Velocity Edge GX440 Instructions d'exploitation télécharger pdf (Page 87)

100

101

Electrical installation

4.9 Other connections

Drive converter cabinet units

Operating Instructions, 10/2008, A5E00288214A

Duty cycles

            

33

'%

WV

3



3



3



3

'%

3

'%

3



 [3

'%

3



 [3

'%

3



 [3

'%













FRQWLQXRXVEUDNLQJSRZHU

3RZHUSHUPLVVLEOHHYHU\VIRUV

3RZHUSHUPLVVLEOHHYHU\VIRUV

3RZHUSHUPLVVLEOHHYHU\VIRUV

Figure 4-11 Duty cycles for the braking resistors

Threshold switch

The response threshold at which the braking unit is activated and the DC link voltage

generated during braking are specified in the following table.

Note

Since the braking energy is normally supplied back to the line and the braking chopper is

only to be activated in the event of a power failure, the default threshold value setting should

be retained rather than reduced.

WARNING

The threshold switch must only be used when the cabinet unit is switched off and the DC

link capacitors are discharged.

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 529 530

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Velocity Edge GX440 Instructions d'exploitation Page 87

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