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Compact 3-line EMC filters reach 280A

Compact 3-line EMC filters reach 280A

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By Nick Flaherty



All 18 types in the EPCOS B84243 series are designed for a rated voltage of 530 V AC and performance of the filters has been optimised for the EN 61800−3:2004+A1:2011 standard for motor cable lengths of either up to 25 m (C1) or 50 m (C2).

The metal cases of the filters are designed with IP20 protection and, depending on the type, have compact dimensions of between 190 x 40 x 95 mm and 450 x 170 x 230 mm. Highly saturation resistant chokes allow parasitic asymmetric currents to be controlled for the longer motor cables.

A further advantage of the new B84243 series is the low leakage current that also permits operation in a 30 mA RCD environment. For smaller, hand-operated equipment the leakage current must be below 3.5 mA. For this reason, the 3-A version (B84243A8003U000) has been designed for a leakage current of 1.9 mA at 400 V AC. One important safety aspect is the short discharge time to <60 V within one second for the types rated at up to 44 A.

Typical applications of the new filters are frequency converters for the drives of elevators, pumps, conveyor systems, and HVAC systems.

www.epcos.com/emc_filters.

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