SCHURTER (Santa Rosa, CA) presents its new 2300 A FMER SOL interference filter. In addition, the series is now offered without ground capacitors to safely prevent any leakage of current to ground. The series is designed for use on the DC side of the inverter in photovoltaic and other DC systems. Maximum Power Point (MPP) trackers generate disturbances into both the grid’s AC power line, as well as the DC side of the solar module. An AC filter is typically used on the grid’s AC power line, but the noise generated on the DC side tends to be overlooked. EMC standards EN 61000-6-3 and EN55014-1 also place strict limits on the noise generated downstream from the grid, such as the line to the solar panels. Using the FMER SOL DC filter on the DC side of the inverter ensures EMC compliance and overall reliability of the entire PV system. The FMER SOL filters are designed for rated currents from 25A to 2300A with a standard ambient temperature rating of 55°C. The series is also rated at 75°C ambient temperature up to 1200 VDC with corresponding current de-ratings.

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This article first appeared in the May, 2013 issue of Photonics Tech Briefs Magazine.

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