3EV1
HV Line Arrester 3EV1 (EGLA), Externally gapped line arrester, SVU based on 3EL1, ≤252 kV (IEC 60099-8)
3EV1
- EGLA to IEC 60099-8: external series spark gap galvanically isolates the SVU — no leakage current under normal service conditions
- Limits ground-fault current from several kA to a few amperes and extinguishes the arc within the first half-cycle (~10 ms) — no circuit-breaker reclosing operation needed
- SVU based on the 3EL1 silicone-rubber Cage Design™ arrester (IEC 60099-4), line discharge class 2/3, 65 kA short-circuit rating
- No disconnector and no ground lead — highly compact, suited for multi-circuit towers with short cross-arm clearances and for live installation
- Metal-oxide surge arrester for overhead transmission lines, system voltages 3.6–252 kV
Overhead transmission line protectionLightning outage reductionMulti-circuit tower installationsLive-line installation retrofits
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3EV1 covers up to 252 kV of the line arresters (egla) range (≤ 420 kV across the category, √ scale).
Specifications
Main
| Product family | 3EV1 |
| Product type | Metal-oxide surge arrester |
| Application | Overhead transmission lines |
| Design | EGLA — external series spark gap + series varistor unit (SVU) |
| Series varistor unit (SVU) | Based on 3EL1 silicone-rubber Cage Design™ arrester |
| Operating principle | Gap ignites on lightning overvoltage; SVU limits follow current; arc extinguished within first half-cycle — no reclosing operation |
Electrical
| Max. system voltage Us | 252 kV |
| Max. rated voltage Ur | 210 kV |
| Min. system voltage | 3.6 kV |
| Nominal discharge current In | 10 kA |
| Short-circuit rating Isc | 65 kA |
| Line discharge class | 2/3 |
| Energy absorption capability (SVU) | 5.0 kJ/kVr (class 2) / 6.0 kJ/kVr (class 3) |
| Long-duration current impulse, 2 ms (SVU) | 750 A (class 2) / 800 A (class 3) |
| High current impulse (SVU) | 100 kA |
| Residual voltage 8/20 µs, 10 kA (SVU examples) | 153 kV @ Ur 60 kV · 245 kV @ Ur 96 kV · 505 kV @ Ur 198 kV |
| Leakage current in normal service | None — series gap isolates the MOV blocks from line voltage |
Mechanical / environment
| Housing material | silicone |
| Design | Silicone-rubber cage design |
| Silicone type | HTV / LSR silicone rubber, sheds directly molded onto MO blocks and end fittings (bubble- and gap-free) |
| Housing heights (SVU sizes C…2xK) | 305–1805 mm (1–2 units) |
| Creepage distance (SVU sizes C…2xK) | 900–6150 mm |
| Specified short-term load SSL (SVU) | 3930 N (size C) … 660 N (size 2xK) |
| Specified long-term load SLL (SVU) | 2750 N (size C) … 460 N (size 2xK) |
| Bending moment, dynamic (SVU) | 1.2 kNm |
| Arrester weight (SVU) | 7.9–29.3 kg depending on housing size |
| Silicone temperature performance | −60 °C to +200 °C (material property) |
| Flammability | Flame-retardant, self-extinguishing per IEC 60707 / UL94 V-0 |
Standards & certifications
| Standards | IEC 60099-4 |
| Line-arrester standard | IEC 60099-8 (EGLA) |
Options & variants
Representative series-varistor-unit (SVU) ratings from the 3EL1 phase-arrester tables (HV surge arresters brochure pp. 35–37) — the 3EV1 EGLA uses a 3EL1-based SVU per IEC 60099-8; the external series gap means a lower arrester rated voltage is required than for a gapless design.
| Us (kV) | Ur (kV) | Uc (kV) | LD class | Residual voltage 8/20 µs @ 10 kA (kV) | Min. housing (height mm) |
|---|---|---|---|---|---|
| 3.6 | 3 | 2.4 | 2 | 7.7 | C (305) |
| 12 | 12 | 9.6 | 2 | 30.6 | C (305) |
| 36 | 30 | 24.0 | 2 | 76.5 | E (445) |
| 72.5 | 60 | 48 | 2 | 153 | H (620) |
| 123 | 96 | 77 | 2 | 245 | K (900) |
| 145 | 120 | 96 | 2 | 306 | 2xH (1245) |
| 170 | 150 | 120 | 2 | 383 | P (1350) |
| 245 | 198 | 158 | 2 | 505 | 2xK (1805) |
Compatible accessories
Monitoring
Surge counter (basic)
3EX5 030-0
Monitoring
Leakage current meter (≤50 mA)
3EX5 050-0
Monitoring
ACM Basic — condition monitor
3EX5 080-0
Monitoring
ACM Advanced — wireless IoT monitor
3EX5 080-1
Documents & downloads
Catalog High-voltage surge arresters — brochure
Flyer Line surge arrester (LSA) flyer
Also covered in the technical library
Catalog High-voltage surge arresters — Siemens Energy product guide (online edition)
Flyer Line surge arresters for increased system reliability