3EH2
MV Plug-in Arrester 3EH2, Metal-enclosed plug-in design for gas-insulated switchgear, 10 kA, Ur ≤52 kV
3EH2
- Metal-oxide surge arrester with plug-in connection for distribution systems and metal-enclosed gas-insulated switchgear
- For system voltages up to 45 kV nominal / 52 kV highest voltage for equipment; maximum rated voltage Ur 52 kV
- Nominal discharge current In 10 kA · energy absorbing capability 1.3 kJ/kV at thermal stability · long-duration current impulse (2 ms) 200 A
- Metal housing with 16 kA maximum short-circuit rating — arrester installs inside the switchgear enclosure instead of on an outdoor insulator
- Legacy member of the 3EH/3EN plug-in product line; the plug-in family in the current MV surge-arrester catalog is the 3EH4 (inner-cone connection per EN 50180/50181, up to 52.5 kV)
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3EH2 covers up to 52 kV of the mv distribution arresters range (≤ 72.5 kV across the category, √ scale).
Specifications
Main (GT product hierarchy — Plug-In Surge Arresters 3EH / 3EN)
| Product family | 3EH2 |
| Product type | Metal-oxide surge arrester, plug-in design |
| Product line | Plug-In Surge Arresters (3EH / 3EN) |
| Application | Distribution systems; metal-enclosed gas-insulated switchgear with plug-in connection |
Electrical (Siemens Power Engineering Guide T&D, 4th ed., Fig. 37 — low- and medium-voltage arresters overview)
| Nominal system voltage (max.) | 45 kV |
| Highest voltage for equipment (max.) | 52 kV |
| Maximum rated voltage Ur | 52 kV |
| Nominal discharge current In | 10 kA |
| Max. energy absorbing capability (at thermal stability) | 1.3 kJ/kV |
| Max. long-duration current impulse, 2 ms | 200 A |
| Max. short-circuit rating | 16 kA |
Mechanical / installation (Siemens Power Engineering Guide T&D, 4th ed., Fig. 37)
| Housing material | Metal |
| Connection | Plug-in |
| Installation | Inside metal-enclosed (gas-insulated) medium-voltage switchgear |
Standards & series context (PEG 4th ed.; MV Surge Arrester Catalog 2026)
| Technology | Gapless metal-oxide (MO) arrester |
| Application guidance | IEC 60099-5 (arrester selection and application; GIS-installed arresters offer a higher protective safety margin per §4.3.2.2, as cited in the PEG) |
| Successor plug-in family | 3EH4 — the plug-in arrester in the current Siemens Energy MV surge-arrester catalog (class DH, up to 52.5 kV, connector sizes 2/3 per EN 50180 / EN 50181) |
Documents & downloads
Downloads served from the DAM (Aprimo) via the CMS in production.
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