Series DDNR
Three-phase mains feedback choke
Description
Information:
- When using inverters, the network feedback choke is responsible for protecting the mains from voltage drops during commutation and the harmonics that occur (also during feedback).
- Outside the standard series listed below, we can also dimension mains chokes and mains feedback chokes specifically according to your specifications using our calculation computer, and have them manufactured by our trained professionals.
- Of course, we place great importance on adhering to the specified values during sizing, we produce according to the applicable regulations, and are striving to produce an optimal price-performance ratio for you.
- Three-phase mains feedback choke, rated voltage Un=3x400V
- usual design, short-circuit voltage
uk=8% Tf=3-4kHz/50Hz
- for current waveform similar to sine –> thermal current Ith = In
Chokes are vacuum impregnated with cast resin varnish to reduce humming and to increase insulation.
- High-quality insulation materials for insulation class T40/F
- Windings on coil bodies or freely suspended on the sheet metal package (improved cooling)
- Connections as terminals or cable lugs, depending on the amperage.
- All chokes are dimensioned by computer, individually tested including a high-voltage insulation test with several 1000V. CE compliant protection class IP00, suitable for installation up to IP21
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