Goodrive35 Series Closed-loop Vector Control VFD Optional peripheral accessories
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The rated working current
of the contactor (A)
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 INVT's technical
support technicians.
DC reactors can be directly connected to VFDs of 380 V, 37 kW 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.
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