HT XLPE

HT XLPE is a BIS type names (India) cable designation: HT = High tension (HT) XLPE cable of IS 7098-2, for 3.3 kV up to 33 kV, each core screened; SC = Semiconducting Layer And Screen Over Each Core; XLPE = Cross-linked polyethylene (XLPE) insulation; CU = Copper Tape Screen; ARM = Armour; PVC = PVC outer sheath; HT XLPE = HT XLPE: XLPE-insulated cable for 3.3 kV up to 33 kV, each core with a conductor screen, XLPE insulation, an insulation screen and copper tape; PVC fillers and inner sheath, steel round wire or flat strip armour, PVC outer sheath. Earthed 1.9/3.3, 3.8/6.6, 6.35/11, 12.7/22, 19/33 kV, unearthed 3.3/3.3 and 11/11 kV; 90 C normal, 250 C short circuit (BIS catalogue); RR Kabel sells 6.35/11 kV (E). IS 7098-2:2011.

2 coding systems recognise this code

BIS type names (India)

Symbol	Meaning
`HT`	High tension (HT) XLPE cable of IS 7098-2, for 3.3 kV up to 33 kV, each core screened
`SC`	Semiconducting Layer And Screen Over Each Core
`XLPE`	Cross-linked polyethylene (XLPE) insulation
`CU`	Copper Tape Screen
`ARM`	Armour
`PVC`	PVC outer sheath
`HT XLPE`	HT XLPE: XLPE-insulated cable for 3.3 kV up to 33 kV, each core with a conductor screen, XLPE insulation, an insulation screen and copper tape; PVC fillers and inner sheath, steel round wire or flat strip armour, PVC outer sheath. Earthed 1.9/3.3, 3.8/6.6, 6.35/11, 12.7/22, 19/33 kV, unearthed 3.3/3.3 and 11/11 kV; 90 C normal, 250 C short circuit (BIS catalogue); RR Kabel sells 6.35/11 kV (E). IS 7098-2:2011

China (GB / JB/T / MT cable model codes)

Symbol	Meaning
`H`	Communication Cable
`T`	Copper Conductor
`X`	Natural Or Styrene-Butadiene Rubber
`L`	Aluminium Conductor
`P`	Copper Screen As Braid
`E`	Low Smoke Zero Halogen Compound

How to read a China (GB / JB/T / MT cable model codes) cable code

Fire behaviour (EU CPR)

PVC sheath (PVC).
Typically targeted, as declared by makers for this kind of construction in the examples this site checked (not the class of this cable):
- Eca N1XV-R, Ahlsell (seller)
- Cca-s3,d1,a3 FG16OR16, Nexans (La Triveneta Cavi)
- Eca U1000 R2V, Nexans (La Triveneta Cavi)
- Eca N2XSY, Waskönig+Walter (10 kV datasheet)
Listed as sources, alphabetically by maker. No maker pays to appear here.

A CPR class is declared by the maker in its Declaration of Performance and printed on the sheath (EN 50575 cl 7). This decoder does not assign one. What the CPR classes mean →

Sources: EN 13501-6 draft and FprEN 50575:2014 final draft (drafts, not the published texts); IEC 60332-3-24:2000+A1:2008; EN 13501-3 draft A2.

HT XLPE as the cable designer builds it, 3x185 6.35/11 kV

Overall diameter 69.7 mm, about 11,430 kg/km. Nominal values from the standard's tables for this size, computed, not a maker's data.

Layer	Material	Thickness, mm	Over the layer, mm
Conductor screen (semicon)	Semiconducting	0.60	17.3
Insulation	XLPE	3.6	24.5
Insulation screen (semicon)	Semiconducting	0.80	26.1
Tape screen	Copper	0.20	26.5
Filler	PP		57.0
Inner covering / bedding	PVC	0.70	58.4
Wire armour	Steel	59 × 3.15	64.7
Sheath	PVC	2.5	69.7

HT XLPE on a drum

The smallest drum that passes every check, for 69.7 mm and about 11,430 kg/km as the cable designer builds it. Drums as their makers print them; lengths are estimates within a few per cent of the cable makers' own tables: whole layers, wound diameter 1.05 × OD, 73 mm freeboard under the flange rim.

Length	Drum size (its makers)	Layers	Gross weight
500 m	KTG 28 (2800 mm flange), wood KTG drums (Europe), Bayka, KTG	5 of 5	6,890–6,955 kg
1,000 m	No single drum in KTG drums (Europe) takes it: the drum calculator splits it over several.

Barrel at least 20 × OD = 1,395 mm for a cable of this kind (Medium voltage, multi-core): KTG table, the cable's datasheet wins. A load rating is the drum maker's own.

Other lengths, drums and weights: the cable drum calculator

Load it on a truck: 1000 m on its drum in the loading planner

Laying, sizes and datasheet: HT XLPE

HT XLPE belongs to the family Medium voltage cables: the lowest laying temperature, bending radius, pulling, depth, drum handling and the test after laying, every rule with its sources. Laying and handling guide: Medium voltage cables

Terms on this page: conductor screen · insulation screen · oversheath (outer sheath)

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