Delta ASDA-A3 Series User Manual page 37

Installation
When the regenerative energy exceeds the capacity of built-in regenerative resistor, you should
use an external regenerative resistor. Please pay special attention to the following when using
2
an external regenerative resistor.
1. Please choose the correct resistance (P1.052) and capacity (P1.053) for the regenerative
resistor; otherwise it might influence the performance.
2. When using an external regenerative resistor, please note that its resistance must be greater
than the resistance of the built-in regenerative resistor. For general application, you can
connect more than one resistor in series. If the value (from resistors connected in series)
exceeds the rated range, you can reduce the value by connecting the resistor in parallel.
If you want to connect the resistors in parallel to increase the power of the regenerative
resistor, please make sure the capacitance meets the requirements.
See the following diagram and settings for connecting the regenerative resistors in serial and
parallel.
3. Normally, if the capacity of the regenerative resistor (the average value) is within the rated
capacity, the temperature of the resistor can increase to 120°C or even higher (under the
condition that the regenerative energy continues to function). For safety reasons, please use
forced cooling in order to reduce the temperature of the regenerative resistor. Alternatively,
you can use regenerative resistors that are equipped with thermal switches. Please contact
your distributor for the load characteristics of the regenerative resistor.
2-14
Connect to one external
regenerative resistor
P3
1 kW, 10Ω
C
Connect to external regenerative
resistors (serial connection)
P3
1 kW, 10Ω
1 kW, 10Ω
C
Connect to external regenerative
resistors (parallel connection )
P3
1 kW, 10Ω 1 kW, 10Ω
C
Settings:
P1.052 = 10 (Ω)
P1.053 = 1000 (W)
Settings:
P1.052 = 20 (Ω)
P1.053 = 2000 (W)
Settings:
P1.052 = 5 (Ω)
P1.053 = 2000 (W)
ASDA-A3
Revision December, 2017