Placing The Brake Resistor - INVT Goodrive20-EU VFD Series Operation Manual

Goodrive20-EU series VFD
Model
GD20-004G-4-EU
GD20-5R5G-4-EU
GD20-7R5G-4-EU
GD20-011G-4-EU
GD20-015G-4-EU
GD20-018G-4-EU
GD20-022G-4-EU
GD20-030G-4-EU
GD20-037G-4-EU
GD20-045G-4-B-EU
GD20-055G-4-B-EU
GD20-075G-4-B-EU
GD20-090G-4-B-EU
GD20-110G-4-B-EU
Note:
Select the resistor and power of the brake unit according to the data our company provided.
The brake 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 brake resistor can decrease properly and the power needs to
be magnified.


C.7.2 Placing the brake resistor
Use shielded cables for brake resistor cables.
Install all resistors in a place where they will cool.

Brake
resistor at
Type of
100% of
brake unit
braking
torque (Ω)
122
89.1
65.3
44.5
32.0
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 brake resistor properly in the frequent braking
situation (the frequency usage ratio is more than 10%).
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.
Consumed power of the brake
10%
braking
0.6
0.75
1.13
1.65
2.25
27 3
22 3
17 5
13 6
10 7
8 8
6.5 11
5.4 14
4.5 17
161
Peripheral options and parts
resistor (kW)
50% 80%
braking braking
3
4.13
5.63
8.25 13.2
11.3
14
17
23
28
34
41
56
68 108
83 132
Min.
brake
resistor
(Ω)
4.8 80
6.6 60
9 47
31
18 23
22 19
26 17
36 17
44 11.7
54 8
66 8
90 6.4
4.4
4.4