MV Surge Arresters

2SS15N – R

Metal oxide medium voltage surge arrester with silicone rubber housing. IEC Class 1. Uc 3–40.5 kV, Ur 3.75–50.6 kV, In 10 kA, IP 67. Twenty-three voltage/size levels.

2SS15N – R

2SS15N-R is a metal oxide surge arrester providing protection against overvoltages and transient events in medium voltage networks up to 52 kV.

The varistor block is directly molded with silicone rubber. This method prevents moisture ingress and provides rigidity to the housing.

The product is certified as Class 1 according to IEC 60099-4:2004 and IEC 60099-5 standards.

It is produced in R housing form — skirted silicone housing, Ø120 mm base.

Suitable for indoor and outdoor installation.

HIGHLIGHTED FEATURES

  • IEC Class 1 arrester
  • Varistor directly molded with silicone rubber
  • IP 67 protection class
  • UV and chemical resistant, self-cleaning silicone surface
  • −60 °C … +85 °C operating range
  • Low residual voltage
  • Rigid housing construction
  • Residual voltage values are provided for seven different impulse currents — detailed coordination calculation can be performed
  • 100% final inspection in the manufacturer's laboratory
  • Each arrester is marked with an indelible measurement number

GENERAL TECHNICAL DATA

Body diameterØ70 mm
Parameter Value
Arrester type 2SS15N
Commercial designation (housing form) R
IEC class 1
Standard IEC 60099-4:2004, IEC 60099-5
Continuous operating voltage (Uc) 3 – 40.5 kV
Rated voltage (Ur) 3.75 – 50.6 kV
Nominal discharge current (In, 8/20 µs) 10 kA
High impulse current (4/10 µs) 100 kA
Short-circuit current (Isc) 20 kA
Long-duration current (I2ms) 250 A
Energy absorption capacity (long-duration, W2ms) 2.8 kJ/kV·Uc
Energy absorption capacity (impulse, W4/10) 4.8 kJ/kV·Uc
Cantilever strength (24 kV) 300 Nm
Cantilever strength (36 kV) 250 Nm
Vertical load (Fv) 625 N
Terminal tightening torque (Ur = 45 kV) 80 Nm
Protection class IP 67
Ambient temperature −60 °C … +85 °C
Body material Silicone rubber
Body color Grey
Connection thread M12 × 27 mm
Upper terminal M12 × 25
Bottom terminal M12 × 20
Base diameter Ø120 mm

VOLTAGE LEVELS — ELECTRICAL

Ur [kV] Uc [kV] 1/20 µs 5 kA 1/20 µs 10 kA 8/20 µs 5 kA 8/20 µs 10 kA 8/20 µs 20 kA 30/60 µs 125 A 30/60 µs 500 A Upeak 1.2/50 µs Urms 50 Hz 1 min
3,75 3 8,55 9,65 7,18 8,78 9,60 7,35 7,85 62 25
5,00 4 12,80 14,20 11,25 12,92 14,15 9,63 10,16 62 25
7,50 6 21,35 23,85 17,95 21,70 23,75 16,98 18,01 62 25
10,00 8 25,60 28,40 26,12 25,84 28,30 19,26 20,32 98 35
12,50 10 34,15 38,05 29,00 34,62 37,90 26,61 28,17 98 35
15,00 12 38,40 42,60 33,15 38,96 42,45 28,89 30,48 98 35
17,50 14 46,95 52,25 39,98 47,54 52,05 36,24 38,33 125 55
20,00 16 51,20 56,80 44,10 51,68 56,60 38,52 40,64 125 55
22,50 18 59,75 66,45 51,26 60,46 66,20 45,87 48,49 125 55
25,00 20 64,00 71,00 55,45 64,60 70,75 48,15 50,80 135 60
26,25 21 67,55 77,10 58,93 67,95 76,25 52,15 54,55 135 60
27,50 22 72,55 80,65 63,00 73,38 80,35 55,50 58,65 135 60
30.00 ⁽¹⁾ 24 76,80 85,20 66,15 75,98 84,90 57,78 60,96 135 60
30.00 ⁽²⁾ 24 76,80 85,20 66,15 75,95 84,90 57,78 60,96 150 65
32,50 26 85,35 94,85 77,20 84,76 94,50 65,13 68,81 150 65
35,00 28 89,60 99,40 84,90 88,21 99,05 67,41 71,12 150 65
37,50 30 98,15 109,05 88,00 96,99 108,65 74,76 78,97 170 70
40,00 32 102,40 113,60 96,05 101,15 113,20 77,04 81,28 170 70
43,75 35 112,30 125,50 97,86 112,81 125,15 85,16 90,12 170 70
45.00 ⁽¹⁾ 36 115,20 127,80 99,10 114,10 127,25 86,67 91,44 170 70
42,50 34 110,95 123,25 96,05 109,93 122,80 84,39 89,13 180 75
45.00 ⁽²⁾ 36 115,20 127,80 99,10 114,10 127,35 86,67 91,44 180 75
50,60 40,5 125,76 136,35 114,89 129,78 146,25 96,12 101,35 180 75

Ures values are in kV.

VOLTAGE LEVELS — MECHANICAL

Ur [kV] AD [mm] CD [mm] A [mm] B [mm] H [mm] N
3,75 139 360 60 90 147 3
5,00 139 360 80 100 147 3
7,50 139 360 100 120 147 3
10,00 185 520 120 140 193 5
12,50 185 520 140 160 193 5
15,00 185 520 160 180 193 5
17,50 235 600 180 200 243 6
20,00 235 600 200 220 243 6
22,50 235 600 220 240 243 6
25,00 262 680 240 260 270 7
26,25 262 680 260 280 270 7
27,50 262 680 270 300 270 7
30.00 ⁽¹⁾ 262 680 320 320 270 7
30.00 ⁽²⁾ 309 760 320 320 317 8
32,50 309 760 340 340 317 8
35,00 309 760 360 360 317 8
37,50 362 1000 295 ⚠️ 380 370 11
40,00 362 1000 380 400 370 11
43,75 362 1000 410 430 370 11
45.00 ⁽¹⁾ 362 1000 420 440 370 11
42,50 396 1080 400 420 404 12
45.00 ⁽²⁾ 396 1080 420 440 404 12
50,60 396 1080 450 470 404 12
  • Indoor and outdoor installation
  • Protection of electrical equipment
  • Protection of compensation devices
  • MV distribution networks (up to 52 kV)
  • Substations and distribution panels
  • Railways
  • Mines
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