Porcelain

Since 1962 we manufacture our reliable porcelain arresters of the SB series.

Metaloxide varistors with high energy absorption capability and an excellent sealing system ensure a long service life. Depending on the mechanical requirements our SB arresters are available in 3 design types/sizes:

  • size 0 – max. service load 10 kNm
  • size I  – max. service load 23 kNm
  • size II – max. service load 35 kNm

Our Products

Technical Data

Product   SB size 0 SB size I SB size II
Highest System Voltage Us kV 420 550 800
max. Rated Voltage Ur kV 396 468 612
max. Nominal Discharge Current In (at 8/20 µs waveshape) kA 20 20 20
max. Thermal Energy Absorption Capability kJ per kV of Ur   13 13 13
max. Line Discharge Class   5 5 5
Qrs (accord. IEC 60099-4 Edt. 3.0)   3,6 3,6 4,0
High Current Withstand Strength 4/10 µs kA 100 100 100
max. Low Current Withstand Strength 2 ms A 2.000 2.000 2.000
max. Short Circuit / Pressure Relief Capability kA - 0,2s   65 63 63
Mechanical Strength: Specific short-term load SSL Nm 10.000 23.000 35.000

References

  • 550 kV S/S Rincón Santamaria, Intesar/CFEE Transener, Argentina
  • 420 kV S/S Damavant, Iran - desert climate
  • 420 kV Damman Area, Saudia Arabia - very harsh environment, 40 mm/kV creepage distance
  • 765 kV EDELCA, Venezuela
  • 550 kV Transelec, Chile - severe seismic conditions
  • 550 kV EGAT, Thailand