Manual

Publication 2090-IN002B-EN-P — February 2006
300 W Active Shunt Regulator 9
ULTRA 100 Radiated
Emissions CE Compliance
In order for the ULTRA 100 drive to comply with the CE radiated
emissions standards, ferrites must be added to the ends of the twisted
dc bus wires when using an active shunt. Route both wires through
the ferrites. Ferrites with an impedance at 100 MHz between 100 to
200 Ω were found to be effective. The following table lists some
readily available ferrites with effective impedance ratings.
Figure 6
DC Bus Wiring Layout Using Ferrites with Shielded Cable
Ferrites for CE Radiated Emissions Compliance
Mfg. Part/No. D E Impedance
SS28B2034 0.250 0.120
125
Ω
SS28B2037 0.350 0.200
154 Ω
SS28B2032 0.500 0.200
230 Ω
Box-shaped ferrite assembly in fully enclosed
nylon case. End ports are surrounded with
flexible spring flutes to grip a range of cable
diameters from 3.2...12.7 mm (0.125...0.500 in.).
FerriShield, Inc.
350 Fifth Avenue, Suite 7310
New York, NY 10118-7591
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Adjust
Overtemp
DC Bus
Active
Active Shunt
2
2
• Place shunt in metal enclosure providing EMI noise
reduction.
• For ULTRA 100 drive only:
Install a 100 to 200 W ferrite RFI suppressor at both ends
of the dc bus wires to comply with CE radiated
emissions standard.
• Some drive terminals are marked R, S, and T instead of
U, V, and W.