Goodrive300-LIFT series inverter
Peripheral optional parts
-167-
Brake resistors may increase the braking torque of the inverter. The resistor power values in the
above table are designed based on 100% of braking torque, and 10%, 50%, and 80% braking
use ratios. Select a braking system depending on the actual working condition.
If you need to use external brake units, see the instructions on dynamic brake units to set the
braking voltage degrees of brake units. Incorrect voltage degrees 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 brake resistor power according to the above table in frequent
braking situations (where braking usage > 10%).
D.8.3 Selecting brake resistor cables
Use shielded cables to serve as brake resistor cables.
D.8.4 Installing brake resistors
Install all resistors in the place with sufficient ventilation.
The materials near brake resistors must be non-flammable. The surface
temperature of resistors is high. Air flowing from the resistors is of hundreds of
degrees Celsius. Protect the resistor against contact.
Brake resistor installation
The inverters of 380V (≤15kW) only need external
brake resistors.
PB and (+) are the wiring terminals of the brake resistors.
GD300L
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Brake unit installation
Inverters of 380V 18.5
–
30kW support external brake units.
(+) and (-) are the connection terminals of brake units.
Both the wiring length between the inverter terminal (+) and brake unit
terminal (+) and length between the inverter terminal (-) and brake unit
