsh environments and spaces (for example. too wet, overheating,
Cold or dust deposition) and in hazardous locations (for example. places prone to explosion) under these SMCB use may require special construction.
For vehicles equipped with residual current protection device (RCD) SMCB technical requirements are under consideration.
See SMCB fuse with Appendix Appendix D1 and D2.
This standard contains the type tests to ensure compliance with the operating characteristics of the characteristics of such devices must be required of all the technical requirements.
This standard also includes tests to ensure reproducible results necessary details of test requirements and test methods related.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 156-2007 standard voltage (IEC 60038.2002, MOD)
GB/T 2900.18-2008 Electrotechnical term low-voltage electrical
GB/T 3398.2-2008 Plastics - Determination of hardness - Part 2. Rockwell hardness (ISO 2039-2. 1987, IDT)
GB/T 4207-2003 solid insulating materials under moist conditions index tracking of the measuring method and the proof tracking index compared
(IEC 60112. 1979, IDT)
GB 4208-2008 housing protection (IP Code) (IEC 60529.2001, IDT)
GB 5023 (all parts) rated voltage 450/750V and below PVC insulated cables (IEC 60227, IDT)
GB/T 5169.10-2006 Fire hazard testing for electric and electronic products - Part 10. Glowing/hot wire based test methods for burning
Hot wire apparatus and common test procedure (IEC 60695-2-10.2000, IDT)
GB/T 5465.2-2008 Graphical symbols for electrical equipment - Part 2. Graphical symbols (IEC 60417DB.2007, IDT)
GB 10963.1-2005 electrical accessories for household and similar circuit breakers for overcurrent protection - Part 1. a communication break
Circuit breaker (IEC 60898-1.2002, IDT)
GB/T 16935.1-2008 within low-voltage systems Insulation coordination for equipment - Part 1. Principles, requirements and tests (IEC 60664-1.
2007, IDT)
GB/T 20000.1-2002 Guide for standardization - Part 1. General vocabulary of standardization and related activities (ISO /IEC refers
South 2.1996, MOD)
IEC 60050-441 International Electrotechnical Vocabulary Chapter 441. switch boards, switch gear and fuses
IEC 60060-1. 1989 high-voltage test techniques - Part 1. General definitions and test requirements
IEC 60364-4-473.1997 Electrical installations of buildings Part 4. Protection for safety Chapter 47. Application of security measures
Section 473. overcurrent protection
3 Terms and Definitions
GB/T 2900.18-2008 established and the following terms and definitions apply to this standard.
3.1 Electric
3.1.1
For making and breaking one or more electrical circuits in current devices.
3.1.2
With separable contacts to open or close one or more electrical circuit switching equipment.
3.1.3
When the current exceeds a given value for a sufficient time to melt through one or more specially designed and proportionate melt off their access circuit
And breaking current switching equipment.
3.1.4
Can turn, carrying and breaking currents under normal circuit conditions and under specified abnormal circuit conditions such as short circuit current, but also to take
Pass, carrying a certain time and breaking current automatic mechanical switching equipment.
3.1.5
One kind of current-limiting circuit breaker. Can turn, carrying and breaking current in the circuit. In particular, it should be able to take place in the lower loop over separation
Under the current circumstances, if the lower-level overcurrent protection device can cut off the current, limiting itself only and does not cut off the overcurrent. Meanwhile, in the present
Under the conditions specified in the standard, it should be able to meet on the lower level overcurrent protection device selective protection requirements.
3.1.6
3.2 General terms
3.2.1
Any current exceeding the rated current.
3.2.2
Current generator electrically lossless circuit too.
Note. If the overload current for a long enough period of time may also cause damage.
3.2.3
During normal operation, the impedance between the potential of different parts of negligible faults resulting overcurrent.
Note. The short-circuit current may be caused by a fault may also be caused by an incorrect connection.
3.2.4
Including all conductive parts SMCB in its closed and open circuit inside.
Note. completely or partially connected in parallel with the main circuit to circuit called a sub-circuit can also be seen as the main circuit.
3.2.5
SMCB for closing or opening operation or operations for both circuits (except the main current path of the circuit).
NOTE. The control circuit of the power supply is connected through power grid applied.
3.2.6
All conductive parts in addition to the main circuits and control circuits outside the SMCB included in the SMCB.
3.2.7
SMCB components only with a separate conductive paths connected to the main circuit, the main circuit itself has a touch for connecting and disconnecting
head. It does not include those for the respective poles of each pole together and operate together parts.
3.2.7.1
Over-current release (see 3.3.6) pole.
3.2.7.2
No over-current release (see 3.3.6) of the pole, but in other respects the same SMCB usually very protective with the same
performance.
Note 1. To ensure compliance with the technical requirements of the unprotected pole may protect the gate structure identical or special structure.
Note 2. If the unprotected pole short-circuit capacity and protection very different, marked by the manufacturer.
3.2.7.3
Only for opening and closing the neutral line need to have an extremely short-circuit capacity.
Note. When SMCB off, opening and closing to allow neutral pole remains closed.
3.2.8
SMCB ensure the continuity of the main circuit a predetermined position.
3.2.9
There predetermined position clearances between the main circuit to ensure SMCB break contact.
3.2.10
3.2.10.1
Under specified conditions determined SMCB surrounding air temperature (for enclosed SMCB, refers to the air temperature outside the enclosure).
3.2.10.2
As the time - overcurrent characteristic reference ambient air temperature.
3.2.11
Movable contacts conversion or reverse conversion from the open position to the closed position.
NOTE. If the operation should be distinguished is the electrical sense (ie, making and breaking) referred to the opening and closing operation, and the operation in the mechanical sense (ie closing and opening) said
Mechanical operation.
3.2.12
Conversion from one position to another and then back to the starting position of continuous operation.
3.2.13
Continuous operation with a predetermined time interval specified.
3.2.14
SMCB main contact in the closed position, through a long period of uninterrupted work at a steady current system (power-on time can be a few stars
Period, months or even years).
3.2.15
Each test SMCB in the manufacture and/or after manufacture conducted to determine if it meets certain criteria.
3.3 structural components
3.3.1
SMCB main circuit contacts in the closed position to carry the current of the main circuit.
3.3.2
Arcing contacts formed thereon.
Note. The primary contact arcing contact and can be designed the arcing contacts into a single contact, it contacts other than after the first opening and closing, in order to protect other
Contacts from damage.
3.3.3
SMCB connected to the control circuit by SMCB contacts mechanically operated.
3.3.4
Connected to the auxiliary circuit and mechanically operated by SMCB contacts (for example, used to indicate the position of the contacts).
3.3.5
And on SMCB mechanical connection (or the composition of the whole), to release the retaining mechanism and SMCB automatic disconnection device.
3.3.6
When the release of the current exceeds a predetermined value, so that there is a delay or no delay SMCB disconnect the trip.
Note. In some cases, this value may be related to the rate of current rise.
3.3.7
And over-current delay value is inversely proportional to the operation after overcurrent release.
NOTE. This release may be designed to over-current is large, approaching a minimum of delay determined.
3.3.8
SMCB directly from the main circuit current excitation of overcurrent release.
3.3.9
Used as overload protection overcurrent release.
3.3.10
It can be conductive, but not necessarily used to carry the operating current member.
3.3.11
Under normal circumstances do not live, but may become live under fault conditions is easily accessible conductive parts.
NOTE. Typical exposed conductive member is a metal wall of the housing and metal parts and other operations.
3.3.12
Terminals are SMCB conductive member may be re-used with an external circuit electrical connections.
3.3.13
Wiring for connecting a wire and subsequent disconnection of these wires, or for two or a few detachably interconnecting wires
Terminal, which is connected directly or indirectly with a variety of screws or nuts to complete.
3.3.14
Wire into a hole or cavity, by the end of the screw to compress screw-type terminal lead, which can be used directly by the screw fastening pressure
Nail ends or applied through a transition element of pressure applied by the end of the screw.
NOTE. The sample pillar terminals are shown in Figure F. 1.
3.3.15
Wire fastening screw head below the screw-type terminal. The clamping pressure may be applied directly or through a transition to zero by the head of the screw
Member, such as. gaskets, plywood or a locking device is applied.
NOTE. Screw terminals example shown in Figure F. 2.
3.3.16
The conductor is clamped under a nut screw-type terminal. The clamping pressure can be directly from a suitably shaped nut or through an applied
Transition parts, such as. gaskets, plywood or a locking device is applied.
Note. Examples of stud terminals are shown in Figure F. 2.
3.3.17
Wire fastening screw-type terminal in the saddle plate by two or more screws or nuts.
NOTE. saddle terminals example shown in Figure F. 3.
3.3.18
Using a screw or nut fastening screw terminals or screw terminals cable lug or bus.
NOTE. The sample lug type terminals is shown in Figure F. 4.
3.3.19
Wiring for connecting a wire and subsequent disconnection of these wires, or for two or a few detachably interconnecting wires
Terminals. Which is connected directly or indirectly to complete by means of springs, wedges, eccentrics or cone wheel, etc., in addition to strip the insulation, the need for lead
Line for special processing.
3.3.20
3.3.21
Screwed deformation resistance with high deformation resistance material than the material of low screw hole screws.
Tapered screw threads, bore their ends threaded conical shape.
Threaded by the screw action generated to reliably formed only after the screw is rotated a sufficient number of turns beyond the threaded portion of the cone.
3.3.22
Tapping screw having a continuous thread, the thread does not function from the hole cutting material.
NOTE. Thread tapping screw extrusion molding example is shown in Figure 1.
3.3.23
Tapping screw having a discontinuous thread, which has a threaded hole from cutting the material functions.
Note. The thread cutting self-tapping screws example shown in Figure 2.
3.4 Operating Conditions
3.4.1
SMCB conversion from the open position to the closed position of the operation.
3.4.2
SMCB from the closed position to the open position of the operation.
3.4.3
Entirely by human action is directly applied, so that the speed and force of the operation depends on the action of the operator.
3.4.4
Energy derived from human, and storage and release of stored energy operating in a continuous operation, and thus the operation speed and force of the operator's move
As irrelevant.
3.4.5
After the closing operation starts, if the automatic opening operation, even if the instruction remains closed, its movable contact can return to and remain in the open position
The SMCB.
NOTE. To ensure the normal breaking the current may have been generated, you may need to make the contacts momentarily reach the closed position.
3.5 characteristic value
Unless otherwise specified, all current and voltage are RMS.
3.5.1
Used to determine the value of any one characteristic of a predetermined amount of SMCB design and manufacture of working conditions.
3.5.2
SMCB)
If the impedance of each pole with a negligible wire SMCB instead, the current flowing in the circuit.
Note. The current can also be expected as an actual current, for example. prospective breaking current, prospective peak current.
3.5.3
After switching on the expected peak transient current.
Note. This definition assumes that the current is ideal SMCB turned on, that is, its zero impedance instantaneously change from the infinite, current can flow through several different paths
Circuits, such as multi-phase circuit, this definition further assumes that the current is turned on simultaneously in all poles, even considering only the current one pole.
3.5.4
Current switched occur that may lead to the moment of the maximum prospective peak current when.
Note. For multi-phase multi-pole circuit SMCB, refers only to the maximum expected peak current unipolar.
3.5.5
Under specified conditions, with SMCB to access, load and breaking their off-time AC component of the prospective current with an effective value of.
3.5.5.1
Under the test procedure, which does not include the specified conditions SMCB carrying the appointed time at rated current breaking capacity.
3.5.5.2
Under the test program, which prescribed conditions include SMCB carrying the appointed time at rated current breaking capacity.
3.5.6
In the process of breaking arc is generated at the moment a very SMCB current flowing.
3.5.7
Just before turning current is applied between the terminals SMCB a pole voltage.
Note. This definition refers to the monopole SMCB. Multi-polar SMCB, the applied voltage is the voltage between the power supply terminal SMCB.
3.5.8
After breaking current between terminals SMCB pole voltage appearing.
Note 1. This voltage may think there are two successive time intervals, the first one appeared transient voltage interval, followed by a second time interval only appear
Power frequency recovery voltage.
Note 2. This definition refers to the monopole SMCB. Multi-polar SMCB, recovery voltage is the voltage between the power supply terminal SMCB.
3.5.8.1
During the time a significant feature of the transient recovery voltage.
Note. Depending on the characteristics of the circuit and SMCB transient voltage may be oscillatory or non-oscillation of both. This includes a multi-phase circuit voltage neutral point shift
Voltage.
3.5...
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