KBRF-250, 9509 CE Approved AC Line Filter Attaches Under
KBRF-250, 9509 CE Approved AC Line Filter Attaches Under L-Bracket SCR Controls (Class A)
Model KBRF-250 is an RFI filter used to suppress
electronic interference caused by motor speed controls.
These controls utilize SCR’s or transistors that switch
on and off rapidly causing high frequency interference
pulses. These pulses are easily transmitted through
the AC power lines which can then enter other
equipment wired to the same line. In addition, once
the interference is allowed to conduct through the
power lines, the wires become radio antennas which
actually radiate electromagnetic energy through the
air. The energy, whether conducted or radiated, is
called Radio Frequency Interference (RFI) and is most
pronounced between .5MHz–1.5MHz, which is the AM
broadcast band. Although the interference is usually
not noticeable, except for static on an AM radio, it
could affect sensitive electronic equipment in some
instances. The KBRF-200A is an RFI filter which has
been designed to limit the interference to within
acceptable levels as determined by the CE Council
Directive 89/336/EEC relating to EMC. The unit is
compact in size (approx. 4.4" L x 2.9" W x 1.5" D) and
installs easily via quick-connect terminals. It is housed
in a plated steel case which is to be grounded via an
external ground screw or mounting tab. Complete
installation instructions are included.
