Siemens Eupec, Manual

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MicroHarmony Cell Sizes 40 - 260A Manual Physical Description
19001467: Version 1.0 2-15
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2.10.3 Capacitors
Electrolytic capacitors are polarized. Check the polarity of the capacitor before energizing. Reverse voltage results
in capacitor destruction!
Do not over tighten the mounting bolts. Excessive torque will strip the threads. Should this occur, the capacitor
should not be used.
Always follow the assembly drawing for capacitor locations. This is not an issue on the 140A cell where all slots are
filled, but is a factor on smaller frames. The bus must have rear support and the second row from the front must be
occupied. Bus inductance is influenced by the distance between the capacitors and the IGBTs. Incorrect capacitor
location can cause IGBT stress.
The assembly drawing identifies the proper location and orientation. Some cells require a front bus support bracket.
Figure 2-8: Location and Orientation of Capacitors
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- BUS
1/3 BUS
2/3 BUS
+ BUS
40A
70A
100A
140A
200A
260A
70A
100A
140A
200A
260A
100A
140A
200A
260A
140A
260A