Condor Pressure Control GmbH CSDU-M - Star/Delta Connection With Pressure Switch MDR 3 The Star-delta connection is used in order to reduce high currents when starting electric motors. With this 2-stage starter the inrush current (star circuit) is reduced by 1/3 of the height to be expected when starting the motor directly. The Condor Pressure Control CSDU offers the possibility to operate a motor until 7.5 kW using public supply networks. This control can be connected to a power supply without neutral leader! The pressure switch MDR 3 included in the scope of supply replaces a contactor and can be delivered in different options. The Condor Pressure Control star/delta with pressure with MDR 3 is registered at the German Patent and Trademark Office as utility model number 20 2015 104 249 . For the star/delta connection special switches or contactor combinations are used. The pressure switch MDR 3 that has to be installed separately to the compressor of the new Condor Pressure Control star/delta CSDU-M serves as a so-called main contactor for this type of control. Thereby the contactor is not necessary anymore. The applied pressure switch MDR 3 can be used in different pressure ranges and has a wide variety of optional accessories (e.g. unloader valves, on-/off switch, phase sequence monitoring and phase drop monitoring, hourmeter kit, etc.). Both of the star/delta contactors as well as the star/delta change-over relays and the motor connecting clamps are built in a compact housing of the CSDU-M. STANDARD VERSION AND OPTIONS hour meter (optional) overload relay (optional) shunt release or undervoltage release (optional) phase sequence monitoring and phase drop monitoring (optional) Other options available on request ■ stable and compact housing (w 200 x h 240 x d 140 mm) ■ completely pre-wired and ready for connection ■ equipped with Condor pressure switch MDR 3, in function as main contactor (available in different variations -see main catalogue) ■ unloader valves ■ ON-OFF-switch INFORMATION / CONTACT: Technical Data CSDU-MDR 3 to din en 60947 Condor Pressure Control GmbH Warendorfer Str. 47-51 D-59320 Ennigerloh/Germany I Phone +49 (0)25 87-89-0 I [email protected] I Fax +49 (0)25 87-89-1401 www.condor-cpc.com *Technical changes and mistakes reserve.