Surge arrester POLIM-X ND
Silicone-housed surge arrester for DC traction system up to 3 kV with class DC-C
POLIM-X ND 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 62848-1 / EN 50526-1. POLIM-X..ND 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 DC traction systems against overvoltages from atmospheric discharges and switching conditions.
The arresters also meet the requirements for A1/A2 functions according to the VDV 525 recommendation:
- A1 – overvoltage protection of equipment connected to traction supply voltage
- A2 – overvoltage protection for apparatus connected to the running rails
Applications
- Fixed installations in DC traction systems (A1)
- Equipment on rolling stock and locomotives (A1)
- High speed trains
- Devices in DC installations
Brief performance data
| POLIM-X ND | ||
|---|---|---|
| DC class | DC-C | |
| Continuous voltage through arrester (Uc=Ur) | kV DC | 1.0-4.7 |
| Short-circuit current (Is) | kA DC | 40 |
| Charge transfer capability (Qt) | As | 7.5 |
| Thermal energy rating (Wth) | kJ/kV (Ur) | 28.0 |
For more details see the data sheet in downloads below.
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