Key facts
- Brand
- Siemens
- Model
- 8BK20
- Industry
- Industrial
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2012-03-16
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Siemens 8BK20 Switchgear Manual
The 8BK20 is a medium‑voltage (7.2‑12 kV) switchgear with withdrawable circuit‑breakers, intended for power stations, substations and industrial applications. The manual describes the product’s design, safety concepts, climate suitability and technical specifications.
Key sections cover personnel safety, operation of the withdrawable section, maintenance procedures, electrical data, climate class guidelines, and details on the central service truck used for moving the withdrawable unit. Standards and specifications are listed, along with contact information for Siemens regional offices.
Siemens 8BK20 specifications
| Rated voltage | 7.2 kV – 12 kV |
|---|---|
| Rated power‑frequency withstand voltage | 29.92 kV (7.2 kV) / 26.42 kV (12 kV) |
| Rated current of busbars | 4000 A |
Source: Siemens 8BK20 Switchgear Manual
All Siemens 8BK20 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How is personnel safety increased when operating the 8BK20 switchgear?
Safety is improved by opening and closing the switching device only with the door closed, and by isolating the circuit by moving the withdrawable section while the door remains closed.
What climate classes are applicable to the 8BK20 switchgear?
The switchgear can be used in climate classes 11, 12 and 13 as defined by IEC 72‑3‑3 and Siemens standard SN 29070.
What is the rated voltage range of the 8BK20 switchgear?
The 8BK20 is rated for voltages from 7.2 kV up to 12 kV.
What is the standard IP protection class of the switchgear?
The standard protection class is IP4X/IP40.