Determining External Regen Resistor Size, continued

Power

Dissipation

Calculation

Procedure,

continued

Drive Energy

Absorption

Capability

Step Action

8Compare 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 optional external Regen resistor must be chosen and installed. (See the Parts List appendix for a list of the available optional external Regen resistors.)

The drive energy absorption capability values (in joules) that are needed during the sizing calculations are provided in the following table.

Drive Energy Absorption Capability (joules)

Line Voltage

230 VAC

400 VAC

480 VAC

 

 

 

 

 

Drive

MHDS1004N00

5

19

23

Model

MHDS1008N00

 

 

 

Number

MHDS1017N00

 

 

 

 

MHDS1028N00

 

 

 

 

 

 

 

 

 

MHDS1056N00

10

38

47

 

 

 

 

 

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.)

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Schneider Electric 17S Series manual Determining External Regen Resistor Size, Number

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