Class 1 Metal Oxide

from only POA

Protection of MV networks and equipment from lightning and switching surge related overvoltages. Designed and optimised to protect distribution assets including transformers and
cable end terminations
Direct moulded housing to prevent moisture ingress
Low residual voltages
High energy handling
Safe non-shattering short circuit behaviour to high current levels
Maintenance free
Hydrophobic silicon housing (tracking and erosion resistant)
Excellent cantilever and tensile performance
Tested in accordance with IEC60099-4 at independent accredited laboratories

Technical Data

Material (porcelain or Polymeric)
Lightning impulse withstand voltage (BIL)0Um kV r.m.s - Lightning impulse withstand voltage of equipment (BIL) kV r.m.s
Creepage distance (mm/kV)
Maxiumum continuous operating voltage
System temporary over voltage
System temporay over voltage duration
Umax (maxiumum system phase to earth voltage in system) (kV)
Duty rating (kV) – “Duty cycle voltage” is a term used in IEEE standards; IEC equivalent would be as follows: Surge arrester rating (kV)
Line discharge class (1-5)
Energy capability (kJ/Kv at Ur)
Pollution performance 1-4/A-E(16,20,25,31,40/50mm)
Earthing system:multi earthed, effectivity earthed, resistive earthed, isolated, Reactance)
Fixing arrangements: Line termination, Earth termination, mounted arrangement.
Surge counters required?

Generic Technical Data

DA1 Series: 4-39kV
Rated discharge current (8/10μs): 10kA
Line discharge class 1 according to: IEC 60099-4 (2006)
Operating duty impulse withstand current (4/10μs): 100kA
Long duration current impulse (2000μs): 325A
10 second TOV, (UTOV/Uc): 1.29*Uc
High current short circuit: (pre-failing methord) (safe non-shattering failure mode): 21kA
Energy: 5.6kJ/kV
Service conditions (Ambient temperature): -60 to +60°C

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