NORD Drivesystems BU0180 - Manual (Page 28)

SK 180E Manual for frequency inverters
28 Pre-series version BU 0180 GB-0914
2.4 Overvoltage filter SK CIF
The use of a suitable ("CSA-") overvoltage filter is mandatory (see also Section 1.5) in order to comply with
cUL requirements. For 230V devices, operation of the frequency inverter with a suitable overvoltage filter is
only permissible if a mains choke is used in addition.
For further information about the overvoltage filter, please refer to the relevant data sheet. These data
sheets can be downloaded at
www.nord.com .
Inverter ID Filter type Data sheet
SK 1x0E-250-323-A … SK 1x0E-111-323-A*
SK CIF-323-20
(alternatively SK CIF-323-40)
TI 030 276997070
(TI 030 276997071)
SK 1x0E-250-340-A … SK 1x0E-221-340-A
SK CIF-340-30
(alternatively SK CIF-340-60)
TI 030 276997080
(TI 030 276997081)
* (only with suitable mains choke)
Without an overvoltage filter, frequency inverters for 1~ 115V mains (SK1x0E-xxx-112-O) cannot be
approved according to cUL.
CAUTION!
Modules SK CIF-323-x0 may only be used in combination with a suitable mains choke
(L
min
= 3 x 0,73 mH) (see connection diagram).
For SK CIF-340-x0 modules the use of a mains input choke is not mandatory, but is recommended.
Note
With the use of a mains choke, the effective input currents of the 1~ 230V frequency inverter reduce
to approximately the values of the output currents. Several frequency inverters can be connected to
a choke - filter combination. In this case, the total input currents must not exceed the current rating
of the filter.