9.9.1 DC Bus topology with Y connectors (24 A max.)
Without DC Bus fuses, other devices can become damaged or destroyed if, for example, a
device fails due to an internal short circuit. If multiple drives are connected in parallel, then it
is usual to insert DC Bus fuses (➜ # 40). between groups of drives (with a group consisting
of two or three devices, depending on the current) in order to limit any possible resulting dam-
age. Fuses cannot avoid damage by current peaks completely.
9.9.2 DC Bus topology with busbar
This wiring does not require Y connectors. If a device fails due to a short-circuit, only its DC
Bus fuses (➜ # 40). are tripped and the rest of the network continues uninterrupted. The solid
busbars can conduct significantly larger currents, because the compensating current does
not flow through the connector as above. For this reason, almost as many drives as desired
can be connected in parallel in this form. This arrangement is frequently also useful for con-
necting KCM capacitor modules.
AKD Installation | 9 Electrical Installation
Kollmorgen | kdn.kollmorgen.com | October 2017 109
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