Rance of approval for miXticorв cables
Type approval for the complete range of multicore cables specified for this type is obtained by carrying out thg tests given In HD 405.1 and sub-clause 4,1,1 of HD 605 on a cable having copper conductors not exceeding 16mm’ and also on a caNe having aluminium conductors of 35mm* or larger.
Limited approval of 16mm* and below can be obtained by carrying out the tests given in sub-clause 4,1,1 of HD 605 on a cable having copper conductors not exceeding 16mm1. Limited approval for cables greater than 16mm1 can be obtained by carrying out the tests in sub-clause 4.1.1 of HD 605 on a cable having aluminium conductors of 35mm3 or larger.
The cable sizes selected for test shall be those which have the greatest ratio of sectional area in mm* of non-meiailic material to that of an the metallic components* Tests carried out on aluminium strip armour wiB also gain approval for aluminium wks armour and vice versa-Test requirements
The test shall be considered satisfactory it after burning has ceased, or the flames extinguished in accordance with sub-clause 4,1.1 of HD 605;
td Penetration to the conductor has been achieved on all the front row of cables № The cables have been wiped dean and the charred portion has not reached a height exceeding 2.5m above the bottom edge of the upper burner, measured at the front, rear and where applicable between the cable assembly. Inspection shall be made of the internal surfaces of closely packed cable installations to ensure that the damage does not exceed the limits specified.
2Ж6Л Oxygen index test
During type tests the absolute oxygen index of samples of insulation, bedding and oversheath, taken from the complete cable, shall be determined using the test method given in pr HD 405 3 (Appendix B}. The values obtained shaN be used to enable a nominal value together with statable tolerances for sample test to be agreed between manufacturer and purchaser.
For sample rests the value of oxygen index of the bedding and oversheeth shall be determined using the test method given in pr HD 405.3 (Appendix B). The values obtained shall fall withan the agreed tolerance on the nominal value.
Cables without metaIRc coverkm
Not applicable
Cables with metallic covering
Code designation
(Under consideration by TC20)
4 2 Rated vohaoo
0.6/1 OkV.
4.3 Construction
4-3 J Conductor
The conductors shad be of the material and type detailed in tables 4 to 14 and shaN comply with the requirements of HD 363:
□ass 1 for tokd conductors
□ess 2 for stranded conductors
Circular sectoral conductors are formed from four 90“ segments without any insulation between them. These shall comply with the material requirements of HD 383 and the resistance requirements of Tables 15 and 17.
Insulation
The insulation shall be either cross linked polyethylene 1XLPE) or hard ethylene propylene rubber (HEPRI complying with requirements given in Table 1.
The insulation thickness shal comply with the values specified in Tables 4 to 14.
Assembly of cores
The cores of cables having two, three or four cores shall be laid-up with > right-band or a right and left-hand alternating direction of lay. For multicore auxiliary control cables the direction of lay shall aft e mate for each successive layer.
For auxiliary control - cables having up to and including seven cores. It is permissible for cores to be laid-up with a right-hand or left-hand or with a right and left-hand alternating direction of lay.
Inner coverincL I bedding)
The bedding shall consist of an eluded layer of PVC type d compound comptying with the requirements in Table 2. The thickness shall comply with the values specified in Tables 4 to 14.
Armour
The armour shaM consist of a single layer of wires or strips having nominal dimensions as given in tables 4 to 14. as appropriate The armour shell be applied helically with a left hand lay for cables having up w and including four cores. For multi-согв auxiliary cables the armour shall be applied heli Сай у with a direction of lay opposite w that of the final layer of cores, except that for cables which have been laid up with alternating right end left-hand lay the armour may be appked with either a nghbhand or a left-hand lay.
For single core cables having stranded copper conductors the armour shall consist of aluminium wire. For single core cables having soM or sectoral or stranded aluminium conductors die armour shall consist of aluminium wire or strip.
For mufticore cable having solid aluminium conductors the armour shall consist of a single layer of akjmiruum wires or slops.
For multicore cables having copper conductors, the armour shall consist of I Single layer of steel wires.
Wire or £[гф armour shall comply with the following as appropriate-
tai The diameter of round armour wire shall fall within the minimum and maximum wire diameters specified m table 24 when measured in accordance with clause sub-clause 2.1 4.3 of HD 605.
(bl The mass of tine coatng of galvanised steel armour wire shall not be less than that given in table 25 whan measured in accordance with sub-clause 2.5.1.1 of HD 605.
(cl The wire shaM be subjected to the wrapping test specified in sub-clause 2 «3.2 of HD 605 and shaN not break.(d) The tensile strength of aluminium armour wires shal not be less than 125N/mm* when measured in accordance with subclause 2.3.1 J of HD 60S.
le) The thickness and width of individual strips of aluminium armour shall not differ from the vetoes specified in tables 6* 8. 10 or 12 of this section as appropriate, bv more then 10%. The method of measurement shall be in accordance with sub-clause 2.1.4.3 of HD 60S.
(fl The tensile strength of individual strips of aluminium armour shall not be less than 145N/'mm' when measured in accordance with sub-clause 2,3 J -1 of HD 605.
(ol The de resistance of the armour of the complete cable measured and corrected to 20&C shall not exceed the appropriate value given in tables 15 to 19 of this part when measured in accordance with sub-clause 3.1.2 of HD 605,
Joints in steel armour wire shall be brazed or welded and any surface irregularity shall be removed
Joints in aluminium wires or strip shall be made by cold pressure or fusion welding and all surface irregularities shall be removed.
Any joint in any wire or strip shall not be less than 1m from the nearest joint in any other armour wire in the complete cable.
4.3.6 Over ahead]
The overaheath shall be an extruded layer of black PVC compound Type 9 complying with the requirements given m Table 2
The overaheath thickness shall comply with the specified value in Tables 4 to 14.
The oversheath for single core cables shall have a suitable semi-conducting coating to enable the integrity of the oversheath to be determined after the cable has been installed in air.
The coating «han be capable of withstanding the rigours of instalation and shall adhere to the surface of the sheath when tne cable is operating at maximum conductor temperature,
4-4 Tests
Compliance with the requirements of sub-clause 4.3 shall be checked by inspection and by the tests specified in Table 3
.HD 604 SI Л 994
Fart 4 Section E
ТАНЕ 1
Requkernenta for the л on-electrical teats for 90°C insulation
|
1 |
2 |
3 |
4 |
1 * |
• |
|
Ref Ne |
Tert |
Unit |
Type of compound |
Tert method described |
|
|
|
|
|
H6PR |
XLPE |
m |
|
1 |
Tenrie lire with and atonoatten rt break, |
|
|
|
Н0Б05-1Л Sijbcbuae 9.1 |
|
1.1 |
Properties n me state as <tekvered |
|
|
|
|
|
1,1.1 |
Vakm to be obtained lor the teneite ettengl*: - median, min |
N/mm12 |
C.S |
12S |
|
|
1.1,2 |
Vatae to be obtamod for cbe rtongation at creek - madwi. mm |
% |
200 |
200 |
|
|
12 1.2Л |
^opvtwe afier ageing in ar oven Aoetrtg condition*: ' temper a ftre • dwetten of treatment |
"C h |
ІЗ&УЗ 7x24 |
13Б±3 7x24 |
НО506Л.2 Sub oIbum I.L3 |
|
1.2.2 |
Values to be obtained lor the ittrrahe strength: • madten. mln - varieton [1| max |
N/rwn1 % |
30 |
25 |
|
|
1.2 3 |
Vsfuee to be obtained tor ihe elongation at break: • medten, mm - varieten (11 max |
% % |
30 |
25 |
|
|
1.3 |
(«parei |
|
|
|
|
|
14 |
Properties after ageing Г* the air bomb |
|
|
|
HDBO5.L2 Sdb-cteuao 9.2 |
|
14.1 |
Ageing conditions: ’ tamparehre - duration of treatment |
•c h |
12741 40 |
% |
|
|
14.2 |
Vote* to be obtained for the tensile evength; • median, rmn - variation 111 max |
NAnm’ 4 |
30 |
■ |
|
|
143 |
Values to be obtained lor rhe etongetion at Ьгмк; - media*. mm ‘ vertetion |11 max |
ZZ |
30 |
* * |
|
TABLE 1 (concluded)
|
1 |
2 |
3 |
|
» |
3 |
|
|
Ref No |
Teet |
UnU |
Type of compourtd |
Test method described in |
||
|
MEFR |
XLPE |
|||||
|
2 |
Hot Mt tael |
|
|
|
HOBOS 2 Л Сімме 9 |
|
|
2.1 |
Condrtioric of tnetmenti - temp «sture - time under fold - mechanical airew |
•c min H/cm1 |
250*3 1Б 20 |
20012 15 20 |
|
|
|
2.2 |
Teal requirements ' max eiongation undw load - max efonqritQo «tier unfolding |
% % |
1OQ 2Б |
ne 16 |
|
|
|
3 |
(Specs) |
|
|
|
|
|
|
4 |
Ozone Founts tee' |
|
|
|
ND5O5.2.1 Clause 8 |
|
|
|
Tsais condMsmvi
|
*C h Ppm |
ЗБ±2 30 2БОЗОО |
- |
|
|
|
S |
SlYHkaos test |
|
|
|
НОБОБ.1.Э CkMrts 10 |
|
|
5 2 |
Tael corxfiiions - '«прогните • lime |
•c h |
-r |
13013 1 |
|
|
|
63 |
Reeult tp be obtumnj - shrinkear, meat |
% |
- |
4 |
|
|
|
6 |
ЦжШіЕІІ Minimum |
IRMO |
де |
r |
MD 60Б Sub-clause 3-ї a |
|
|
7 |
Wflier AbaorpLlon |
|
|
|
МО6ОБ.1.3 Сінне 3.2 |
|
|
7,1 |
Тем condtltone tempars'ure - time |
•c h |
SB±2 14k 24 |
4b±2 14*24 |
|
|
|
7.2 |
Raeuk to be ebteined - max varfoikm on mass |
mgfcm* |
5 |
1 |
|
|
Requirements for the non-electrical tests for polyvinyl chloride type 9 compound
|
1 |
2 |
3 |
4 |
6 |
|
|
T«4t |
unh |
Type » PVC |
Teat Method |
|
1 |
Tennle wrteJih К ikjnoatxjn at |
|
|
HDfiDfi.1.1 Sub-diuee ft.2 |
|
|
|
|
|
|
|
1.1 |
Prcpactiee in the »tei a ar detoered |
|
|
|
|
1,1.1 |
Value» to be obtained lor the tonrilo strength; - median, min |
N/nwn* |
12,6 |
|
|
Ш |
Valuee to ba obtained lot elongeiion ai break: - median, min |
|
160 |
|
|
1.2 1Л.1 |
Properties ahar agoing tn ar oven Agoing condflione: letnperature - duraiion of treatment |
•c h |
10012 7x24 |
ИО5О6.1,2 Sub-сіаым 0)3 |
|
E2.2 |
Value to be abieinad for th* tonbie rlfeooth: - median, min - warjaiiOH *, max |
N/nwn' % |
12.6 26 |
|
|
1.2.3 |
Value to bo obtained for the elongation al break: - median, min - халмюп *, max |
% % |
150 26 |
|
|
2 |
Loaa of там ton |
|
|
МЯЇ06.Х2 Sub clMM ft |
|
2Л |
Ageing condition* - temperature ' duration of treatment |
•c h |
10012 7x24 |
|
|
2.2 |
Value to be corained for the lot* of meet, max |
m^cm1 |
1.6 |
|
|
2 |
(Sparel |
|
|
|
Variation: Difference between the median value after ageing and the median value without
