Surge arrester POLIM-S N
Silicone-housed surge arrester of IEC class station medium (SM) for AC systems up to 72 kV
POLIM-S..N is a surge arrester with metal-oxide (MO) resistors without spark gaps directly molded in silicone housing, grey color, designed and tested according to IEC 60099-4; and it fulfills the requirements of ANSI/IEEE C62.11. POLIM-S..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 medium voltage systems against overvoltages from atmospheric discharges and switching conditions.
Applications
- MV terminals of power transformers, star point
- Arc furnace transformers
- Traction systems – fixed installations
- Rolling stock and high speed trains
- Capacitors and capacitor banks, high capacity
- Medium-voltage motor
Brief performance data
| Polim-S N | ||
|---|---|---|
| Maximum system voltage (Us) | kV | 72 |
| Continuous voltage through arrester (Uc) | kVrms | 4-44 |
| Rated voltage of arrester (Ur) | kVrms | 5-55 |
| Nominal discharge current (In) | kApeak | 10 |
| Short-circuit current (Is) | kArms | 50 |
| Thermal energy rating (Wth) | kJ/kV (Ur) | 8.0 |
| Specified short-term load (SSL) | Nm | 3840 |
For more details see the data sheet in downloads below.
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