3

EMC/EMI Products

Schaffner Group

Datasheets

26 Nov 2020

Typical application

System diagram of an Active Front End (AFE) application

EMI

LCL

AFE

M

PE

W

V

U

U

V

W

PE

PE

VFD

Ig

Us

Filter

PE

PE

PE

PE

Frequency response

Frequency response at different values of the grid inductance. The grid inductance is calculated with details mentioned at each graph. Each figure represents the

normalized admittance transfer function between the grid current, ig, and the converter voltage us. At low frequencies, the equivalent admittance is inversely

proportional to the total DC resistance of the grid, and EMI and LCL filters (RGRID+REMI+RLCL), which is dominated mainly by the LCL filter RLCL.

FN3840-25-33-C35-R65

400 VAC/50 Hz, 250 kVA trafo with uk of (1) 1%, (2) 2%, (3) 3%, (4) 4%, (5) 5%

and 50m cable.

FN3840-50-53-C35-R65

400 VAC/50 Hz, 250 kVA trafo with uk of (1) 1%, (2) 2%, (3) 3%, (4) 4%, (5) 5%

and 50m cable.

FN3840-80-34-C45-R65

400 VAC/50 Hz, 250 kVA trafo with uk of (1) 1%, (2) 2%, (3) 3%, (4) 4%, (5) 5%

and 50m cable.

FN3840-160-40-C45-R65

400 VAC/50 Hz, 315 kVA trafo with uk of (1) 1%, (2) 2%, (3) 3%, (4) 4%, (5) 5%

and 50m cable.

FN3840-250-99-C2835-R67

400 VAC/50 Hz, 500 kVA trafo with uk of (1) 1%, (2) 2%, (3) 3%, (4) 4%, (5) 5%

and 50m cable.

FN3840-380-99-C2835-R67

400 VAC/50 Hz, 630 kVA trafo with uk of (1) 1%, (2) 2%, (3) 3%, (4) 4%, (5) 5%

and 50m cable.