178
Determining External Regen Resistor Size, continued
Power
Dissipation
Calculation
Procedure,
continued
Drive Energy
Absorption
Capability
The drive energy absorption capability values (in joules) that are needed during the
sizing calculations are provided in the following table.
Note: Multiple drives can be interconnected via the DC-Link. When this is done, the
energy absorption capability of the drives and the continuous power ratings of the
Regen resistors are additive. The energy absorbed by the drives must be
calculated by superimposing all the time speed plots and calculating the energy
generated by each axis. (For calculating the power in complex multi-drive
applications contact Schneider Electric for assistance.)
Step Action
8 Compare the pulse power and the continuous power calculated with the ratings of
the internal Regen resistor in the drive. If either one is greater then an external
Regen resistor must be chosen and installed. (See the Parts List appendix for a list
of the available external Regen resistors.)
Drive Energy Absorption Capability (joules)
Line Voltage 230 VAC 400 VAC 480 VAC
Drive
Model
Number
MHDA1004
/
00
MHDA1008
/
00
MHDA1017
/
00
MHDA1028
/
00
51923
MHDA1056
/
00 10 38 47
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