Omron RX Series - Regenerative Braking Unit and Braking Resistor Combination Selection Table

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High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
12-4 Regenerative Braking Unit and Braking
Resistor Combination Selection Table
Select the combination of the regenerative braking unit(s) and the braking resistor(s) as follows,
according to your inverter.
If the usage rate exceeds 10% ED, or if you need a torque larger than the approximate braking torque,
you need to follow the instruction provided in Braking Resistor Selection on page A-8.
• Inverter:
Select the model of your inverter.
However, the table below assumes that your inverter is used in the heavy load mode and connected
to a single motor with the same capacity.
Therefore, in the light load mode, a motor with the same capacity means a motor that is one size
larger in capacity than the inverter and the converted braking torque decreases accordingly.
• Operating conditions:
Show the torque during deceleration and the deceleration time (in % ED) calculated as a percentage
of the cycle time for 1 cycle of operation including the stop time.
• Braking unit/Breaking resistor:
Show the required model and number of units.
• Connection form:
Shows the configuration of the regenerative braking unit(s) and braking resistor(s) illustrated in the
connection form table below.
• Restrictions:
Show the maximum deceleration time allowable for the combination shown here and the minimum
resistance that can be connected to the inverter’s built-in regenerative braking circuit or external
regenerative braking unit(s).
Inverter
Operating
conditions
Braking unit Breaking resistor
Connection
form
Restrictions
Voltage
class
Max.
applicable
motor
capacity
[kW]
Model
%ED
[%]
Approximate
braking
torque [%]
Model
No.
of
units
Model
No.
of
units
Allowable
continuous
ON time [s]
Min.
connection
resistance
[
Ω ]
200-V
class
0.4
3G3RX-
A2004-V1
3% 220%
Built into
unit
–
3G3AX-
RBA1201
1 1 20 50
10.0% 220% –
3G3AX-
RBB2001
1 1 30 50
0.75
3G3RX-
A2007-V1
3.0% 120%
Built into
unit
–
3G3AX-
RBA1201
1 1 20 50
10.0% 120% –
3G3AX-
RBB2001
1 1 30 50
1.5
3G3RX-
A2015-V1
2.5% 110%
Built into
unit
–
3G3AX-
RBA1202
1 1 12 35
10.0% 215% –
3G3AX-
RBC4001
1 1 10 35
2.2
3G3RX-
A2022-V1
3.0% 150%
Built into
unit
–
3G3AX-
RBB3001
1 1 30 35
10.0% 150% –
3G3AX-
RBC4001
1 1 10 35