The document introduces a surge arrester called 3EL2, which provides superior protection and is lightweight with strong performance.
The 3EL2 surge arrester uses silicone directly molded onto metal‑oxide blocks and a fibreglass‑reinforced plastic cage, giving it a lightweight yet robust design. The silicone housing is fire‑retardant, self‑extinguishing and maintains hydrophobicity for long‑term stability.
The manual covers technical data, installation and grounding procedures, mounting configurations, and application guidance for station and transmission‑line arresters up to 550 kV, including mechanical strength up to 4 kNm.
| System voltage range | 7.2 kV – 550 kV |
|---|---|
| Maximum mechanical strength | up to 4 kNm (dynamic) |
| Creepage distance | 31 mm/kV |
It protects systems from 7.2 kV up to 550 kV.
It is designed for mechanical requirements up to 4 kNm (dynamic).
The silicone housing is highly hydrophobic, preventing water and pollution from forming a conductive film.