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Silicone-housed surge arrester AC systems up to 1 kV

POLIM-R..N is a surge arrester with metal-oxide (MO) resistors without spark gaps direct molded in silicone housing, grey color, designed and tested according to IEC 60099-4; and it fulfills the requirement of ANSI/IEEE C62.11. POLIM-R..N also has other certifications:

  • Shock and vibration tested according to IEC 61373
  • Fire and smoke behavior tested and classified according to EN 45545-2

It is used for secure protection of AC systems against overvoltages from atmospheric discharges and switching conditions.


  • Motors up to 1 kV
  • Energy absorber of semiconductor switching devices
  • Power electronics

Why Hitachi Energy?

  • Over 100 years of experience in overvoltage protection and more than 30 years with silicone insulation
  • Local and global Hitachi Energy application support
  • Proven safe short-circuit design
  • Design life of more than 30 years
  • Own production of metal-oxide (MO) resistors
  • Outstanding protection level
  • High energy withstand handling capability
  • UV resistant  silicone housing
  • High quality, safe and reliable, maintenance-free

Brief performance data

     POLIM-R..1N POLIM-R..2N
Maximum system voltage (Us)  kV  1 1
Continuous voltage through arrester (Uc)  kVrms  0.11-0.78 0.11-0.78
Rated voltage of arrester (Ur)  kVrms  0.11-0.78 0.11-0.78
Nominal discharge current (In)  kApeak  10 20
Thermal energy rating (Wth)  kJ/kV (Ur) 12.0  24.0

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