8VN1
Gas-insulated switchgear 8VN1 Blue GIS, up to 145 kV, 50 kA, clean-air insulation with vacuum interrupter
8VN1
- Zero F-gases: clean-air insulation (80% N2 / 20% O2), 0 kg SF6, GWP 0 — no gas-handling training, density checks, reporting or end-of-life gas disposal
- Vacuum interrupter unit sealed for life and maintenance-free; first major inspection after more than 25 years, expected lifetime beyond 50 years
- LPIT option replaces approx. 1,500 kg of inductive CT/VT with 85 kg of integrated sensors in a cast-resin partition, reducing bay depth from 5.5 m to 3.7 m and bay weight from 6.0 t to 4.7 t (arrangement-dependent)
- Modular bay design: vacuum circuit-breaker, disconnector/earthing cross modules, high-speed make-proof earthing switch, plug-in cable termination, outdoor bushing and surge-arrester modules
- Low-temperature capability without liquefaction of the insulating medium, down to -50 °C ambient (conventional instrumentation)
High-voltage substations up to 145 kVSF6-free grid infrastructureSpace-constrained indoor substationsOutdoor switchgear installations
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8VN1 covers up to 145 kV of the gas-insulated switchgear range (≤ 550 kV across the category, √ scale).
Specifications
Main
| Product family | 8VN1 Blue GIS (Siemens Energy Blue portfolio) |
| Type | Gas-insulated metal-enclosed switchgear, modular bay design |
| Rated voltage | up to 145 kV |
| Insulation medium | Clean air (80% N2 / 20% O2), 0 kg SF6 / F-gases, GWP 0 |
| Interrupter technology | Vacuum |
| Instrumentation options | Conventional inductive CT/VT or Low-Power Instrument Transformer (LPIT) |
| First major inspection | > 25 years |
| Expected lifetime | > 50 years |
Electrical
| Rated frequency | 50 / 60 Hz |
| Rated short-duration power-frequency withstand voltage (1 min) | up to 275 kV |
| Rated lightning impulse withstand voltage (1.2/50 µs) | up to 650 kV |
| Rated continuous current — busbar / feeder / bus coupler | up to 3,150 A |
| Rated short-circuit breaking current | up to 50 kA |
| Rated peak withstand current | up to 135 kA |
| Rated short-time withstand current (up to 3 s) | up to 50 kA |
| Rated operating sequence | O-0.3 s-CO-3 min-CO / CO-15 s-CO |
Mechanical / environment
| Circuit-breaker drive mechanism | Stored-energy spring (single or common drive) |
| Rated filling pressure | 0.8 MPa (abs.) |
| Leakage rate per year and gas compartment (type-tested) | < 0.1 % |
| Bay width (common pole drive) | 1,000 mm |
| Bay height x depth (arrangement-dependent) | 3,200 x 5,500 mm (conventional CT/VT) / 2,900–3,100 x 3,700 mm (LPIT; sources differ) |
| Bay weight (arrangement-dependent) | 6.0 t (conventional CT/VT) / 4.7 t (LPIT) |
| Ambient temperature range | -50 °C to +55 °C (conventional); LPIT: -30 °C per 2024 flyer, -50 °C per 2025 presentation, to +55 °C |
| Installation | Indoor / outdoor |
Standards & certifications
| Ratings and type tests | IEC / IEEE (per manufacturer technical data; individual standards not itemized in source) |
| LPIT analog signal interface | IEC 61869-10 / -11, IEEE C37.92-2023 |
Options & variants
The two rows are the manufacturer-documented instrumentation configurations; no order-data-derived variants exist for this family. Dimensions and weights depend on bay arrangement: the 2024 flyer table quotes 3,100 mm bay height, -30 °C and 6.0 t / 4.7 t for the LPIT comparison, while the 2025 presentation quotes 2,900 mm, -50 °C and (in its size-comparison graphic) 5.8 t / 4.3 t.
| Configuration | Rated voltage | Short-circuit / continuous current | Bay H x D | Bay weight | Ambient range |
|---|---|---|---|---|---|
| 8VN1 with conventional instrument transformers (inductive CT + VT) | up to 145 kV | 50 kA / 3,150 A | 3,200 x 5,500 mm | 6.0 t | -50 °C to +55 °C |
| 8VN1 with Low-Power Instrument Transformer (LPIT) | up to 145 kV | 50 kA / 3,150 A | 2,900–3,100 x 3,700 mm | 4.7 t | -30 °C (2024 flyer) / -50 °C (2025 presentation) to +55 °C |
Documents & downloads
Brochure 8VN1 Blue GIS — product flyer, global edition 2024
Presentation 8VN1 Blue GIS 145 kV — product presentation 2025 (technical data, modules, LPIT)
Brochure 8VN1 Blue GIS 145 kV — EU markets edition 2021
Brochure 8VN1 Blue GIS 145 kV — China edition 2021
Catalog Gas-insulated switchgear from 72.5 kV up to 550 kV — portfolio overview (current online edition)
Ordered designations
Representative orderable type designations of this family — searchable via the catalog search.
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