EMI Knowledge Base
Practical reads on how EMI power line filters work, their key performance parameters, and how to select them — covering single-phase, three-phase and three-phase + neutral filters to help your equipment pass EMC testing first time.
Conducted EMI/RFI is a common reason equipment fails EMC certification. Understand common-/differential-mode noise and how DLC filters attenuate it to keep your drive within emission limits.
Match the DLC filter's WF model to your drive's input current (A) and output power (kW): single-phase S series 10–35 A, three-phase T series 6–990 A, three-phase + neutral TN series 6–170 A.
WELLEMC DLC power line filters suppress conducted EMI/RFI on the AC supply of single- and three-phase equipment. 29 WF models, book-style compact housing, help meet IEC/EN 61000-6-2 and 6-4.
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WELLEMC DLC three-phase power line filters suppress conducted EMI/RFI on the AC mains of three-phase equipment. Compact book-style housing; the WF-T series spans 6–990 A across 16 models (WF-T6-C to WF-T990-C). Helps equipment meet IEC/EN 61000-6-2 and 6-4. Ideal for VFDs, servo drives, industrial automation, robotics and power conversion.
WELLEMC DLC single-phase power line filters suppress conducted EMI/RFI at the AC inlet of single-phase equipment. Compact book-style housing; the WF-S series covers 10–35 A (0.75–3.7 kW): WF-S10-C, WF-S15-C, WF-S20-C, WF-S35-C. Helps equipment meet IEC/EN 61000-6-2 and 6-4. Ideal for VFDs, servo drives, test equipment, industrial controls and medical devices.
WELLEMC DLC three-phase-plus-neutral power line filters suppress conducted EMI/RFI on the 3-phase+neutral mains of mixed and unbalanced loads. Compact book-style housing; the WF-TN series spans 6–170 A across 9 models (WF-TN6-C to WF-TN170-C). Helps equipment meet IEC/EN 61000-6-2 and 6-4. Ideal for medical IT systems, industrial automation, HVAC, lifts and power conversion with neutral currents.