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WSPSA1 – Surge Arrester 42kV

An image of the Wallis WSPSA1 & WSPSA5

WSPSA1 Datasheet (Click here to open)

The WSPSA1 Surge Arrester 42kV Ur, 33.6kV Uc, Polymeric Surge Arrester features and benefits:

  • Metal Oxide Arrester (ZnO).
  • Polymeric Housing.
  • Outdoor Application.
  • IEC 60099-4:2014.
  • Nominal Discharge Current: 10kA.
  • Designation Class SL.
  • Charge Current Rate (Qrs): 1.6C (Impulse).
  • High Current Impulse 4/10 µs: 100kA.
  • Energy Capability (Wth): 6.7 kJ/kV at Ur (Thermal).
  • These arresters meet the requirements of ENA G78 Issue 4 for use as SA1 (Suitable for sites with a 50Hz ROP <33kV. Support insulators must have an impulse withstand voltage of >133kV. See ENA Engineering recommendation G78, Issue 4, § for details).
Rated Voltage (Ur)Continuous Operating Voltage (Uc)TOV Capability (With prior energy), 1s (Tc)TOV Capability (With prior energy), 10s (Tc)Rated Short Circuit CurrentDry Impulse Voltage, 1,2/50 µsWet Power Frequency VoltageFlashover DistanceCreepage LengthMinimum Distance Between Phase CentresMinimum Distance Between Phase to EarthHeightPart Number
Rated Voltage (Ur)42 kVContinuous Operating Voltage (Uc)33.6 kVTOV Capability (With prior energy), 1s (Tc)47.8 kVTOV Capability (With prior energy), 10s (Tc)45.7 kVRated Short Circuit Current65 kADry Impulse Voltage, 1,2/50 µs321 kVWet Power Frequency Voltage122 kVFlashover Distance461mmCreepage Length1340mmMinimum Distance Between Phase Centres348mmMinimum Distance Between Phase to Earth270mmHeight449mmPart NumberWSPSA1


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