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WSP240/III/TT (Mains, Type 1 & 2)

The WSP240-III-TT Wallis mains distribution protection surge protector
Wiring diagram of a WSP240-III-TT mains distribution surge protector

Single Phase Type 1 and 2 tested (BS EN 61643) surge protector for use primarily on mains power distribution systems to protect connected equipment from transient overvoltages.

Designed for use at the boundaries of LPZ 0a to LPZ 2 as part of a coordianted SPD system (BS EN 62305), this type of protection is usually used for equipotential bonding in structures that have a Lightning Protection System (LPS) fitted, at the point cables enter the structure (LPZ 0a or b to LPZ1 boundary).

Features and Benefits:

  • For use on TT, TNS & TNC Systems.
  • Repeated protection in lightning intense environments.
  • Per-phase remote signalling contacts allow surge protection status to be monitored via a building management system.
  • Thermal disconnect for safe disconnection from abnormal or faulty supplies.
  • Suitable to be fitted in any 4 module enclosure.
Nominal VOperating V RangeMax. Current RatingMax. Surge Current 10/350μsNominal Surge Current 8/20μsMax. Surge Current 8/20μsLet-through VLocationPart Number
Nominal V240Operating V Range275 Max (L-N)Max. Current RatingN/A or 125A (config dependant)Max. Surge Current 10/350μs12.5kA (L to N); 25kA, (N to PE)Nominal Surge Current 8/20μs25kAMax. Surge Current 8/20μs40kA (L to N); 40kA, (N to PE)Let-through V<1.2kV @ IimpLocationLPZ 0-1 or 1-2Part NumberWSP240/III/TT

Tested: BS EN 61643-11

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