Surge arrester POLIM-R ND
Silicone-housed surge arrester for DC traction system up to 3 kV with class DC-B
POLIM-R..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-R..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 installation in DC traction systems (A2)
- Equipment on rolling stock
- Secondary devices in DC installations
- Power electronics and solid state breakers
Brief performance data
| POLIM-R 1ND | POLIM-R 2ND | ||
|---|---|---|---|
| Maximum system voltage (Us) | kV | 1 | 1 |
| Continuous voltage through arrester (Uc) | kVrms | 0.14-1.00 | 0.14-1.00 |
| Rated voltage of arrester (Ur) | kVrms | 0.14-1.00 | 0.14-1.00 |
| Nominal discharge current (In) | kApeak | 10 | 20 |
| Thermal energy rating (Wth) | kJ/kV (Ur) | 9.5 | 19 |
For more details see the data sheet in downloads below.
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