1、1994-09-14 . Tel.: (+32 2) 519 138 71 - Fax: +32 2) 519 69 19 I HO 586.2 Si September 1994 CE F LEC - Rue de Stassart 35 - B - 1050 Bruxelles Mineral insulated cables with a rated voltage not exceeding 750 V Part 2: Terminations SHEET INFORMATION Cibles i isolant minral, de tension assignee ne dpass
2、ant pas 750 V Partie 2: Extrmits Hineralisolierte Leitungen mit einer Nennspannung bis 750 V Teil 2: Endverschlusse Related to Directive: 73/23/EEC This Harmonization Oocument consists of the following: - Title Page - Text prepared by CENELEC Technical Cornittee TC 20 date of ratification : 1994-03-
3、08 date of announcement : 1994-10-01 date of withdrawal : 1995-04-01 date of latest publication : 1995-04-01 LIST OF NATIONAL STANDARDS, IF ANY, IS GIVEN OVERLEAF * HARMONIZATION DOCUMENT .DOCUflENT DHARMONISATION HARMONISIERUNGSDOKUflENT HD 586.2 S1 September 1994 UDC 621.315.687.3:621.315.2:621.31
4、5.613 Descriptors: Termination, electric cable, insulated cable, solid electric insulation, specification, dimension. test ENGLISH VERSION Mineral insulated cables with a rated voltage not exceeding 750 V Part 2: Terminations Cibles a isolant mineral, de tension assignee ne dpassant pas 750 V Partie
5、 2: Extrmits Mineralisolierte Leitungen mit einer Nennspannung bis 750 V Teil 2: Endverschlsse This Harmonization Document was approved by CENELEC on 1994-03-08. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Ha
6、rmonization Document on a national level. Up-to-date lists and bibliographical references concerning national implementation may be obtained on application to the Central Secretariat or to any CENELEC member. This Harmonization Document exists in three official versions (English, French, German 1. C
7、ENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardizati
8、on Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, 8-1050 Brussels 1994 Copyright reserved to CENELEC members Ref, No. HD 586.2 S1:1994 E = 3404583 0143b80 bb7 Page 2 HD 586.2 S1:1994 FOREWORD This Harmonizatio
9、n Document was prepared by CENELEC Technical Committee TC 20, Electric cables. It was submitted to the CENELEC Unique Acceptance Procedure (UAP) in May 1993 and was approved by CENELEC as HD 586.2 S1 on 1994-03-08. The following dates were fixed: - latest date of announcement of the HD at national l
10、evel (doa) 1994-10-01 - latest date of publication of a harmonized national standard (dop) 1995-04-01 - latest date of withdrawal of conflicting national standards (daw) 1995-04-01 For products which have complied with the relevant national standard before 1995-04-01, as shown by the manufacturer or
11、 by a certification body, this previous standard may continue to apply for production until 1996-04-01. This Part 2 of HD 586 is to be used in conjunction with HD 586.1 S1:1994. Page 3 HD 586.2 S1 :1994 CONTENTS 1. Scope 2. Definitions 2.1 Termination 2.2 Seal 2.3 Gland 3. Marking 3.1 Marking of pac
12、kages 3.2 Marking of seals and glands 4. Construction 4.1 Seals 4.2 Glands 5. Type tests 5.1 General 5.2 Seals 5.3 Glands 5.4 Electrical earth continuity test Page 4 4 4 4 4 4 5 5 3404583 0343682 43T Page 4 HD 586.2 S1:1994 1. ScoDe This standard specifies requirements for terminations for use with
13、mineral insulated cables complying with the requirements of CENELEC harmonised publication HD 586.1 . 2. Definitions The following definitions apply for the purpose of this standard. 2.1 Termination A complete end fitting for a mineral insulated cable, normally comprising a seal and a gland or a com
14、posite seal/gland device, but excluding the locknut and any associated junction box or accessory. 2.2 Seal The part of a termination designed to seal the end of the cable against entry of moisture. The design must be such as to provide insulation between conductors and between conductors and sheath
15、and provide conductor insulation external to the seal. It may also have a means of providing a protective conductor. 2.3 Gland The part of a termination designed to secure the cable in a cable entry. It may or may not be used to ensure earth continuity depending upon the type of construction and mat
16、erial used. 3. Markincl 3.1 Marking of packages Packages in which terminations or parts of terminations are supplied shall be marked with the following particulars if applicable. The manufacturer or supplier. The maximum and minimum operating temperature of the seals. A mark or means of identifying
17、the cables or cables for which it is intended. Whether a protective conductor is provided. Gland thread form and size. 3.2 Marking of seals and glands Seals and glands shall be marked with a mark or means of identifying the cable or cables for which they are intended. In addition, glands certified f
18、or use in hazardous areas shall be marked in accordance with EN50 O1 4, O1 5, O1 6, O1 7, O1 8, O1 9, 020. Page 5 HD 586.2 S1:1994 4. Construction 4.1 Seals 4.1 .1 A seal shall consist of a moisture resistant material contained if necessary within a suitable enclosure, and shall provide electrical i
19、nsulation for the cable conductors. 4.1.2 A protective conductor may be connected to a metallic sealing enclosure by any suitable method (e.g. welding, brazing, crimping or soldering) or it may be connected directly to the metal sheath by any suitable attachment (e.g. clip or clamp). The site of the
20、 protective conductor shall be in accordance with publication HD 384 and the attachment shall meet the electrical continuity test requirement specified in sub-clause 5.4. 4.1.3 A seal for use in potentially explosive atmospheres shall comply with the requirements of this standard and the appropriate
21、 requirements specified in EN50 014, 015, 016, 017, 018, 019, 020. 4.1.4 A seal or enclosure shall be made from material which will ensure freedom from corrosion arising from electrolytic action. 4.1.5 The sealing material used in the termination shall be such that the completed seal is capable of m
22、eeting the test requirements specified in clause 5. 4.1.6 Sleeving for conductor insulation shall be suitable for the range of operating temperatures stated for the seal by the manufacturer. 4.2 Glands 4.2.1 4.2.2 4.2.3 4.2.4 5. TvDe tests 5.1 General A gland may be of any suitable material providin
23、g that it ensures freedom from corrosion arising from electrolytic action and meets the test requirements specified in clause 5. The gland entry threads shall have a preferred thread form in accordance with those specified for conduit in IEC publication 423: Outside Diameters of Conduits for Electri
24、cal Installations and Threads for Conduits and Fittings. Other threads are permitted provided that the gland complies with all the other requirements of this standard. The length of gland entry threads shall be not less than 8mm. Glands for use in potentially explosive atmospheres shall comply with
25、the requirements of this standard and also the appropriate requirements specified in EN50 014, 015, 016, 017, 018, 019, 020. The tests in this standard are type tests intended to establish termination design characteristics. Unless otherwise specified all tests shall be carried out at an ambient tem
26、perature of 20 i 1 OOC. 3404583 0143684 202 = Page 6 HD 586.2 S1:1994 m The test voltage shall be either a.c. of approximately sinusoidal waveform at a frequency in the range 49Hz to 61Hz, or d.c. equal to the peak value of the alternating voltage, and shall be applied gradually. The seals and gland
27、s to be tested shall be fitted in accordance with the manufacturers recommendations to both ends of 300i50mm lengths of MI cable complying with Harmonised CENELEC publication HD 586.1 of a size and rated voltage appropriate to the seals/glands under test. Each seal shall be fitted as soon as possibl
28、e after the end of the cable has been prepared to minimise the ingress of moisture. New seals/glands shall be taken for each electrical and mechanical test. 5.2 Seals 5.2.1 5.2.2 5.2.3 5.2.4 Voltage test The sample shall withstand the following test voltage applied between each conductor and every o
29、ther conductor, and between each conductor and sheath, for five minutes. Seals for 500V rated cable - 2000V rms Seals for 750V rated cable - 2500V rms Insulation resistance test The insulation resistance measured with a d.c. voltage between 80V and 500V applied between the conductor, or conductors b
30、unched together, and the sheath shall be not less than 100 Mohms. Insulation integrity test This test shall be carried out in addition to the insulation resistance test after environmental tests specified in sub-clauses 5.2.4 and 5.2.5 as an indirect check that the insulation has not deteriorated. T
31、he insulation integrity test is a voltage test applied between each conductor and every other conductor and between each conductor and sheath. The voltage equal to the rated voltage of the cable shall be applied for five minutes. No insulation breakdown shall occur. Maximum operating temperature tes
32、t The sample shall be heated to a temperature at least 5K and not more than 10K higher than the maximum operating temperature specified by the manufacturer. At this temperature it shall pass the insulation integrity test specified in 5.2.3, and the insulation resistance measured with a d.c. voltage
33、between 80V and 500V applied between a conductor, or conductors bunched together, and the sheath shall be not less than 1 Mohm. 1 Nominal diameter of cable (mml Above Up to and including 6 6 9 9 = 3404583 O343685 349 M Proof Load (NI 35 70 1 O0 Page 7 HD 586.2 S1:1994 5.2.5 Temperature cycle test Th
34、e sample shall be heated to at least 5K and not more than 10K higher than the maximum operating temperature specified by the manufacturer and maintained at this temperature for 16ilh. Then it shall be transferred to a refrigerated compartment and maintained at the minimum operating temperature speci
35、fied by the manufacturer ( f 5k), for 8 i 1 h. This cycle shall be repeated 20 times. 5.2.6 Tensile test This test is applicable only to those seals which are intended to be used as a means of attachment of cables to supporting structures or enclosures. For the purpose of this test one seal may be f
36、itted to the cable sample. The assembly shall be tested in a suitable tensile testing machine in such a way that the load is applied without imparting any crushing force. The load shall be increased gradually to the proof value specified in Table I, and maintained at that value for 5s. After testing
37、 the seal shall show no splits or cracks or movement relative to the cable when examined with normal or corrected vision without magnification. TABLE 1 Proof Loads for Sealing Pots or Glands 5.3 Glands 5.3.1 Tensile test The gland shall be fitted to one end of a cable sample in accordance with the m
38、anufacturers recommendations. The entry thread on the body of the gland shall be screwed into an appropriate thread cut in a block of metal attached to one of the members of a suitable tensile testing machine. The load shall be increased gradually to the proof value in Table I and maintained at that
39、 value for 5s. After testing, the gland shall show no splits or cracks or movement relative to the cable when examined with normal or corrected vision without magnification. 3404583 0343686 085 Page 8 HD 586.2 si:i994 c 5.4 Electrical earth continuity test The samples, prepared as described in 5.4.1
40、 or 5.4.2, shall be heated in an oven to a temperature at least 5K and not more than 10K higher than the maximum temperature specified by the manufacture, and then allowed to return to room temperature. The electrical potential difference shall be measured as specified in 5.4.1 or 5.4.2 and recorded
41、. The initial potential difference shall not exceed 1 OmV. The temperature cycle and potential measurement shall be repeated until the variation in three successive voltage measurements is less than 2% or for 1 O cycles whichever is the greater. The final reading shall not be greater than the origin
42、al reading by more than 10%. 5.4.1 Glands and seals with integral protective conductors or other protective conductor attachments The test shall be carried out on an assembly incorporating two protective conductors and a sample of cable assembled in accordance with the manufacturers recommendations.
43、 Only those components concerned with electrical continuity need be incorporated, and all parts shall be in a clean new condition and shall not be adjusted during the test. A current of 25A d.c. or a.c. r.m.s. at a frequency of 49Hz to 61 “shall be passed between the free ends of the protective cond
44、uctors. The potential difference shall be measured at each end of the assembly between a point on the protective conductor not more than 1.5mm distant from the attachment and a point on the cable sheath not more than 1.5mm distant from the attachment. 5.4.2 Glands intended to provide earth continuit
45、y without integral protective conductors The test shall be carried out on an assembly incorporating two glands screwed into appropriate threads cut in two blocks of metal. A current of 25A d.c. or a.c. r.m.s. at a frequency of 49Hz to 61Hz shall be passed between the two blocks. The potential difference shall be measured at each end of the assembly between a point on the gland body and a point on the cable sheath no more than 1.5mm distant from the gland.
