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The WSP-T2PDM3-20-50-275R Wallis mains distribution surge protector
Wiring diagram of a WSP-T2PDM3-20-50-275R mains distribution surge protector

The WSP-T2PDM3/20/50/275R is a four-pole, metal oxide varistor surge arrester combined with a gas discharge tube, Type 2 according to BS EN 61643-11 and IEC 61643-11. These arresters are recommended for use in the Lightning Protection Zones Concept at the boundaries of LPZ 1-2 (according to IEC 1312-1 and BS EN 62305), where they provide the equipotential bonding and discharge of the switching overvoltage, which is generated in power supply systems entering the building.

The main use of the WSP-T2PDM3/20/50/275R arrester is in all kinds of industry, residential and administration buildings. They are to be placed into the subsidiary switchboards or control boxes.

The unit has removable and replaceable modules:

Features and Benefits:

  • Simple to install.
  • Minimum life of 100,000 hours.
  • Lightweight item weighing 346g.
Maximum Continuous Operating Voltage (Uc)Maximum Discharge Current (Imax)Nominal Discharge Current for Class II Test (8/20) (In)Total Discharge Current (8/20) L1+L2+L3+N -> PE (Itotal)Voltage Protection Level (Up)Impulse Discharge Current for Class I Test (10/350) N/PE (Iimp)Temporary Overvoltage (TOV) L/N (Ut)Temporary Overvoltage (TOV) N/PE (Ut)Short-circuit Withstand Capability (IP)Part Number
Maximum Continuous Operating Voltage (Uc)275V AC/350V DCMaximum Discharge Current (Imax)50 kANominal Discharge Current for Class II Test (8/20) (In)20 kATotal Discharge Current (8/20) L1+L2+L3+N -> PE (Itotal)50 kAVoltage Protection Level (Up)<1.3 kVImpulse Discharge Current for Class I Test (10/350) N/PE (Iimp)20 kATemporary Overvoltage (TOV) L/N (Ut)335 V/5sTemporary Overvoltage (TOV) N/PE (Ut)1200V/0.2sShort-circuit Withstand Capability (IP)60 kArmsPart NumberWSP-T2PDM3/20/50/275R


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