Braking Resistor Installation - INVT Goodrive20-UL VFD Series Operation Manual

Goodrive20-UL Series VFD
Note:
 Select the resistor and power of the braking unit according to the data our company
provided.
 The braking resistor may increase the braking torque of the VFD. The resistor power in the
above table is designed on 100% braking torque and 10% braking usage ratio. If the users
need more braking torque, the braking resistor can decrease properly and the power needs
to be magnified.
 Never use a braking resistor with a resistance below the minimum value
specified for the particular VFD. The VFD and the internal chopper are not
able to handle the overcurrent caused by the low resistance.
 Increase the power of the braking resistor properly in the frequent braking
situation (the frequency usage ratio is more than 10%).
C.7.2 Braking resistor installation
Braking resistor cables need to be shielded cables.
Install all resistors in a place where they will cool.
 The materials near the braking resistor must be non-flammable. The
surface temperature of the resistor is high. Air flowing from the resistor is of
hundreds of degrees Celsius. Protect the resistor against contact.
Goodrive20-UL series VFDs need only external braking resistors.
(+)
Goodrive20-UL
PB
-152-
Optional peripheral accessories
External
braking
resistor