Emc C3 Filters; Braking System - Salicru CV50-008-4F User Manual

C.8 EMC C3 Filters
CV50 inverters have an embedded C3 filter which can be disconnected by jumper J10, as shown below:
C.9 Braking system
C.9.1 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 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 braking resistors or units
before connecting them with the inverter.
 Do not connect the braking resistor with other terminals except for PB and (-). Do not
connect the braking unit with other terminals except for (+) and (-). Damage to the
inverter or braking circuit or fire may occur.
 Connect the braking resistor or braking unit with the inverter according to the
diagram. Incorrect wiring may cause damage to the inverter or other devices.
CV50 inverters≤30 kW have internal braking unit and the inverters ≥37kW need external braking unit.
Please select the resistance and power of the braking resistors according to actual utilization.
Note:
Select the resistor and power according to the provided data.
The braking torque may increase because of the raising of braking resistor. The below table is calculated at 100% of the
braking torque, 10%, 50% and 80% of the braking usage ratio. The user can select according to the actual working.
Refer to the operation instructions of braking units when using external units for right setting of voltage degree.
Otherwise normal operation of the inverter may be impacted.
138 - 144 Peripheral Options and Parts Appendix C