1、ICS 点击此处添加 ICS 号点击此处添加中国标准文献分类号 T/CEC中 国 电 力 企 业 联 合 会 团 体 标 准T/CEC- XXXXTechnical specification of external circuit-breaker for electricity meters电能表用外置断路器技术规范点击此处添加与国际标准一致性程度的标识（征求意见稿）XXXX - XX- XX 发布 XX XX- XX- XX 实施发 布T/CECXXXXContentsForeword III1 Scope 12 Normative references 13 Terms and defi
2、nitions 14 Classification and characteristics requirements 25 Requirements for structural control .56 Technical requirements 87 Test method . 138 Packaging, transportation, storage 18Annex A (Informative) Dimension drawing of external circuit-breaker for electricity meter 19T/CECXXXXForewordThis sta
3、ndard is drafted in accordance with the rules of GB/T 1.1 2009. This standard is proposed by China Electricity Council. This standard is under the jurisdiction of Electric Power Industry Standardization Technical Committee (DL/TC22). Drafting organizations of this standard include XXXXXXIf you have
4、any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further informationThis standard is the first release.T/CECXXXX0Technical specification of circuit-breakers for
5、 electricity meters1 ScopeThis standard states the classification, type of structure, technical requirements, test methods and so on of the external circuit-breakers for electricity meters (hereinafter referred to as circuit-breaker).This standard applies to a.c. circuit-breaker for operation at 50H
6、z, 60Hz or 50/60Hz, hacing a rated voltage not exceeding AC 400 V, a rated current not exceeding 125 A，and rated short-circuit breaking capacity not less than 6000 A.2 Normative referencesThe following documents are indispensable for the application this document. For dated reference, only the editi
7、on cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.GB/T 18042000 General tolerances Tolerances for linear and angular dimensions without individual tolerance indicationsGB 10963.12005 Electrical accessories- Circuit-breakers for
8、 over current protection for household and similar installation- Part 1 :Circuit-breakers for a. c. operationGB 14048.1-2012 Low-voltage switchgear and controlgear - Part 1:General rulesGB/T 17626.22006 Electromagnetic compatibility（EMC）-Testing and measurement techniques-Electrostatic discharge imm
9、unity testGB/T 1762 6.42008 Electromagnetic compatibility-Testing and measurement techniques-Electrical fast transient/burst immunity testGB/T 17626.52006 Electromagnetic compatibility-Testing and measurement techniques - Surge immunity testGB 177012008 Circuit-breaker for equipmentGB/T 193342003 Di
10、mension of low-voltage switchgear and controlgear - Standardized mounting on rails for mechanical support of electrical devices in switchgear and controlgear installationsGB/T 206452006 Specific environmental condition - Technical requirements of low-voltage apparatuses for plateauGB/T 265722011 Req
11、uirements of concentration limits for certain restricted substances in electrical and electronic productsIEC 62055-31:2005 Electricity metering - Payment systems - Part 31：Particular requirements - Static payment meters for active energy ( classes 1 and 2) ）3 Terms and definitionsT/CECXXXX1For the p
12、urpose of this document, the terms and definitions given in GB 14048.12012, as well as the following apply.3.1 circuit-breakerMechanical switching device, capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying for a specified time and breaking cur
13、rents under specified abnormal circuit conditions (such as short-circuit condition).SOURCE: GB 14048.1, 2.2.113.2 external circuit-breaker for electricity metersThe circuit-breaker，installed externally and cooperated with the electricity meter to control its opening and closing operation.3.3 automat
14、ic opening and closing operationOpening and closing operation of the circuit-breaker that, by means of remote control signals from master station or other equipment.(Operation of opening or closing the circuit breaker by remote control signals from the master station or other equipment)3.4 automatic
15、 opening and closing timeTime measured from the instant at which the circuit-breaker receives the opening or closing signal to the instant when opening or closing operation is accomplished.3.5 inner shaft drive mode Driving mode that enables each pole to operate together by means of integral shaft i
16、n the circuit breaker.3.6 power-on delay timeThe interval time between the powering-up and ready for response to control signal.(The duration from the instant of power-on to the instant at which the breaker is ready to respond to a control signal)3.7synchronous timeT/CECXXXX2The time period among ea
17、ch pole of the circuit-breaker to complete its opening or closing operation.(Time difference among all poles of a breaker to complete its opening or closing operation.)4 Classification and performance requirements4.1 Classification4.1.1 According to the number of polesAccording to the number of pole
18、s:a) 1P+N, two-pole circuit-breakers with one protected pole;b) 2P, two-pole circuit-breakers with two protected poles;c) 3P, three-pole circuit-breakers with three protected poles;d) 3P+N, four-pole circuit-breakers with three protected poles;e) 4P, four-pole circuit-breakers with four protected po
19、les.Note: The pole which is not a protected pole can be “switched neutral”.4.1.2 According to installation methods (According to the method of mounting）a) Surface-type;b) Flush-type;c) Panel board type, also referred to as distribution board type.Note: These types may be intended to be rail mounted.
20、4.1.3 （According to the method of control）According to the method of control:a) Manual control, to close and open manuallyb) Semi-automatic control, to close manually and open automatically,c) Automatic control, to close and open automatically,d) Semi-automatic or Remote automatic control selection
21、mode, Having mode switch for selection of manual or automatic mode. When in manual mode, functioning as in remote semi-automatic control mode. When in automatic mode, functioning as in remote automatic control mode.4.1.4 According to the instantaneous tripping currenta) B-type; b) C-type; c) D-type.
22、Note : The selection of a particular type can depend on the installation rules.T/CECXXXX34.2.1 Characteristics requirements4.2.2 Control signal voltageThe rated control signal voltage shall be AC 220V.4.2.2 Rated voltage（U e）Preferred values of rated voltage are given in Table 1.Table 1 Preferred va
23、lues of rated voltageCircuit-breakers Circuit supplying the circuit-breakerRated voltage of circuit-breakers for use in systems 230 V、230/400 V、400 VVRated voltage of circuit-breakers for use in systems 240 VVSingle phase (phase to neutral or phase to phase) 230 /Three-phase four-wire 230 /Single po
24、le Single-phase（phase to neutral ）or three phase，using three single-pole circuit-breakers（three-wire or four-wire）230/400 /Single phase（phase to neutral or phase to phase） 230 /Single phase（phase to phase） 400 240Single phase（phase to phase, three-wire） / 240Two-poleThree phase （four-wire） 230 /Thre
25、e-pole Three-phase （three-wire or four-wire） 400 240Four-pole Three-phase （four-wire） 400 /Note 1：In IEC 60038，the network voltage value of 230/400 V has been standardized. This value will progressively supersede the values of 220/380 V and 240/415 V.Note 2： Wherever in this standard there is a refe
26、rence to 230 V or 400 V, they can be read as 220 V or 240 V, 380 V or 415 V, respectively.Note 3： Wherever in this standard there is a reference to 240 V, they can be read as 200 V.4.2.3 Rated insulation voltage（U i） The rated insulation voltage shall not be less than 500 V.4.2.4 Rated impulse withs
27、tand voltage（U imp）The rated impulse withstand voltage shall not be less than 6 kV.4.2.5 Rated current（I n）Preferred values of rated current are: 40 A, 63 A, 80 A, 100 A and 125 A.T/CECXXXX44.2.6 Rated frequency（f n）Standard values of rated frequency are 50 Hz and 60 Hz.4.2.7 Rated short-circuit cap
28、acity（I cn）The rated short-circuit breaking capacity shall not be less than 6000 A.4.2.8 Automatic closing time（t c）tc3 s。4.2.9 Synchronous timeThe synchronous time of a circuit-breakershall meet the requirements of its product specification.4.2.10 Power- on delay time（t e）The power-up delay time of
29、 circuit-breakers should be satisfied with the requirements of the product specification.(The power-on delay time of a circuit breaker shall meet the requirements of its product specification.)4.2.11 Rated control signal voltage（U c）The rated control signal voltage shall be AC220 V.4.2.12 Control si
30、gnal current（I c）Ic1 mA。4.2.13 Closing phase leakage current（IL1）Steady-state current loss per phase shall be less than 0.2 mA when the control units are at the closed position.4.2.14 Opening phase leakage current （IL2）Steady-state current loss per phase shall be vless than 0.2 mA when the control u
31、nits are at the open position.4.2.15 Power lossThe maximum permissible values per pole of circuit-breakers are indicated in Table 2.Table 2 Maximum power loss per poleRange of rated current InAMaximum power loss per poleW32I n40 6.540I n50 850I n63 11.5T/CECXXXX563I n100 13.5100I n125 184.2.16 Pollu
32、tion degreeCircuit-breakers to this standard are intended for environment with pollution degree 2, i.e. normally only non-conductive pollution occurs; occasionally, however, a temporary conductivity caused by condensation may be expected.5 Constructional requirements5.1 GeneralCircuit-breakers shall
33、 be so designed and constructed that, in normal use, their performance is reliable and without danger to the user or surroundings. Compliance is checked by carrying out all the relevant tests specified.5.2 AppearanceMetal parts of the circuit breaker shall be adequately plated and coated against rus
34、ting. Metal parts shall not have cracks, pitting or peeling. The surface of the plastic parts shall be smooth without blisters, cracks, dents, or other defects.External parts which are accessible when operating the circuit-breaker shall be made of insulating material.Dimensions of circuit-breakers a
35、re specified in Annex A5.3 Operating mechanismThe operating mechanism of a circuit breaker shall meet the following requirements:a) The operating parts must be flexible and reliable, and it shall have a trip-free mechanism;b) For automatic control a power operating mechanism shall be provided；c) The
36、 moving contacts can come to rest only in the closed or open position, even if the operating member is tripped in an intermediate positiond) The circuit breaker shall be provided with an operating handle for manually opening and closing, the operating handle must be secured reliably；e) Good insulati
37、on between operating handle and live parts should be realized to ensure safety；f) The moving contacts of all poles of multipole circuit breakers shall be so mechanically coupled that all poles, except the switched neutral, make and break substantially together, even if an overload occurs on one prot
38、ected pole only.g) The switched neutral pole, if available, shall not close after and shall not open before the protected poles；h) If a pole having an appropriate short circuit making and breaking capacity is used as a neutral pole, and the circuit breaker is independent of manual operation, all pol
39、es include the neutral pole may operate substantially together；T/CECXXXX6i) Except in manual control mode, when receiving a trip command, thea circuit breaker shall open automatically and the moving contacts shall stay in the open position, and couldnt be closed manually；j) A breaker under closing c
40、ommand shall allow manually open or close. After opening, it shall stay in open position in case of a power-off and reenergizing；For a circuit breaker supporting automatic control mode, the automatic closing module shall employ a totally enclosed construction with inner shaft driving, to realize aut
41、omatic closing function and to ensure moving contacts stay in the open position when manually closing a break which is in open state. 5.4 Isolation protectionEach pole of circuit-breakers shall reliably break in the open position. Circuit-breakers shall provide in the open position an isolation dist
42、ance in accordance with the requirements necessary to satisfy the isolating function. Indication of the open and closed position of the main contacts shall be provided by both of the following means:a) the position of the actuator;b) a separate mechanical indicator.5.5 (Mechanical indicator and actu
43、ator)Indication of the open and closed position of the main contacts shall be provided.It shall be possible to switch the circuit-breaker on and off by hand. A mechanical indicator is used to indicate the position of the contacts, this shall show the symbol “|” (or “closed”, “ON”, “red”) for the clo
44、sed position and the symbol “” (or “open”, “OFF”, “green”) for the open position (OFF).Indication of the contact position shall be reliable.Circuit-breakers shall be designed so that the actuator, front plate or cover can only be correctly fitted in a manner which ensures correct indication of the c
45、ontact position.5.6 Mode selection switchFor circuit-breakers with semi-automatic and automatic control mode, a mode switch shall be provided in the front to select semi-automatic control mode and remote automatic control mode.Mode switch shall be designed on the frontal side of the circuit-breaker,
46、 and with the identification of “Automatic” and “Manual” for indicating the mode at present.Protection measures shall be taken to prevent the mode switch from tampering and it shall not be possible to select a mode without the aid of a tool.5.7 Screws, current-carrying parts and connections5.7.1 Scr
47、ews and connectionsConnections, whether electrical or mechanical, shall withstand the mechanical stresses occurring in normal use.5.7.2 Electrical connectionsElectrical connections shall be so designed that contact pressure is not transmitted through insulating material other than ceramic, pure mica
48、 or other material with characteristics no less suitable, unless there is T/CECXXXX7sufficient resilience in the metallic parts to compensate for any possible shrinkage or yielding of the insulating material.5.7.3 Current-carrying parts and connectionsCurrent-carrying parts including parts intended
49、for protective conductors shall be made ofcopper;an alloy containing at least 58 % copper for parts worked cold, or at least 50 % copper for other parts; other metal or suitably coated metal, no less resistant to corrosion than copper and having mechanical properties no less suitable.Note: In case of using ferrous alloys or suitably coated ferrous alloys, compliance to resistance to corrosion is checked by a test of resistance to rusting. The requirements of this subclause do not apply to contacts, magnetic circuits, heater
