Kruger Ecowatt K320 Series Operation Manual page 360

Ecowatt Drive K320 series
®
Note: The accessory specifications described in the preceding table are ideal values. You can
select accessories based on the actual market conditions, but try not to use those with lower
values.
D.6 Reactors
When the voltage of the grid is high, the transient large current that flows into the input
power circuit may damage rectifier components. You need to configure an AC reactor on the
input side, which can also improve the current adjustment coefficient on the input side.
When the distance between the VFD and motor is longer than 50 m, the parasitic capacitance
between the long cable and ground may cause large leakage current, and overcurrent
protection of the VFD may be frequently triggered. To prevent this from happening and avoid
damage to the motor insulator, compensation must be made by adding an output reactor.
When a VFD is used to drive multiple motors, take the total length of the motor cables (that is,
sum of the lengths of the motor cables) into account. When the total length is longer than 50
m, an output reactor must be added on the output side of the VFD. If the distance between the
VFD and motor is 50 m to 100 m, select the reactor according to the following table. If the
distance is longer than 100 m, contact Kruger's technical support technicians.
DC reactors can be directly connected to the VFD models of 160P or higher and the 660 V series.
DC reactors can improve the power factor, avoid damage to bridge rectifiers caused due to
large input current of the VFD when large-capacity transformers are connected, and also avoid
damage to the rectification circuit caused due to harmonics generated by grid voltage
transients or phase-control loads.
Input reactor
VFD model
K320-2R2P-4
K320-003P-4
K320-5R5P-4
Table D-2 Reactors for AC 3PH 380V(-15%)–440V(+10%)
Input reactor
ACL2-1R5-4
ACL2-2R2-4
ACL2-004-4
DC reactor
DC reactor
/
/
/
-351-
Optional peripheral accessories
Output reactor
Output reactor
OCL2-1R5-4
OCL2-2R2-4
OCL2-004-4