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Surge Protectors
WST-N Surge Protective Device
The Type 1+2 range configured for a T/T system, where the neutral has to be protected against the earth rather than treated as a reference. A gas discharge tube sits in the N-PE path and the remaining poles carry the varistor modules, so a 1P+N device is one tube and one varistor rather than two of a kind.
Technical overview
Core specifications
TypeType 1+2
Poles1P+N, 3P+N
SystemT/T, with N-PE protection
Rated voltage Uc320V AC on the line poles · 255V AC on the N-PE module
N-PE moduleGas discharge tube, no In or Imax rating of its own
Lightning impulse current Iimp (T1)12.5kA, 10/350us
Nominal discharge current In (T2)30kA, 8/20us on the line poles
Maximum discharge current Imax (T2)60kA, 8/20us on the line poles
Voltage protection level UpUp to 2.0kV
Operating temperature-40 to +80 degrees C
Protection classIP20
Dimensions89.6 x 71.7 x 80.8mm (3P+N), 35mm DIN rail
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Technical files
Datasheet, dimensions and certificate scope
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PDF · Product datasheet DWG/PDF · Dimensions & installation PDF · Certificate scope
Request Technical Files Typical use
- T/T installations at the service entrance
- Residential and light commercial main boards
- Sites with an external lightning protection system
Compliance references
- IEC / EN 61643-11
- CE · UKCA marked on the product
Customisation scope
- Marking
- Packaging
- Pole assortment
Related products
Other products supplied for the same installations.
Surge Protectors
WSA Surge Protective Device
Type 2 protection across twelve models: three discharge ratings in one to four poles, so a single-phase consumer unit and a three-phase board with neutral are served from the same platform. A window on each module turns red when the module has reached the end of its life and needs replacing.
View specifications →
Surge Protectors
WSA+N Surge Protective Device
The T/T arrangement of the WSA platform. The same three discharge ratings are supplied with a dedicated N-PE module alongside the phase modules, for installations where the neutral is not bonded to earth at the board. Six models: 1P+N on two modules, 3P+N on four.
View specifications →
Surge Protectors
WSP Mini Surge Protective Device
The same Type 2 duty in a single module instead of two, for boards where the spare ways are the constraint. The protection cartridges are pluggable, so a module that has reached the end of its life is exchanged without disturbing the wiring, and a green window plus a remote alarm contact both report the fault.
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