Goodrive35 inverters Appendix D
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Note:
1. The input EMI meet the requirement of C2 after adding input filters.
2. Above options are external, the customer should indicate when purchasing.
D.8 Braking system
D.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 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.
Goodrive35 series inverters below 30kW (including 30kW) need internal braking units and
the inverters above 37kW need external braking unit. Please select the resistance and
power of the braking resistors according to actual utilization.
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