Resonance choke type DRRT


These three-phase, dry-insulated choke coils are designed to deliver inductivity in series resonance circuits for audio frequency ripple control systems.

The resonance circuit is parallel to the audio frequency transmitter to provide mains current alleviation so that the higher frequency ripple control voltage can be fed into the medium voltage mains circuit.
Connections are made using the protruding copper bus-bars.
The choke can also be supplied with a PVC casing if required.

The DRRT choke is configured in a straight line so that the three coils sit on the three legs of an iron core.
The coil windings are copper wire; the windings are insulated using GRP profiles.
The core and coils sit on a steel base, which can be provided with transport chassis or vibration dampers if required.

These components are designed for indoor use located in an upright position.

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 Specifications:  DRRT 150
KB 20		  DRRT 225
KB 20 		  DRRT 300
KB 20 		  DRRT 450
KB 20 		  DRRT 600
KB 20 
           
 Inductivity:  5.9mH  3.9mH    2.95mH  1.95mH   1.3mH  
 Nominal current:  150A
ON 20% 		 225A
ON 20%  		 300A
ON 20%  		 450A
ON 20%  		 600A
ON 20%  
 Transmitting current:  100A   150A   200A   300A  400A  
 Weight: 270kg   410kg 420kg  680kg 690kg 




 Specifications:  DRRT 150
DB		  DRRT 225
DB		  DRRT 300
DB		  DRRT 450
DB		  DRRT 600
DB
           
 Inductivity:  5.9mH  3.9mH    2.95mH  1.95mH   1.3mH  
 Rated current:  150A
ON 120% 		 225A
ON 120%  		 300A
ON 120%  		 450A
ON 120%  		 600A
ON 120%  
 Transmitting current:  100A   150A   200A   300A  400A  
 Weight: 470kg   690kg 740kg  950kg 1150kg 


The ON percentage relates to one hour of operation (e.g.: 12% corresponds to 7.2 min/hour)