The product is a fixed-mounted circuit-breaker switchgear with a model number of 8DA and 8DB, rated voltage of 40.5 kV, and is suitable for indoor installation. The product features include: metal enclosure, metal clad, gas insulated.
This document provides an overview of the Siemens 8DA and 8DB fixed‑mounted circuit‑breaker switchgear series, covering typical applications such as public power supply, traction power, and various industrial sectors. It describes the modular, corrosion‑resistant aluminium housing, gas insulation, and compact panel width of 600 mm.
Key technical information includes rated voltage, short‑circuit breaking capacity, dimensions, protection degrees (IP65 for primary parts), and installation guidelines for room planning, floor openings, and fixing points. The sheet also lists applicable standards and safety features.
| Short‑circuit breaking current (max) | 40 kA |
|---|---|
| Short‑circuit making current (max) | 100 kA |
| Normal busbar current (max) | 4000 A |
| Ambient temperature range | -5 °C to +55 °C |
| Panel width | 600 mm |
| Degree of protection (primary enclosure) | IP65 |
The primary enclosure meets IP65 protection.
It can handle up to 100 kA short‑circuit making current.
The panels are 600 mm wide.