INVT GD300L-1R5G-S2 User Manual

Goodrive300-LIFT series inverter Peripheral optional parts
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D.8 Braking system
D.8.1 Selecting the braking components
It is appropriate to use brake resistor or brake unit when the motor brakes sharply or the motor is
driven by a high inertia load. The motor will become a generator if its actual rotating speed is higher
than the corresponding speed of the reference frequency. As a result, the inertial energy of the motor
and load return to the inverter to charge the capacitors in the main DC circuit. When the voltage
increases to the limit, damage may occur to the inverter. It is necessary to apply brake unit/resistor to
avoid this accident happens.
 Only qualified electricians are allowed to design, install, commission and
operate on the inverter.
 Follow the instructions in "warning" during working. Physical injury or death
or serious property may occur.
 Only qualified electricians are allowed to wire. Damage to the inverter or
braking options and part may occur.
 Read carefully the instructions of brake resistors or units before connecting
them with the inverter.
 Do not connect the brake resistor with other terminals except for PB and (-).
Do not connect the brake unit with other terminals except for (+) and (-).
Damage to the inverter or braking circuit or fire may occur.
 Connect the brake resistor or brake unit with the inverter according to the
diagram. Incorrect wiring may cause damage to the inverter or other devices.
D.8.2 AC 3PH 380V(-15%)–440V(+10%)
The inverters ≤15kW have embedded brake units but the 18.5–30kW inverters support optional brake
units. Please select the brake resistor according to actual operation.
Model
Brake unit
Braking
resistance
at 100% of
braking
torque (Ω)
Brake resistor consumption power
(kW)
Min.
braking
resistance
(Ω)
Recommended
braking
resistance
Recommended
resistor power
10%
braking
usage
50%
braking
usage
80%
braking
usage
GD300L-004G-4
Embedded
122
0.6
3
4.8
80
122Ω
1200W
GD300L-5R5G-4
89
0.75
4.1
6.6
60
65Ω
1600W
GD300L-7R5G-4
65
1.1
5.6
9
47
50Ω
1600W
GD300L-011G-4
44
1.7
8.3
13.2
31
40Ω
4800W
GD300L-015G-4
32
2
11
18
23
32Ω
4800W
GD300L-018G-4
DBU-055-4
27
3
14
22
19
28Ω
6000W
GD300L-022G-4
22
3
17
26
17
20Ω
9600W
GD300L-030G-4
17
5
23
36
17
16Ω
9600W
Note:
 Select the resistor resistance and power of brake units based on the data provided by INVT.

INVT GD300L-1R5G-S2 Specifications

General

Brand	INVT
Model	GD300L-1R5G-S2
Category	Inverter
Language	English