High-current DC interference filter

High-current DC interference filterSCHURTER presents its 2300 A FMER SOL interference filter. Designed for use on the DC side of the inverter in PV and other DC systems, the new series is offered without ground capacitors to safely prevent any leakage of current to ground. Usually, maximum power point (MPP) trackers generate disturbances into 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, as well as overall reliability of the entire PV system.

Large solar inverters exposed to high-temperature operating environments also tend to require a cooling system. The FMER SOL provides high-temperature resistance to simplify the system and reduce the energy needed to cool. Accordingly, the FMER SOL filters are designed for rated currents from 25 A to 2300 A, with a standard ambient temperature rating of 55° C (131° F). The series is also rated at 75° C (167° F) ambient temperature up to 1200 VDC, with corresponding current de-ratings.

SCHURTER
www.schurterinc.com/new_emc
 


Volume: March/April 2013