SED2 Operation & Maintenance Manual
12 Siemens Building Technologies, Inc.
Operation in Ungrounded Systems
IP20: SED2 drives (IP20) can operate in ungrounded systems, and remain in operation when an
input phase connects to ground. In the event of an output phase with a ground fault, the SED2
switches off and displays fault code F0001.
NOTE: Operation in ungrounded systems is possible only using the SED2 (IP20) without filter.
IP54: SED2 drives (IP54) cannot operate in ungrounded systems.
Ungrounded Systems and Y Capacitor
In ungrounded systems, remove or disconnect the Y capacitor (and integrate an output choke) per
Figure 3.
LK 700
1
2
5192Z01
Figure 3. Disconnecting Y Capacitor in SED2 Frame Size A.
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