Lenze DSD Bedienungsanleitung PDF herunterladen (Seite 398)

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15 Results: comparing, optimising, logging

15.6 Reserves with regard to the drive dimensioning

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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23

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15.6.6 Reserves for brake resistors and brake choppers

Brake resistors are non-critical components, so that they don't immediately fail or are switched off

if the rated power is exceeded.

• If the rated power of the resistor is exceeded continuously, the temperature monitoring of the

resistor can be activated and switch off the system.

The brake choppers do not feature a current monitoring.

• The maximum permissible current can be exceeded by an incorrect assignment of the brake re-

sistor, which, however, is checked by the DSD.

• The continuous load limit of the brake chopper is also checked by the DSD.

 Danger!

Without a temperature monitoring on the resistor, the surface temperature can reach

impermissible values and possibly present an ignition source for combustible materials

close-by!

 Note!

Note that the dimensioning of this drive component defines the braking ability of the

drive train and should not be dimensioned too tightly.

With regard to the determined DC power, the DSD already allows for 10 % of reserves,

and also represents it as a requirement (incl. reserves).

The reserves for brake resistors/brake choppers should be at least 15 ... 25 %.

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