ABB 1SAZ321201R1006 NC TRIP CONTACT

ABB 1SAZ321201R1006 NC TRIP CONTACT

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Cables

By using current-compensation chokes in the output phases of the parallel circuit, one by the so-called “ring circuit“has found a further way how to minimize current asymmetries in the IGBT parallel circuit. The principle can be compared to that shown in figure 13b. 

The inductance of each choke is a function of the current difference L= f(∆i) and is applicable only for the difference current. If the current in the phases is identical, the inductance of the choke equals to zero. Different load conditions with varying thermal conditions can lead to different levels of thermal stress in applications using the same type of industrial power module, IPM module, and/or discrete device. 

Specification is a necessary procedure to warrant the required lifetime of a power semiconductor device. Load-generated stress should not exceed the limits defined by the corresponding diagrams.

ABB 1SAZ321201R1006  Technical drawing:

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