Bay controller
The SIPROTEC 6MD85 and SIPROTEC 6MD86 bay controller are general-purpose control and automation devices with protection function. They are designed for use in all voltage levels from distribution to transmission. As part of the SIPROTEC 5 family, they enable a variety of protection functions from the SIPROTEC library.
![Bay controller Bay controller](https://assets.new.siemens.com/siemens/assets/api/uuid:1a6c4a6b8f6bafa3736c8e46168fc896e8b75104/width:100/quality:low/ptd0002653.jpg)
The SIPROTEC 6MD85 and SIPROTEC 6MD86 bay controller are general-purpose control and automation devices with protection function. They are designed for use in all voltage levels from distribution to transmission. As part of the SIPROTEC 5 family, they enable a variety of protection functions from the SIPROTEC library.