Transmission Line Surge Arrester (NGLA) upto 400kV
Transmission Line Surge Arrester (NGLA) upto 400kV, Power supply utilities have verified load losses due to voltage snags on their systems from transitory outages caused by lightning activity and causing permanent damages. The effect of these transitory disturbances on transmission lines are more critical in areas with high ground resistivity when associated with high lightning activity. Most non-scheduled outages are transitory in nature, with a fault time shorter than 1 minute, yet deemed to be unacceptable by power supply utilities. The loss of supply is critical for all modern industries reliant on sophisticated electronic equipment and production processes sensitive to momentary disturbances to the system. Raychem RPG’s Transmission Line Surge Arresters (TLA) provides reliability to the power system by reducing non-schedule outages caused by lightening.
- Arrester is built with short circuit fail safe characteristics
- Transmission line disconnector offered along with arrester
- Recommend suitable number of arresters and their positioning to minimize outages
- TLA suspended from transmission line gives enhanced performance
- TLA installed on towers subject to clearance
Description
Transmission Line Surge Arrester (NGLA) upto 400kV
These arresters are designed primarily to reduce lightning-related transmission-line outages. Raychem RPG states that they can be suspended directly from the transmission line or installed on towers, with the latter subject to required clearances. A transmission-line disconnector is also offered.
Features :
- Polymer-housed transmission-line surge arrester
- Metal-oxide surge protection
- Short-circuit fail-safe construction
- Available for systems up to 400 kV
- Designed/tested in accordance with IEC 60099-4
- CPRI, CESI and ERDA certification information is available from the manufacturer.
Key specifications :
| Parameter | TL-PCA | TL-PAA |
| Rated voltage, Ur | 66–400 kV | 66–400 kV |
| IEC 60099-4 line discharge class | Class 3 | Class 2 |
| Arrester class designation | SM | SL |
| Rated discharge current, 8/20 µs | 10 kA | 10 kA |
| Safe short-term load, 4/10 µs | 100 kA | 100 kA |
| Energy capability | 7.8 kJ/kV Ur | 4.5 kJ/kV Ur |
| Repetitive charge transfer | 2.2 C | 1.2 C |
| High-current short circuit | 63 kA | 40 kA |
Brand
Raychem RPG
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