Introduction to EMI/RFI Filters
Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI) are common issues in power electronics, particularly with Variable Frequency Drives (VFDs). These interferences can affect communication links, control signals, and various electronic systems.

Sources of EMI
Power switching devices are primary sources of EMI due to their high-speed operations. The common mode high-frequency noise is a significant problem, often expressed as I = c dv/dt.

Applications of EMI/RFI Filters
EMI/RFI filters are used in various applications including computers, radio controls, automatic lighting, telecommunications, and factory automation. They help in meeting EMC directives and solving high-frequency interference problems.

Features of MTE RFI/EMI Filters
MTE filters block high-frequency electrical noise and are designed to have minimal panel space requirements. They are effective in reducing interference and have a large installed base.

EMI Mitigation Techniques
Effective wiring practices such as shielding power cables and separating power and control lines are recommended. MTE offers motor sine wave filters to further mitigate EMI.

Performance and Standards
The insertion loss of RFI/EMI filters is a critical parameter, with typical common mode insertion loss values provided for various frequencies. MTE filters meet both European EMC Directive and FCC limits for different frequency ranges.

Product Specifications
The MTE 'RF' series filters are UL approved and CE marked, available in various current ratings and voltages. They feature fingersafe terminals and are stocked for immediate delivery.

Selection and Installation
Filters should be installed on the VFD input, sized for total RMS current, and connected in parallel for higher current ratings. MTE provides a global delivery system with high current ratings and low installed costs.