ABB POLIM-C..N MV HV Surge Arrester Line Discharge Class 2 AC Systems 7.5kV Indoor & Outdoor
ABB POLIM-C..N surge arresters are used for the short-circuit protection of medium voltage and high voltage electrical equipment and cables against overvoltages caused by lightning, atmospheric discharges and switching conditions up to 7.5kV.
POLIM-C..N surge arrester is intended for use indoors and outdoors – type ABB POLIM-C..LB is intended for use indoors only. ABB POLIM-C..N surge arresters are designed with metal-oxide (MO) resistors without spark gaps molded in silicone housing and tested according to IEC 60099-4 and meeting the requirements of ANSI/IEEE C62.11.
- IEC 60099-4:2014 – Part 4: Metal-oxide Surge Arresters Without Gaps For a.c. Systems
- ANSI/IEEE C62.11 IEEE Standard – Metal-Oxide Surge Arresters AC Power Circuits (>1 kV)
ABB POLIM-C..N surge arresters are for use with MV-HV cables, transformers, rotating machines, cable sheaths, secondary equipment, power electronics and other medium/high voltage equipment – T&D distribute cable joints, terminations and connectors to support the construction of electrical networks, substations and overhead lines for 11kV, 33kV and up to 66kV.
Surge arresters should be installed as close as possible to the medium/high voltage electrical equipment to be protected within the protective distance with sheds pointing downwards – minimum permissible distances between the surge arresters and the earth must be observed.
ABB POLIM-C..N MV HV Surge Arrester
Technical Specification
| Nominal Discharge Current /n 8/20μs | 10kA Peak |
| Line Discharge Class (LD) | 2 |
| High Current Impulse /hc 4/10μs | 100kA Peak |
| Long Duration Current Impulse | 550A / 2000μs |
| Short Circuit Rating /s 50 Hz | 20kA rms for 0.2s |
| Torque Moment | 50nm |
| Tensile Strength Axial | 1000N |
| Short Term Load SSL Horizontal To Axis | 350Nm |
| Long Term Load SLL Horizontal To Axis | 245Nm |
| Ambient Air Temperature | -60 to +40ºC |
| Altitude | Up to 1800m |
| Frequency of System Voltage | 16.7/50/60Hz |
| Weather Ageing Test | Tested according to test series A (1000 h salt fog) |
