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  • Series
  • Model
  • Brand / Made in
  • Isolating spark gap
  • Indoor application
  • Max. discharge current Imax: 70 kA
  • Impulse current Iimp: 25 kA
  • Rated impulse sparkover voltage 1kV/μs: 1500 V
  • EN 50164-3, IEC 62561-3 compliance

SGP70 Isolating spark gap

These spark gaps are designed to protect metallic elements, like antennas, poles, pipes, roofing equipment... which are not connected to earth for operating reason, against the risk of flashover during a lightning strike on the installation.

When a large or exposed metallic element is not connected, for operating reasons, to the earthing system, it is better, in order to avoid destructive flashovers, to connect between the element and the grounded structure (or lightning conductor) a spark gap, which allows a punctual and a brief connection to earth during the lightning strike.

In stand-by situation, the spark gap insulates the element from the earth. During the lightning strike, the spark gap fires to create equipotentiality and to avoid destructive flashovers.

Electrical Characteristics
  • Rated DC withstand voltage Uw DC: 500 V
  • Rated AC withstand voltage Uw AC: 300 V
  • DC sparkover voltage (100V/s): 600-900 V
  • Follow current If: Yes
  • Max. discharge current max. withstand @ 8/20 μs by pole Imax: 70 kA
  • Impulse current by pole max. withstand 10/350μs by pole Iimp: 25 kA
  • Classification following IEC 62561-3: 1L
  • Insulation resistance IR: 1 Gohm
  • Rated impulse sparkover voltage 1kV/μs Ur Iimp: 1500 V
Mechanical Characteristics
  • Technology: Gas discharge tube
  • Connection to Network: Threaded rod M10
  • Operating temperature Tu: -40/+85°C
  • Protection rating: IP54
  • Outdoor application: No
  • Dimensions: 110 x 26 mm
  • Weight: 0.14 kg
  • Standards compliance: EN 50164-3, IEC 62561-3

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