CSA C22 2 NO 39-2013 Fuseholder assemblies (Fifth Edition).pdf

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1、C22.2 No. 39-13Fuseholder assembliesLegal Notice for StandardsCanadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpo

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13、lity that some of the elements of this standard may be the subject of patent rights. CSA Group shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own

14、responsibility.Authorized use of this documentThis document is being provided by CSA Group for informational and non-commercial use only. The user of this document is authorized to do only the following:If this document is in electronic form:sLOADTHISDOCUMENTONTOACOMPUTERFORTHESOLEPURPOSEOFREVIEWING

15、ITsSEARCHANDBROWSETHISDOCUMENTANDsPRINTTHISDOCUMENTIFITISIN0$(b) provide an explanation of circumstances surrounding the actual field condition; and(c) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.Committee interpretations are processed

16、 in accordance with the CSA Directives and guidelines governing standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.(5) This Standard is subject to a review within five years from the date of publication. Suggestions for its improvement will be re

17、ferred to the appropriate committee. To submit a proposal for change, please send the following information to inquiriescsagroup.org and include “Proposal for change” in the subject line:(a) Standard designation (number);(b) relevant clause, table, and/or figure number;(c) wording of the proposed ch

18、ange; and(d) rationale for the change. 2013 CSA Group Fuseholder assembliesMarch 2013 1C22.2 No. 39-13Fuseholder assemblies1Scope1.1This Standard covers fuseholders and devices for fuses to be employed in electrical circuits and are intended to be used in accordance with the Canadian Electrical Code

19、, Part I.1.2This Standard covers(a)fuseholders intended for use with fuses covered by the CAN/CSA-C22.2 No. 248 series of Standards when no fuseholder is specified in the CAN/CSA-C22.2 No. 4248 series;(b) High rupture capacity (HRC) fuses not exceeding 6000 A and 600 V and conforming to CSA C22.2 No

20、. 106; and(c) fuseholder accessories (e.g., covers, indicators, adapters, etc.).1.3This Standard does not cover fuseholders for renewable fuses (i.e., Class H-Renewable fuses) which are covered by CSA C22.2 No. 4248.6, Fuseholders, Part 6, Class H.1.4This Standard specifies requirements for the oper

21、ating conditions, classification and characteristics, construction, tests, and markings of fuseholders.1.5In CSA standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendati

22、on or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard.Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the

23、text explanatory or informative material.Notes to tables and figures are considered part of the table or figure and may be written as requirements.Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application. 1.6The values given in SI units are the units of

24、record for the purposes of this Standard. Any other values given are for information purposes only.2 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.C22.2 N

25、o. 39-13 2013 CSA Group2 March 2013CSA GroupC22.1-12Canadian Electrical Code, Part ICAN/CSA-C22.2 No. 0-10General Requirements Canadi an Electrical Code, PartIICAN/CSA-C22.2 No. 0.17-00 (R2009)Evaluation of properties of polymeric materialsCAN/CSA-C22.2 No. 4-04 (R2009)Enclosed and dead-front switch

26、esC22.2 No. 5-13Molded-case circuit breakers, molded-case switches and circuit-breaker enclosuresCAN/CSA-C22.2 No. 0.14-05Industrial control equipmentC22.2 No. 29-11Panelboards and enclosed panelboardsC22.2 No. 31-10Switch-gear assembliesC22.2 No. 65-13Wire connectorsC22.2 No. 106-05 (R2010)HRC-Misc

27、ellaneous fusesC22.2 No. 142-M1987 (R2009)Process control equipmentC22.2 No. 153-09Electrical quick-connect terminalsC22.2 No. 158-10Terminal blocksCAN/CSA-C22.2 No. 248 series of StandardsLow-voltage fusesCAN/CSA-C22.2 No. 4248 series of StandardsFuseholdersCAN/CSA-C22.2 No. 60529:05 (R2010)Degrees

28、 of Protection Provided by Enclosures (IP Code)3 DefinitionsThe following definitions shall apply in this Standard:Ambient temperature the temperature of the air (or medium) surrounding the fuseholder. 2013 CSA Group Fuseholder assembliesMarch 2013 3Clearance the shortest distance in air between two

29、 conductive parts.Cold-moulded composition may consist of materials such as phenolic, melamine, or melamine-phenolic compounds, and includes materials having filler systems of fibrous (other than synthetic organic) types; but, excludes fibre reinforcement systems using resins that are applied in liq

30、uid form. Synthetic organic fillers are considered acceptable at temperatures not greater than 105 C. Cold-moulded composition may also consist of inorganic (e.g., hydraulic cement) compounds.Contacts the parts of the fuseholder that provide electrical contact between the fuse (fuse-link) and the fu

31、seholder.Creepage the shortest distance along the surface of the insulating material between two conductive parts.Dummy fuse a device used during the test for verification of temperature rise.Enclosed fuseholder an insulated enclosure that holds, supports, and surrounds the fuse. Notes: (1) Exposed

32、terminals are typically inaccessible from the outside of equipment after installation.(2) Types of enclosed fuseholders include panel mount, in-line, and modular fuseholders.Fuseholder a device that(a)provides mechanical support for a fuse;(b) maintains creepage and clearance for a fuse;(c) provides

33、 means to connect a fuse in a circuit; and(d) allows for fuse replacement.Fuse a protective device that opens a circuit during specified overcurrent conditions by means of a current-responsive element.In-line fuseholder a type of enclosed fuseholder that is in line with the application wiring and ha

34、s two separable halves. Note: The fuse remains in the load side housing when the two halves are separated.Live parts conductive parts that are intended to operate at a potential different from that of the earth.Open-fuse indicator a means to indicate that a fuse has operated.Panel mount fuseholder a

35、 type of enclosed fuseholder that is mounted through a panel and includes a removable fuse carrier. Notes: (1) The carrier extends outside the panel and contains the fuse. (2) The housing is located behind the panel. (3) Line and load side terminals are located behind the panel. (4) The housing is s

36、ecured to the panel.Rating a designated limit on operating characteristics based on specified conditions, such as current, voltage, and frequency.Current rating the maximum ampere rating, based on specified conditions, that is assigned to a fuseholder.Note: Each fuseholder can accommodate a range of

37、 fuses based on its body size, such as 31 to 60 for a 60 A body size.Voltage rating the maximum voltage for which a fuseholder is designed.Rejection member a means to prevent the installation of any fuse other than that for which the fuseholder is intended.C22.2 No. 39-13 2013 CSA Group4 March 2013W

38、iring terminal a part of the fuseholder that provides a means to connect the conductors to the fuseholder.4 General requirementsGeneral requirements applicable to this Standard are given in CAN/CSA-C22.2 No. 0.5 Operating conditionsThe requirements of this Standard are based on fuseholders being use

39、d in a clean and dry environment under normal ambient temperature conditions. The manufacturer should be consulted if fuseholders are used under extreme conditions.6 Classification and characteristics6.1 Intended useThe fuseholders covered by this Standard are classified according to the fuse type i

40、ntended for installation in the fuseholder. Notes: (1) Refer to the class designation system specified in the CAN/CSA-C22.2No. 248 series of Standards and CSA C22.2 No.106.(2) For example, a Class C fuseholder is intended to accept a Class C fuse.6.2 Voltage and current ratingThe voltage and current

41、 rating of a fuseholder shall be equal to or greater than the rating for the fuse that it accepts.7 Construction7.1 ComponentsThe compound parts of a fuseholder shall comply with the applicable CSA Standard(s) as listed in Clause 2, except that it need not comply with requirements that(a)involve a f

42、eature or characteristic not needed in the application of the component in the product covered by this Standard; or(b) are superseded by a requirement in this Standard.7.2 Bases and supports Insulating material7.2.1Polymeric insulating materials shall have flammability ratings at least as high as th

43、e minimums specified in Table 1 and shall be subjected to the thermal strength test specified in Clause 7.3.3. The thermal strength test need not be performed on rigid thermosetting materials.7.2.2Porcelain, slate, marble, phenolic composition, and cold-moulded composition may support an uninsulated

44、 live part without complying with the requirements in Table 1 or the thermal strength test. Other materials may be used if suitably investigated and found acceptable for the purpose. 2013 CSA Group Fuseholder assembliesMarch 2013 5Table 1Minimum flammability ratings for insulating materials(See Clau

45、ses7.2.1 and 7.2.2.)7.2.3Bases shall have means for securely mounting the fuseholder assembly and preventing rotation there when installed as intended.7.2.4The insulating base of a fuseholder shall not be damaged when wire connectors or binding head screws securing conductors of rated ampacity are t

46、ightened to a torque that is 110% of the lesser of(a)the values specified in Tables D6 and D7 of the Canadian Electrical Code, PartI; or(b) the values specified by the manufacturer in Clause 9.1.6.Note: See Table2 for wire sizes.Test specified*Minimum flammability rating of materialV-0 V-1 V-2 HBHot

47、 wire ignition (HWI), ignition time in s 7 15 30 30High current arc ignition (HAI), number of arcs 15 30 30 60Comparative tracking index (CTI) under moist conditions*, V 175 175 175 175*See CAN/CSA-C22.2 No. 0.17 for specified test methods.Flammability shall be tested in accordance with CAN/CSA-C22.

48、2 No. 0.17.Material is in contact with or in close proximity to uninsulated live parts (within 0.8 mm (1/32 in).Material is in contact with or in close proximity to uninsulated live parts (within 0.8 mm (1/32 in) for nonarcing parts or 12.7 mm (1/2 in) for arcing parts).*Material surface is in conta

49、ct with or in close proximity (within 0.8 mm (1/32 in) to(a) uninsulated live parts of opposite polarity; or(b) uninsulated live parts; and(1) metal parts that can be grounded in service; or(2) any surface exposed to contact.A material having a minimum CTI of 100 may be used if the voltage involved is less than or equal to 250 V.Not appli