Available in sizes from 8 - 600 Amps
Advanced 2-stage filtering
Lightweight and compact
Common mode attenuation within critical 150KHz to 30MHz frequency range
Humidity range: 0 - 95% R.H.
100% tested for Hipot, Leakage Current, Ground Continuity and Component Value
Ambient temperature range: 0° C to 40°C (operating @ rated I)
AC Drives rely upon three phase RFI power line filters from TCI, because they provide effective EMC solutions up to 600A. RFI filters are integral components in power systems utilizing drives where high frequency noise should be held to a minimum. RFI Filtering would also benefit any application that utilizes sensitive electronic equipment that may be susceptible to interference, such as radios, computers, control devices, radar, sonar, etc. RFI filters will assist in system CE compliance. Some examples include airports, hospitals, factories with sophisticated automation equipment, pump stations, and commercial buildings.
Recent developments in power conversion devices like AC drives include increases in switching frequencies. The ultra-fast switching devices now used in drives enable greater efficiency, greater motor control and cost effective packaging. As switching frequencies increase so increase the effective edge frequencies produced and delivered to the line and load. Control of the emission of these frequencies is often a critical factor in a quality drive application. Manufacturers, integrators, sellers or users of drives may be required to comply with electromagnetic immunity standards such as the FCC 15 - Sub-part J, CE (CISPR 11) EMC directive and IEC 801-X. Conducted noise output (db uV).
KRF Series 3 Phase RFI Power Line Filters assist with cost effective compliance to EMC directives, in a compact, efficient and lightweight design. High common mode reduction in the critical 150kHz to 30MHz frequency range assures that the potential for interference from AC drives is reduced or eliminated.
RFI filters are current rated devices. Therefore, in order to apply one, you simply need to know the voltage and the full load amps of the drive with which it will be used (See NEC Table 430-150 for HP/Current calculations). No de-rating or re-rating is necessary when applying a KRF Series filter to a voltage that is equal to or less than its rated voltage.
Most electrical noise generated by AC drives is common mode noise. Hence, for peak filter performance, a low impedance, high frequency ground is essential. To obtain this type of grounding, a conductor wire composed of a high quantity of very fine strands must be used. Conductor wires of this nature include battery braid wire, ultra flexible welding cable, or Litz wire. Also, as high frequency electrical noise can radiate, input and output filter leads should be routed separately.
K-Series RFI Filters are available with convenient termination options. The last 2 letters of the part number determine the termination type. They are: QD=Quick disconnect, TB=Terminal block, PT=Pressure terminal, FL = Flying lead. See part number table for standard assignments.