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Delivery: <= 10 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 24350-2009: [GB/T 24350-2009] Selective circuit breakers for overcurrent protection for household and similar installation Status: Valid
Basic dataStandard 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---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. 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 ContentsIntroduction 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 61ForewordAll 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 breaker1 ScopeThis 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 referencesThe 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 protection3 Terms and DefinitionsGB/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 ap...... |
