3EL2
HV Surge Arrester 3EL2, Silicone rubber, Cage Design™, 10/20 kA, ≤420 kV
3EL2
- Metal-oxide surge arrester for high-voltage systems from 12 kV up to 420 kV — phase, neutral-point, and line surge arrester versions
- Cage Design™: prestressed FRP rods with silicone rubber sheds molded directly onto the MO blocks — void-free, lightweight, safe overload behavior with ejection of internal parts prevented almost completely
- Line discharge class 2/3/4 with energy absorption up to 10 kJ/kVr and 65 kA rated short-circuit current
- Mounts upright, suspended, or horizontal; hydrophobic, fire-retardant, UV-stable silicone housing for polluted and coastal environments
- Tested to IEC 60099-4, IEEE C62.11 and GB 11032; type tests by independent PEHLA-certified labs, routine test certificate with every arrester
Transformer protectionCircuit-breaker and switchgear protectionTransmission-line surge protectionNeutral-point protectionCapacitor bank protection
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3EL2 covers up to 420 kV of the hv station arresters range (≤ 800 kV across the category, √ scale).
Specifications
Main
| Product family | 3EL2 |
| Product type | Metal-oxide surge arrester |
| Application | High-voltage systems |
| Protection of | Transformers, circuit breakers, generators, motors, capacitors, traction vehicles, bushings, switchgear, transmission lines |
| Versions | Phase arrester (P), neutral-point arrester (S), line surge arrester (L) |
Electrical
| Max. system voltage Us | 420 kV |
| Max. rated voltage Ur | 360 kV |
| Min. system voltage | 12 kV |
| Nominal discharge current In | 20 kA |
| Short-circuit rating Isc | 65 kA |
| Line discharge class | 2/3/4 |
| Energy absorption capability | 5.0 / 8.0 / 10.0 kJ/kVr (LD class 2 / 3 / 4, per IEC 60099-4) |
| Long-duration current impulse (2 ms) | 1100 A (class 2/3) · 1200 A (class 3/4) |
| High current impulse | 100 kA |
| Residual voltage examples (10 kA, 8/20 µs) | 70.5 kV @ Ur 30 kV (class 3) · 141 kV @ Ur 60 kV (class 3) · 864 kV @ Ur 360 kV (class 4) |
Mechanical / environment
| Housing material | silicone |
| Design | Silicone-rubber cage design |
| Cage Design™ construction | Prestressed FRP rods; silicone rubber sheds molded directly onto MO blocks and end fittings — void-free embedding, no sealed mechanical shell |
| Sheds | Alternating sheds, gray silicone rubber; upright or suspended mounting |
| Dynamic bending moment | 4.0 kNm |
| Specified short-term load SSL | 8290 N (housing C) … 1070 N (housing 3xM) |
| Specified long-term load SLL | 5800 N (housing C) … 750 N (housing 3xM) |
| Height | 482 – 3720 mm (housing sizes C … 3xM, 1–3 units) |
| Creepage distance | 1470 – 13485 mm (housing sizes C … 3xM) |
| Max. arrester weight | 17.7 – 93.2 kg (housing sizes C … 3xM) |
| Grading ring | 600 / 800 / 1000 mm diameter on housings W and larger |
| Mounting options | Grounded or insulated bases: D=140 mm grounded, D=200–276 mm insulated/grounded, 200×200 / 310×310 / 170×170 mm insulated |
Housing insulation withstand
| Lightning impulse 1.2/50 µs | 235 – 2028 kV (housing C … 3xM) |
| Switching impulse 250/2500 µs, wet | 170 – 1467 kV (housing C … 3xM) |
| Power frequency 1 min, wet | 109 – 945 kV (housing C … 3xM) |
Standards & certifications
| Standards | IEC 60099-4 · IEEE C62.11 · GB 11032 |
| Type tests | Performed by independent PEHLA-certified laboratories (DAkkS-accredited test field per DIN EN ISO/IEC 17025) |
| Routine tests | Every arrester factory routine-tested and delivered with a routine test certificate |
Options & variants
Representative phase-arrester ratings from the HV product guide ratings tables (pp. 42–43). Rows 1–4 correspond to the top-ordered SAP materials 3EL2024-2PC…, 3EL2030-2PC… (SURGE ARRESTER 30/24.4 kV), 3EL2060-2PF… (60/48 kV), 3EL2096-2PJ… — MLFB rated-voltage/housing codes match the catalog. Ures = maximum residual voltage at 10 kA, 8/20 µs.
| Us (kV) | Ur (kV) | Uc (kV) | LD class | Ures @ 10 kA 8/20 µs (kV) | Min. housing |
|---|---|---|---|---|---|
| 17.5 | 24 | 19.2 | 2 | 54.0 | C (482 mm) |
| 36 | 30 | 24.0 | 3 | 70.5 | C (482 mm) |
| 72.5 | 60 | 48 | 3 | 141 | F (705 mm) |
| 123 | 96 | 77 | 3 | 226 | J (1062 mm) |
| 245 | 192 | 154 | 3 | 451 | Q (1767 mm) |
| 362 | 288 | 230 | 4 | 691 | 2xM (2480 mm) |
| 420 | 360 | 288 | 4 | 864 | 3xJ (3186 mm) |
Compatible accessories
Earth terminals
Earth terminal, copper tin-plated
Earth terminals
Eyebolt earth terminal
Earth terminals
NEMA earth, stainless steel
Earth terminals
NEMA earth, copper
Earth terminals
Palm earth, aluminum
Earth terminals
Double D14 earth terminal
Terminal adapters
DIN/NEMA adapter terminal
Terminal adapters
Adapter DIN/NEMA to double NEMA
Line connection
Line clamp
Special options
Yellow cover panels
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 — Product guide (3EL2 pp. 39–46)
Handbook Metal-oxide Surge Arresters in High-voltage Power Systems
Flyer Line surge arresters (LSA)
Also covered in the technical library
Catalog A Full Range of Monitoring Solutions for Surge Arresters
Catalog High-voltage surge arresters — Siemens Energy product guide (online edition)
Brochure Our portfolio of surge arresters & composite insulators — Siemens Energy
Brochure Portfolio of Surge Arresters & Composite Insulators
Catalog Surge arresters for railway applications — Product guide
Ordered designations
Representative orderable type designations of this family — searchable via the catalog search.
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