ABB 1SVR730824R9300 Three-Phase Monitoring Relay

ABB 1SVR730824R9300 Three-Phase Monitoring Relay

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Cables

Implementation of inductors in the output of each half-bridge affects a dynamic decoupling of the paralleled sections. If the impedance Z=ωL of the inductance Lσ is greater than the impedance of the IGBT modules, then the currents will be shared symmetrically through the output chokes. 

Apart from the current sharing effect the inductors Lσ may be used to reduce the dv/dt at the load. The output chokes are here in series with the load inductance. If the cable resistances are disregarded, you get an inductive voltage divider. A capacitance connected in parallel with the load inductance will achieve additional reduction of the dv/dt at the load.

ABB 1SVR730824R9300 Technical drawing:

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