INVT Goodrive350-19 Series Operation Manual page 516

Goodrive350-19 series VFD for crane
Note:

Select braking resistors according to the resistance and power data provided by our company,
but the resistance cannot be less than the min. allowable resistance in the table. Otherwise,
braking units may be damaged. In addition to the motor electricity generation power, braking
resistors are related to inertia, DEC time, and potential energy, that is, greater inertia, shorter
DEC time, and more frequent braking require braking resistors with higher power and smaller
resistance.

When grid voltages are different, you can adjust energy consumption braking threshold voltage.
For example, if the threshold voltage needs to be increased, you need to increase the braking
resistance.

The recommended min. power of a braking resistor indicates the rated power of the resistor that
can run in a long period of time in nature cooling condition. If air cooling fans are used, the
braking resistance can be decreased slightly.

When using an external braking unit, set the brake voltage class of the braking unit properly by
referring to the manual of the dynamic braking unit. If the voltage class is set incorrectly, the VFD
may not run properly.

In hoisting applications, the resistor resistance needs to be less than the braking resistance
applicable to 100% torque but greater than the min. resistance.
 Do not use braking resistors whose resistance is lower than the specified
minimum resistance. The VFD does not provide protection against overcurrent
caused by resistors with low resistance.
The 660V VFD models need to be configured with external braking units. Select braking resistors
according to the specific requirements (such as the braking torque and braking usage) on site.
Table D-10 Braking unit models for AC 3PH 520V(-15%)–690V(+10%)
VFD model
GD350-19-022G-6
GD350-19-030G-6
GD350-19-037G-6
GD350-19-045G-6
GD350-19-055G-6
GD350-19-075G-6
GD350-19-090G-6
GD350-19-110G-6
GD350-19-132G-6 DBU100H-160-6
Braking unit
applicable to 100%
model
braking torque (Ω)
DBU100H-110-6
Resistance Min.
power for
lifting (kW)
55
40.3
32.7 18.5
26.9
22 27.5
16.1 37.5
13.4
11
9.2
-504-
Optional peripheral accessories
Min. power
for
horizontal
moving (kW)
11 5.5
15 7.5
9
23 11.5
13.5
19
45 22
55 27.5
66 33
Min.
resistance
(Ω)
10
6.9