Braking System; Select The Braking Components - INVT Goodrive 300 Operation Manual

inverters
Goodrive300
Inverter
GD300-500G-4
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.
Goodrive300 series inverters below 30kW (including 30kW) need internal braking units and
the inverters above 37kW need external braking unit. Please select the resistence and
power of the braking resistors according to actual utilization.
Type Braking unit type
Input filter
FLT-P041000L-B
100% of
braking
294
FLT-L041000L-B
The cousumped power of the
braking resistor
Appendix D
Output filter
Mini
Braking