ABB ACS2000 AFE 2MVA - Page 35

35 ACS2000 AFE 2MVA UM 3BHS355653 ZAB E01 REV. H
2.3.1 IFU - Input filter unit
The IFU (2-4: 3) is located between the input trans-
former and the AFE. The IFU is a tuned filter that
reduces harmonic voltages injected to the supply
network.
2.3.2 DTL compartment
The DTL compartment (2-4: 1) is present in drives
configured for direct-to-line connection. The func-
tions of the compartment are twofold:
• It smoothes the current harmonics in the power
supply.
• It decouples the common mode voltages of the
drive from the network.
—
References
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2-5 IFU - Input filter unit
—
2-5
AFE DC link
DC+
NP
DC-
U1
V1
W1
To NP
IFU
To INU