TDK Corporation offers the DeltaCap X Black Premium – their new series of EPCOS MKD capacitors for PFC. With rated voltages covering 440VAC and 850VAC, the capacitors with an internal delta connection are intended for PFC and filtering of harmonics at the low-voltage level. With capacitance values of 3 x 51µF to 3 x 165µF, PFCs ranging from 20kvar to 44kvar (50/60Hz) per capacitor are obtained.
The special black coating increases the dissipation of heat, thereby delivering a very long service life of up to 300,000 hours in accordance with temperature class -40/D.
Due to the remarkably rugged construction, the capacitors of the B32305A* series can endure a maximum inrush current of 500 x IR, temperatures of up to +65C and perform up to 62,000 operating cycles per year.
The types are self-healing and are furnished with an overpressure disconnector which isolates all three phases from the grid in the case of damage. The impregnation, based on biodegradable soft resin, has an added positive effect on the heat dissipation.
The capacitors are ideal for use with or without reactors in conventional and dynamic PFC systems and also for usage in tuned resonant circuits in industrial power grids and harmonic filters.
The main applications for the devices are PFC in industrial networks; and filtering of harmonics in tuned resonant circuits.