Lenze DSD - Manual (Page 435)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
435
17 Restrictions of the drive dimensioning
17.14 Operation of inverters on the earth-leakage circuit breaker
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17.14 Operation of inverters on the earth-leakage circuit breaker
If an inverter is operated on an earth-leakage circuit breaker, a false tripping can occur due to capac-
itive earth leakage currents.
• This has to be observed in particular when earth-leakage circuit breakers with a fault current of
30 mA are used.
• In the case of earth-leakage circuit breakers with a fault current of 300 mA this is less critical,
however, it should be checked.
• Universal-current sensitive residual current circuit breakers may be used only.
• Further information on this can be found in the Application Knowledge Base.
17.15 Qualitative requirements with regard to the application
Currently the DSD does not check yet whether qualitative requirements with regard to the applica-
tion, like for example speed, torque, angle, and positioning accuracy, and the concentricity factor
and torque setting ranges can be implemented.
• This check is to be effected manually, if required.
17.16 System disturbances
When inverters are operated on the mains, low- and high-frequency system perturbations occur.
• The low-frequency system perturbations are limited by upstream mains chokes.
• The high-frequency system perturbations (EMC) are limited by upstream RFI filters of class C2
for industrial purposes, or C1 for residential areas.
• The dimensioning of these upstream elements currently is not integrated in the DSD yet and
has to be carried out via DSC or manually by means of the documentation for the respective de-
vice.

Note!
Only relevant for inverters which are to be connected to an earth-leakage circuit breaker.

Note!
Is valid only if accuracies have to be quantified!

Note!
Relevant for all applications!