Technical Data
10 Basic Supply Unit BUG 622, 623
5.94034.07a Baumüller Nürnberg GmbH
2.1.1 Function description
y Input rectifier
The input rectifier is a non-controlled rectifier. To mains with a nomial voltage from 400 V to 460 V
(for units of development stages 000, 001,
100, 110) or 400 - 480 V (for all other development stag-
es) the unit can be connected without transformator and series reactor.
y Starting current load relief
If precautions are not taken, the DC link capacitors produce inadmissibly-large charging current
surges from the mains. In order to avoid these surges, the starting current is restricted by a load relief
device.
To this purpose, a resistance is integrated into the DC link which restricts the charging current to a
maximum of 100 A (with the exception of temporary mains failure), and is bypassed once the DC link
is charged.
The cycle time for connect the unit in circuit again is 10 min.
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