8DADB: Gas-insulated medium-voltage switchgear

Why 8DADB?

The Siemens 8DA and 8DB family is a factory-assembled, type-tested, metal-enclosed series of gas-insulated medium-voltage switchgear built for primary distribution up to 40.5 kV. Designed for compact installations and long service life, the portfolio includes single-busbar and double-busbar options and variants for traction power.

Key attributes include vacuum switching technology, hermetically enclosed compartments and environmental independence. This makes the 8DA/8DB switchgear family well suited for transformer and switching substations across utilities, power plants, heavy industry and processing facilities.

Available models:

8DA10 (single-busbar)
8DB10 (double-busbar)
8DA11 and 8DA12 (single and double pole for traction)

Key benefits

Protect critical assets

Support safe operation in primary distribution applications by providing protection with IAC A FLR classification and short-circuit breaking, up to 40 kA.

Reduce maintenance needs

Lower upkeep demands with maintenance-free high-voltage components and hermetically sealed switchgear that support a service life of at least 35 years.

Adapt to site conditions

Designed for environmental independence with robust performance in saline air, high humidity, dust, and elevated altitudes — delivering reliable, long-lasting service across varied conditions

Featured capabilities

Compact gas-insulated design

Combine a compact footprint with metal-enclosed, gas-insulated construction designed for single-busbar and double-busbar applications in primary distribution.

High short-circuit performance

Support demanding fault levels with short-circuit breaking currents up to 40 kA and tested performance for heavy-duty industrial and utility environments.

Proven testing and standards

Deliver consistent quality with factory-assembled, type-tested switchgear built to IEC 62271-200 standards, with routine testing and standardized designs for dependable operation.