Danfoss VLT Drives (Loves Park, IL) has introduced D-Frame VLT® drives available in a power range from 125-450 HP (90-315 kW). They leverage back channel cooling to remove 90% of the heat generated by the drive. The drives are available with IP20, IP21 (NEMA 1), or IP 54 (NEMA 12) enclosure protection ratings. They come standard with conformal-coated printed circuit boards, which together with the optional heat sink access panel, help to extend drive lifetime and reliability. The units can be factoryfitted with optional semiconductor fuses. Additional options such as mains disconnect, contactor, and circuit breaker are available.
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