Siemens SINAMICS S120 Manual page 340

Air-cooled chassis power units

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Table of Contents

DC link components

7.1 Braking Module

"Overvoltage" fault

Even when the response threshold is set to a low value, the DC-link voltage can still reach the

maximum voltage value (hardware shutdown threshold), thus triggering the "Overvoltage"

fault. This can occur, for example, in cases where there is too much regenerative energy for

the available braking power.

To prevent the DC-link voltage from exceeding the threshold, the Vdc-max controller must be

enabled (p1240) and the device supply voltage set accordingly (p0210).

Air-cooled chassis power units

Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3