The Condor Pressure Control GmbH CSDU Star/delta

 connection offers, in due consideration of the relevant

standards, the possibility of economically operating motors

with a switching capacity greater than 4 kW using public mains

networks.

 

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 torque is equally reduced during start-up

phase.

 

During the start-up phase (1 – 32 seconds), a special

change-over relay with a contact switching time of 50 ms,

guarantees reliable change over from star to delta operation.

 

During continuous operation, all motors connected to the

Star/delta connection are protected by a manual motor

starter with thermal and magnetic trip.

 

Standard executions contain a manual motor starter and an

on / off switch for the control circuit. Complete star/delta

connections additionally have a main circuit-breaker with

enclosure locking, an emergency button, an hour meter and

an operating LED.

 

Star/delta connections as standard-version with an additional

 transformer are used, if there is no neutral leader connected.

 

 

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.