Enco Group

1. Central filling from a bundle

for cables with the index "ng" — from low-flammability polyvinyl chloride plastic compound;
for cables with the index "ng-LS" — from low-flammability polyvinyl chloride plastic compound;
for cables with the index "ng-HF" — from a halogen-free polymer composition;
for all other cables — from a chalk-filled unvulcanized rubber compound or polyvinyl chloride plastic compound.

2. Round multi-wire compacted conductive core

material: aluminum (A), copper;
cross-section: 35–300 sq. mm.

3. Screen along the core

From extruded peroxide-crosslinkable polyethylene composition.

4. Insulation

Made of peroxide-crosslinked polyethylene (PV).

5. Screen over insulation

Made of extruded peroxide-crosslinked polyethylene composition.

6. Separating layer

for cables without index "g" — made of conductive paper tape or conductive polymer tape, or non-woven fabric;
for cables with index "g" — made of conductive water-blocking tape with overlap.

7. Screen made of copper wires

with a cross-section of at least 16 sq. mm for cables with a core cross-section of 35–120 sq. mm;
with a cross-section of at least 25 sq. mm for cables with a core cross-section of 150–300 sq. mm;
with a cross-section of at least 35 sq. mm for cables with a core cross-section above 300 sq. mm.

Note. The screen cross-section is selected depending on the short-circuit currents, which must be calculated according to the conditions of laying the cable line. It is possible to manufacture a cable with an increased screen cross-section.

8. Interphase filling with filling between phases:

for cables with the index "ng" - from low-flammability polyvinyl chloride plastic compound;
for cables with the index "ng-LS" - from low-flammability polyvinyl chloride plastic compound;
for cables with the index "ng-HF" - from a halogen-free polymer composition;
for all other cables from chalk-filled unvulcanized rubber compound or polyvinyl chloride plastic compound.

9. Inner sheath for armoured cables

with a protective hose made of polyethylene — made of chalk-filled unvulcanised rubber compound or polyvinyl chloride plastic compound or polyethylene;
with the index "ng" — made of low-flammability polyvinyl chloride plastic compound;
with the index "ng-LS" — made of low-flammability polyvinyl chloride plastic compound;
with the index "ng-HF" — made of a halogen-free polymer composition;
for all other grades — made of chalk-filled unvulcanised rubber compound or polyvinyl chloride plastic compound.

10. Armour

Made of galvanised steel tapes (B) or galvanised steel wires (K), aluminium wires or aluminium alloy wires (Ka).

11. Separating layer

Made of aluminum-polymer tape (for grades with indexes "2g" "u2g".

12. Sheath

for cables with index "P" — made of polyethylene;
for cables with index "Pu" — made of polyethylene with increased thickness;
for cables with index "V" — made of PVC plastic compound;
for cables with index "ng" — made of low-flammability polyvinyl chloride plastic compound;
for cables with index "ng-LS" — made of low-flammability polyvinyl chloride plastic compound;
for cables with index "ng-HF" — made of halogen-free polymer composition.
Application

Application

For laying in the ground (in trenches) regardless of the degree of soil corrosion activity, subject to protection from mechanical damage. Fire hazard class according to GOST 31565-2012 02.8.2.5.4.

Cables with cross-linked polyethylene insulation are intended for transmission and distribution of electric energy in stationary installations at a nominal alternating voltage of 6, 10, 15, 20 and 35 kV with a nominal frequency of 50 Hz for networks with grounded and isolated neutral.

Design features

Section, sq.mm	Wire resistance, no more than Ohm/km		Wire resistance, no more than Ohm/km					Weight of 1 km of single-core cable, kg
	Wire resistance, no more than Ohm/km		Wire resistance, no more than Ohm/km					6 кV		10 кV		15 кV		20 кV		35 кV
	Al	Cu	6 кV	10 кV	15 кV	20 кV	35 кV	Al	Cu	Al	Cu	Al	Cu	Al	Cu	Al	Cu
3×35(16)	0,868	0,524	43,1	49,9	52,6	58,1	72,8	2062	2710	2348	2990	3088	3736	3722	4370	5637	6285
3×50(16)	0,641	0,387	46,3	52,5	56,6	60,9	75,6	2384	3263	2645	3562	3609	4488	4111	4990	6111	6989
3×70(16)	0,443	0,268	49,5	56,6	60,3	64,6	79,3	2782	4035	3101	4383	4130	5383	4665	5918	6773	8026
3×95(16)	0,320	0,193	53,1	60,6	63,9	68,8	82,3	3274	5015	3624	5365	4716	6457	5333	7074	7408	9149
3×120(16)	0,253	0,153	57,1	63,2	67,5	72,4	85,3	3852	6051	4024	6223	5285	7484	6006	8205	8040	10239
3×150(25)	0,206	0,124	60,8	66,7	71,8	75,6	88,5	4492	7239	4632	7381	6143	8890	6725	9473	8845	11592
3×185(25)	0,164	0,099	64,0	70,9	73,8	80,8	94,1	5059	8449	5304	8695	6662	10052	7592	10983	9933	13323
3×240(25)	0,125	0,075	70,4	75,9	79,2	85,9	-	6192	10643	6176	10574	7759	12210	8727	13177	-	-

Technical specifications

Operating temperature range

from -60°C to +50°C (PE sheath)

from -50°C to +50°C (PVC sheath)

Relative air humidity

at temperatures up to 35°C up to 98%

Laying and installation of cables without preheating is carried out at a temperature not lower than

-20 °C (PE sheath)

-15 °C (PVC sheath)

Minimum bending radius during installation

for single-core cables — 10 outer diameters

Nominal frequency

50 Hz

Test alternating voltage with a frequency of 50 Hz

for voltage 6 kV — 12.6 kV

for voltage 10 kV — 21 kV

for voltage 15 kV — 30.5 kV

for voltage 20 kV — 42 kV

for voltage 30 kV — 63 kV

for voltage 35 kV — 72.8 kV

Long-term permissible heating temperature of cable cores during operation

+90 °C

Warranty period of operation — 5 years

Service life — 30 years