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24 Operation principle and hardware description
Single-line circuit diagram of the DC/DC converter unit
This figure shows a connection example of a DC/DC converter unit with one frame
R8i module. The connection is the same in both Rittal VX25 and generic enclosures.
The table gives explanations for the numbers and letters of the diagram. It also
indicates if customer can order the components from ABB or if the customer needs
to acquire them separately.
A
DC/DC converter cubicle
1
DC bus
2
DC switch-disconnector (optional)
3
Charging switch fuse (optional)
4
Charging resistors (optional)
5
DC fuses (DC-bus side)
6
DC/DC converter module
2)
7
Filter module
8
Output DC fuses
9
Energy storage connection
1) Available from ABB or third party.
2) Available from ABB.
A
3
4
1)
1)
1)
1)
2)
1)
1
2
9
5
6
8
BDCL
7
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