Surge arrester POLIM-K
Silicone-housed surge arrester of IEC class station low (SL) for AC systems up to 52 kV
POLIM-K 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-K 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 medium voltage systems against overvoltages from atmospheric discharges and switching conditions.
Applications
- Medium-voltage distribution transformer
- Pole mounted medium-voltage transformer
- Medium-voltage cable and cable termination
- Air-insulated medium-voltage switchgear and panel
Brief performance data
| POLIM-K | ||
|---|---|---|
| Maximum system voltage (Us) | kV | 52 |
| Continuous voltage through arrester (Uc) | kVrms | 4-44 |
| Rated voltage of arrester (Ur) | kVrms | 5-55 |
| Short-circuit current (Is) | kArms | 50 |
| Nominal discharge current (In) | kApeak | 10 |
| Thermal energy rating (Wth) | kJ/kV (Ur) | 4.5 |
| Specified short-term load (SSL) | Nm | 250 |
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