Medium Voltage 6kv Cables to VDE 0276 Single Core N2xsey 95 Mm

Medium Voltage 6kv  Cables to VDE 0276 single core N2XSEY  95 mm


Application
The single core cables are designed for distribution of electrical power with nominal voltage Uo/U ranging from 3.8/6.6KV to 19/33KV and frequency 50Hz. They are suitable for installation mostly in power supply stations, indoors and in cable ducts, outdoors, underground and in water as well as for installation on cable trays for industries, switchboards and power stations.
Standards
DIN VDE 0276 Part 620 -622
HD 620 S1
Conductor: Stranded compacted circular copper or aluminium conductors according to IEC
60228 class 2 / VDE 0276 class 2 / VDE 0295 HD 383. All internal interstices of the conductor are filled with water blocking compound to prevent ingress of water through conductor during storage, handing, installation and operation of the cable.
Conductor Screen: The conductor screen consists of an extruded layer of non metallic, semi-conducting compound firmly bonded to the insulation to exclude all air voids. The screen has a minimum thickness of 0.3mm and the maximum volume resistivity of 500 Ohm-m at
90°C.
Insulation: Insulation is of extruded XLPE compound type 2XI1 according to DIN VDE 0207 part 22 and HD 620.1 with high degree of cross-linking, free from contaminants, air voids and heat resistant by dry cured process.
The nominal insulation wall thickness is shown in table 1.
Table 1. Insulation Thickness
Nom. Cross
Section Area
Insulation Thickness at Nom. Voltage
3.6/6KV
(Um=7.2kV)
6/10kV
(Um=12kV)
8.7/15kV
(Um=17.5kV)
12/20kV
(Um=24kV)
18/30kv
(Um=36kV)
mm²
mm
mm
mm
mm
mm
35
2.5
3.4
4.5
5.5
-
50
2.5
3.4
4.5
5.5
8.0
70
2.5
3.4
4.5
5.5
8.0
95
2.5
3.4
4.5
5.5
8.0
120
2.5
3.4
4.5
5.5
8.0
150
2.5
3.4
4.5
5.5
8.0
185
2.5
3.4
4.5
5.5
8.0
240
2.6
3.4
4.5
5.5
8.0
300
2.8
3.4
4.5
5.5
8.0
400
3.0
3.4
4.5
5.5
8.0
Insulation Screen: The insulation screen consists of extruded non metallic, semi-conducting compound extruded over the insulation. The extruded semi-conducting layer shall consist of bonded or cold strippable semi-conducting compound capable of removal for jointing or terminating.The minimum thickness is 0.3mm and the maximum volume resistivity of 500
Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can
be easily hand stripped on site.
Conducting Water Blocking Layer: The insulation screen may be coverd by semi- conductive water blocking tape which will swell up under the influence of moisture of water to ensure longitudinal watertightness.
Metallic Screen: Copper wires are applied over the conducting water blocking layer with a minimum diameter of 0.5mm. And over the copper wires, copper tape with minimum thickness of 0.1mm is applied helically with overlap. Total cross section of metallic screen layer is shown in table 2. The screen can withstand fault current to earth of 1000 A for one second at maximum temperature of 160°C. Minimum cross section of concentric conductor is according to DIN VDE 0273 & 0276 as shown.
Table 2. Minimum Total Cross Section of Metallic Screen
Nominal Cross-Section Area
Of Cable
Minimum Cross-Section of Metallic Screen
DC Resistance of the Copper Wire Screen
mm²
mm²
mm
Up to 120
16
1.06
150-300
25
0.72
400-630
35
0.51
800-1000
50
0.35
Separator / Water Blocking Layer: The metallic screen may be covered by non-conducting water blocking tape which will swell up under the influence of moisture of water to ensure longitudinal watertightness.
Separation Sheath (for armoured cable): The separation sheath comprises a layer of extruded PVC, PE or LSZH, applied under the armour. Thickness of separation sheath as shown in table 3.
Table 3. Separation Sheath Thickness
Core Diameter
Approx.Thickess of Inner Sheath
mm
mm
>
<

35
45
1.4
45
60
1.6
60
80
1.8
80
-
2.0
Armour (for armoured cable): The armour consists of round aluminium wire armour applied helically over an extruded separation sheath.
Table 4. Round Armour Wire Diameter
Fictitious Diameter Under the Armour
Armour Wire Diameter
mm
mm
>
<

-
10
0.8
10
15
1.25
15
25
1.6
25
35
2.0
35
60
2.5
60
-
3.15
Outer Sheath: Overall sheath comprises a layer of extruded PE compound DMP2 according to HD620.1 and 2YM3 type to DIN VDE 0276 Part 3, or PVC compound DMV6 according to HD620.1 and YM5 to DIN VDE 0276 Part 6. Normal wall thickness is 2.5mm (1/500mm
18/30sq 2.6mm), suitable for exposure to sun-light or other local atmospheric environments and for the operating temperature of the cable.
PHYSICAL PROPERTIES:
Operating Temperature: up to 90°C
Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds)
Bending Radius: 15 x OD (Cable without metal sheath)
30 x OD (Cable with aluminium sheath)
Table 5. Nominal /Operating /Testing Voltages
Nominal Voltage Uo/U
Operating Voltage (max)
Testing Voltage
3.6/6KV
8KV
10KV
6/10KV
12KV
15KV
8.7/15KV
18KV
22.5KV
12/20KV
24KV
30KV
18/30KV
36KV
45KV
TYPE CODES:
Cores
N         According to VDE Standard (No abbreviation for copper conductor) A           Aluminium Conductor
2X      XLPE Insulation
Y        PVC Insulation
Screen
S        Screen of copper wires and copper tape, helically wound.
SE      Screen of copper wire plus copper tape over each individual cores, helically wound
(F)      Longitudinally waterproof screen.
Concentric Conductor Screen
C        Concentric conductor screen of copper wires and copper tape, helically wound.
CE     Concentric conductor screen of copper wire plus copper tape over each individual cores, helically wound.
Jacket
2Y      PE Jacket
Y        PVC Jacket
H        LSZH Jacket
Single Core 1.8/3KV (Um=3.6KV) Dimensional Data
Nom. Cross- Section Area

Nom. Insulation Thickness

Copper Tape Thickness
Copper Wire Screen Area*

Nom. Sheath Thickness

Nom. Overall Diameter
Approx. Weight
N2XSY/ N2XSH Cu
NA2XSY/ NA2XSH Al

N2XS2Y Cu

NA2XS2Y Al

N2XS (F) 2Y Cu
NA2XS (F)
2Y Al
mm²
mm
mm
mm²
mm
mm
kg / km
kg / km
kg / km
kg / km
kg / km
kg / km
25
2.0
0.1
16
1.4
13
500
180
480
140
500
230
35
2.0
0.1
16
1.4
14
620
280
600
240
620
330
50
2.0
0.1
16
1.4
15
700
380
750
290
750
430
70
2.0
0.1
16
1.5
17
900
480
800
380
1000
560
95
2.0
0.1
16
1.5
19
1200
590
1050
460
1300
670
120
2.0
0.1
16
1.6
21
1450
700
1300
550
1500
800
150
2.0
0.1
25
1.6
22
1700
800
1550
650
1800
900
185
2.0
0.1
25
1.7
24
2050
850
1900
750
2150
950
240
2.0
0.1
25
1.8
27
2550
1050
2350
900
2650
1150
300
2.0
0.1
25
1.8
29
3150
1250
2950
1050
3250
1350
400
2.0
0.1
35
1.9
32
3950
1550
3800
1450
4100
1650
500
2.2
0.1
35
2.0
35
5000
2000
4800
1800
5200
2150
630
2.4
0.1
35
2.2
38
6200
2200
6300
2100
6400
2350
800
2.6
0.1
35
2.3
44
8000
2900
7900
2800
8200
3050
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as standard.
Electrical Data
Nom.
Cross-
Section
Area
D C Resistance
CU / AL
A C Resistance
CU / AL
Short Circuit Rating of
Conductor
CU / AL
1 sec
Capaci-
tance
Charging Current
Short Circuit Rating of Copper Wire Screen
1 sec
Short Circuit Rating of Copper Tape Screen
1 sec
Reactance
Inductance
Impedance
Trefoil
Flat Spaced
Trefoil
Flat Spaced
Trefoil
Flat Spaced
cu
AL
cu
AL
mm2
µΩ/m
µΩm
kA
pF/m
mA/m
kA
kA
µΩ/m
nH/m
µΩ/ m
µΩ/ m
25
727/1200
929/1538
3.6/2.3
222
0.32
2.6
0.3
131
185
345
535
936
1544
952
1554
35
524/868
668/1113
5.0/3.2
251
0.35
2.6
0.4
122
178
327
524
679
1121
695
1131
50
387/641
494/822
6.8/4.4
281
0.39
2.6
0.4
116
172
313
514
511
834
527
844
70
268/443
343/568
9.8/6.3
341
0.45
2.6
0.5
110
165
300
495
364
583
386
597
95
193/320
248/410
13.3/8.5
397
0.50
2.6
0.5
104
160
287
485
272
427
300
446
120
153/253
196/325
17.2/11.0
430
0.55
2.6
0.6
104
159
280
475
225
345
257
367
150
124/206
159/265
21.2/13.5
464
0.59
4.3
0.6
100
156
274
465
193
287
229
313
185
99.1/164
128/211
26.6/17.0
513
0.65
4.3
0.7
98
154
267
459
165
237
206
267
240
75.4/125
98/161
34.9/22.3
573
0.70
4.3
0.9
94
150
260
455
140
191
185
226
300
60.1/100
80/130
43.8/28.0
652
0.72
4.3
1.0
91
147
253
445
128
163
174
203
400
47.0/77.8
64/102
57.3/36.6
727
0.75
5.8
1.1
90
147
248
435
113
141
164
184
500
36.6/60.5
51/81
72.3/46.2
754
0.79
5.8
1.2
89
145
245
425
105
124
158
171
630
28.3/46.9
42/64
91.2/58.3
786
0.87
5.8
1.3
86
143
243
415
97
110
151
160
SIngle Core 3.6/6KV (Um=7.2 KV)
Single Core 6/10KV (Um=12 KV)
Singke Core 8.7/15KV (Um=17.5KV)
Single Core 12/20KV (Um=24KV)  
Single Core 18/30KV (Um=36KV)
Current Rating for Single Core 1.8/3KV(Um=3.6KV ) to 18/30KV(Um=36KV)
Current Rating Conditions:
Ground Temperature: 20°C Ambient Temperature (air): 30°C Depth of Soil: 0.8m
Thermal Resistance of Soil: 1.5Km/W


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