3EL5
HV Surge Arrester 3EL5, Silicone rubber, cage design, 10 kA, ≤72.5 kV
3EL5
- Metal-oxide surge arrester for high-voltage systems up to Us 72.5 kV (Ur 3–60 kV)
- Silicone-rubber housing with Cage Design™ · line discharge class 2
- Energy absorption 4.4 kJ/kV, long-duration current impulse 550 A (2 ms), high current impulse 100 kA
- Protects transformers, circuit breakers, generators, motors, capacitors, bushings, switchgear and transmission lines; also available as non-gapped line arrester (NGLA)
- Type-tested to IEC 60099-4, IEEE C62.11 and GB 11032 in independent PEHLA-certified laboratories
Transformer protectionCircuit breaker and switchgear protectionGenerator and motor protectionTransmission line protection (NGLA)Capacitor bank protection
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3EL5 covers up to 72.5 kV of the hv station arresters range (≤ 800 kV across the category, √ scale).
Specifications
Main
| Product family | 3EL5 |
| Product type | Metal-oxide surge arrester |
| Application | High-voltage systems |
| Typical protection of | Transformers, circuit breakers, generators, motors, capacitors, traction vehicles, bushings, switchgear, transmission lines |
| Arrester types | Phase (P), neutral point (S), line surge arrester / NGLA (L) |
Electrical
| Max. system voltage Us | 72.5 kV |
| Max. rated voltage Ur | 60 kV |
| Min. system voltage | 3.6 kV |
| Rated voltage range Ur | 3 – 60 kV (3 kV steps) |
| Continuous operating voltage Uc | 2.4 – 48 kV |
| Nominal discharge current In | 10 kA |
| Short-circuit rating Isc | 40 kA |
| Line discharge class | 2 |
| Energy absorption capability | 4.4 kJ/kV (Ur) |
| Long-duration current impulse (2 ms) | 550 A |
| High current impulse | 100 kA |
| Residual voltage (8/20 µs, 10 kA), examples | Ur 9 kV → 25.7 kV · Ur 15 kV → 42.8 kV · Ur 60 kV → 171 kV |
Mechanical / environment
| Housing material | silicone |
| Design | Silicone-rubber cage design |
| Housing sizes | B, C, D, E, F, H, J, K (1 unit) and 2×H (2 units) |
| Housing height | 170 – 840 mm (housing B – 2×H) |
| Creepage distance | 372 – 2460 mm (housing B – 2×H) |
| Housing lightning impulse withstand (1.2/50 µs) | 104 – 484 kV |
| Housing power-frequency withstand (1 min, wet) | 49 – 226 kV |
| Specified short-term load SSL | up to 2940 N (housing B; 590 N for 2×H) |
| Specified long-term load SLL | up to 2050 N (housing B; 410 N for 2×H) |
| Dynamic bending moment | 0.5 kNm |
| Arrester weight | 3.6 – 10.2 kg |
| Sheds | Alternating sheds, gray silicone rubber; upright or suspended mounting |
| Line terminal | Flat DIN/NEMA 40×40 … 50×50 mm, hot-dip galvanized or stainless steel |
| Mounting base | Insulated or grounded, D = 200 – 254 mm |
| Silicone material temperature performance | –60 °C to +200 °C (housing material) |
| Housing flame retardance | Silicone rubber per IEC 60707 / UL94 V-0, self-extinguishing |
Standards & certifications
| Standards | IEC 60099-4, IEEE C62.11, GB 11032 |
| Type testing | Independent PEHLA-certified laboratories; routine test certificate with every arrester |
Options & variants
Representative phase-arrester ratings from the 3EL5 'Ratings and specifications' table (HV surge arresters brochure, p. 31); full range Ur 3–60 kV, line discharge class 2, long-duration current impulse 550 A.
| Type | Ur (kV) | Uc (kV) | Residual voltage @ 10 kA, 8/20 µs (kV) | Min. housing (height) |
|---|---|---|---|---|
| 3EL5 003-0P | 3 | 2.4 | 8.6 | B (170 mm) |
| 3EL5 009-0P | 9 | 7.2 | 25.7 | C (200 mm) |
| 3EL5 015-0P | 15 | 12.0 | 42.8 | D (240 mm) |
| 3EL5 024-0P | 24 | 19.2 | 68.4 | H (400 mm) |
| 3EL5 036-0P | 36 | 28.8 | 103 | J (470 mm) |
| 3EL5 045-0P | 45 | 36 | 128 | K (510 mm) |
| 3EL5 054-0P | 54 | 43 | 154 | 2×H (840 mm) |
| 3EL5 060-0P | 60 | 48 | 171 | 2×H (840 mm) |
Compatible accessories
Earth terminals
Earth terminal, copper tin-plated
Earth terminals
Eyebolt earth terminal
Earth terminals
NEMA earth, stainless steel
Earth terminals
Palm earth, aluminum
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 brochure (3EL5 section pp. 29–32)
Also covered in the technical library
Catalog High-voltage surge arresters — Product guide
Catalog High-voltage surge arresters — Siemens Energy product guide (online edition)
Flyer Line surge arresters for increased system reliability
Brochure Our portfolio of surge arresters & composite insulators — Siemens Energy
Ordered designations
Representative orderable type designations of this family — searchable via the catalog search.
Related products
3EL1 HV Surge Arrester 3EL1, Silicone rubber, Cage Design, 10 kA, ≤252 kV
Us ≤ 252 kV · In 10 kA · Silicone housing Datasheet · Dimensions ↓
3EL2 HV Surge Arrester 3EL2, Silicone rubber, Cage Design™, 10/20 kA, ≤420 kV
Us ≤ 420 kV · In 20 kA · Silicone housing Datasheet · Dimensions ↓
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