INVT GD300-004G-4, Operation Manual

Page: 309 / 312

Goodrive300 inverters Appendix D
308
The cousumped power of the
braking resistor
Model
Model of
braking
unit
Braking
Resistor
at 100% of
the
braking
torque(
Ω
)
10%
braking
50%
braking
80%
braking
The
cousumped
power of
the braking
resistor
GD300-500G-6 4.8*2 38*2 188*2 300*2
GD300-560G-6 4.3*2 42*2 210*2 336*2
GD300-630G-6
Two
DBU100H-320-6
3.8*2 47*2 236*2 378*2
3.4*2
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 inverter. 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.
When using the external braking units, please see the instructions of the energy braking
units to set the voltage degree of the braking unit. Incorrect voltage degree may affect the
normal running of the inverter.
 Never use a brake resistor with a resistance below the minimum value
specified for the particular drive. The drive 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%).
D.8.3 Selecting the brake resistor cables
Use a shielded cable to the resistor cable.
D.8.4 Placing the brake resistor
Install all resistors in a place with enough ventilation.
 The materials near the brake 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.
Installation of the braking resistor: