Porcelain surge arresters are available for applications up to 400kV systems.

Porcelain housing designs have been used by us for over 55 years.

From 1945 we produced porcelain surge arresters to the gapped silicone carbide pattern and since 1980 we have produced arresters to the gapless ZnO design.

The design consists of porcelain housing which conforms to IEC-815 with an Aero Dynamic shed profile.

The varistors, spacers and locating rings are assembled under compression with pressure relief diaphragms at either end. The air void is evacuated and replaced with dry air, then sealed.

Routine tests are carried out to show that the manufacturing conforms to the current International standard.

Electrical Performance

  Specification: IEC60099-4
  Classification: MAA Class 2 10kA/MBA Class 2 10kA/MCA Class 3 10kA/MDA Class 4 20kA
  High Current Performance: 100kA
  Pressure Relief: MAA 40 kA/MBA 25 kA/MCA** 65 kA/MDA** 65 kA
  Energy Capability: according to IEC60099-4 (Clause 8.4.2 table 5 and 8.5.5) MAA Class 2 5 kJ/kV at Ur/MBA Class 2 5 kJ/kV at Ur/MCA Class 3 8.75kJ/kV at Ur/MDA Class 4 10 kJ/kV at Ur
  Voltage Rating: MAA Rated Voltage from 3kV to 198kV//MBA Rated Voltage from 3kV to 156kV/MCA Rated Voltage from 3kV to 360kV/MDA Rated Voltage from 3kV to 360kV

Data Sheet