Surge arrester POLIM-I N
Silicone-housed surge arrester of IEC class station low (SL) for AC systems up to 72 kV
POLIM-I N is a surge arrester with metal-oxide (MO) resistors without spark gaps directly molded in silicone housing, in grey color, designed and tested according to IEC 60099-4; and it fulfills the requirement of ANSI/IEEE C62.11. POLIM-I..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
- Generators
- Traction system – fixed installations
- Rolling stock and locomotives
Brief performance data
| Polim-I N | ||
|---|---|---|
| Maximum system voltage (Us) | kV | 72 |
| Continuous voltage through arrester (Uc) | kVrms | 4-44 |
| Rated voltage of arrester (Ur) | kVrms | 5-55 |
| Short-circuit current (Is) | kArms | 40 |
| Nominal discharge current (In) | kApeak | 10 |
| Thermal energy rating (Wth) | kJ/kV (Ur) | 5.0 |
| Specified short-term load (SSL) | Nm | 2240 |
For more details see the data sheet in downloads below.