Switchgear
Transmission switchgear from 72.5 to 550 kV: gas-insulated switchgear with single- and double-busbar bays, live-tank and dead-tank circuit breakers built on the 3AP spring-drive platform, disconnectors, and the SF6-free Blue portfolio with clean-air insulation and vacuum interrupters.
Browse switchgear
Gas-insulated switchgear
Bays from 72.5 to 550 kV — including SF6-free Blue GIS with clean-air insulation.
8DN9 28DN98DN88DQ1 68DQ111 products →
Circuit breakers
Live-tank, dead-tank, and SF6-free Blue vacuum circuit breakers for transmission and sub-transmission networks.
3AP1 DT-1453AP1 DT-2453AP1 DT-3623AP1 DT-72.53AP1 DTC-14524 products →
Disconnectors
Centre-break, double-side break and knee-type disconnectors with built-on earthing switches and motor drives for air-insulated substations.
3DN3DN0/4/6/7/83DN33DN54 products →
Featured products
Most-documented entries in this area — full specifications, downloads and orderable designations.
3AP1 DT-245 Dead-tank circuit breaker 3AP1 DT, 245 kV, up to 63 kA, stored-energy spring drive
245 kV · up to 63 kA / 4,000 A · Dead tank, single-break interrupter Datasheet · Dimensions ↓ 3DN Centre/double-side break disconnector 3DN1/3DN2, 40.5–550 kV, up to 5,000 A / 63 kA, motor or manual drive
40.5 – 550 kV · Up to 4,000 A (3DN1) / 5,000 A (3DN2), 63 kA 1 s/3 s · Centre break (2-column) / double-side break (3-column) Datasheet · Dimensions ↓
3AV1 FG-145 Live-tank vacuum circuit breaker 3AV1FG Blue, 145 kV, 40 kA, clean-air insulation (zero SF6)
Up to 145 kV · 40 kA / 3,150 A · Clean air + vacuum, zero SF6 Datasheet · Dimensions ↓ 3AP1 DT-145 Circuit breaker 3AP1, 145 kV, 40 kA, stored-energy spring drive
145 kV rated voltage · 40 kA breaking / up to 3,150 A · SF6 self-compression interrupter, spring drive Datasheet · Dimensions ↓How to choose switchgear
Space, environment and sustainability targets drive the technology choice: GIS for compact or harsh-environment substations, AIS live-tank breakers for open-air bays, dead-tank where bushing CTs and seismic performance matter. Blue (SF6-free) variants remove the insulation gas's global-warming potential entirely.
- Compact/indoor substations up to 550 kV → 8DN8, 8DN9, 8DQ1 GIS
- SF6-free bays up to 145 kV → 8VN1 Blue GIS, 3AV1 vacuum breaker
- Open-air bays → 3AP1/3AP2 live-tank; high fault duty and multi-CT schemes → dead-tank
- Bay isolation → 3DN centre-break and knee-type disconnectors
Official brochures — current online editions
Mirrored from the published marketing literature on siemens-energy.com; source links included.
Technical documentation
33 documents available across this area — datasheets, catalogs and drawings.
Catalog High-Voltage Circuit Breakers from 72.5 kV up to 1100 kV (2022) (current online edition) Flyer 3AP1 DT up to 170 kV with mixed gases for lowest temperature applications Brochure High-voltage compact switchgear 3AP1 DTC for 145 kV and 245 kV (Siemens Energy, 2023) Datasheet SPS2S 245 kV High Voltage Dead Tank Circuit Breakers (2021)Own or operate this equipment?
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