Braking Components - Salicru CV30 User Manual

C.8 Braking system
C.8.1 Select the braking components
It is appropriate to use braking resistor or braking 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 braking 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 braking resistors or
units before connecting them with the inverter.
 Do not connect the braking resistor with other terminals except for PB and (-).
Damage to the inverter or braking circuit or fire may occur.
 Connect the braking resistor with the inverter according to the diagram. Incorrect
wiring may cause damage to the inverter or other devices.
CV30 inverters have internal braking units.
Model
CV30-004-S2
CV30-008-S2
CV30-015-S2
CV30-022-S2
CV30-004-2
CV30-008-2
CV30-015-2F
CV30-022-2F
CV30-040-2F
CV30-055-2F
CV30-075-2F
CV30-008-4
CV30-015-4
Appendix C Peripheral Options and Parts
Braking
The consumed power of the braking resistor
resistor at
100% of
10% braking
the braking
torque (Ω)
361 0.06
192 0.11
96 0.23
65 0.33
361 0.06
192 0.11
96 0.23
65 0.33
36 0.6
26 0.75
19 1.13
653 0.11
326 0.23
50% braking 80% braking
0.30 0.48
0.56 0.90
1.10 1.80
1.70 2.64
0.3 0.48
0.56 0.9
1.1 1.8
1.7 2.64
3 4.8
4.13 6.6
5.63
0.56 0.90
1.13 1.80
Min.
braking
resistor
(Ω)
42
42
30
21
131
93
44
44
33
25
9 13
240
170
137 - 140