Mains chokes
Mains chokes reduce the eects of the inverter on the supplying mains.
The switching operaons in the inverter cause high-frequency interferences that will be trans-
mied unltered to the supplying mains. Mains chokes smooth the steep and pulse-like
curves coming from the Inverter and make them more sinusoidal. Moreover, the eecve
mains current is reduced and thus energy is saved.
Mains chokes can be used without restricons in conjuncon with RFI lters.
Please note that the use of a mains choke reduces the mains voltage at the input of the inver-
ter. The typical voltage drop across the mains choke is around 4 % at its rated point.
Inverters from 22 kW must always be used together with mains chokes.
For operaon with the "Light Duty" load characterisc, inverters from 18.5 kW
(i550-C11/400-3) must always be used together with mains chokes.
The adapted assignment of these accessories and the technical data are provi-
ded with the devices.
Accessories
Mains chokes
245
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