High-current filters meet needs of large-scale PV inverters

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High-current filters meet needs of large-scale PV invertersWith large inverters finding increasing use in photovoltaics and wind energy systems, as well as in industrial applications and quick-charge stations for electric vehicles, Swiss company Schurter is expanding its FMER SOL DC filter range with a series for applications using three-phase AC.

Although of a compact, lightweight design, the new FMCC SOL high-performance filter series is designed for rated currents from 150 to 2500A at an ambient temperature of 50degC, making the devices suitable for increasingly powerful inverters that require filters on both the AC and DC sides.

Large-scale PV and wind energy systems need high-performance inverters that are designed for optimal energy efficiency. Yet modern inverters with MPP (maximum power point) trackers generate interference in both directions: on the AC grid side and the DC panel side. On the DC side, a filter in the FMER SOL series can be used for currents from 25 to 2300A. These are enhanced on the AC side with the new FMCC SOL high-current series for three-phase AC from 150 to 2500A. Filtering on both sides of the connection lines helps to meet common EMC standards.

FMCC SOL filters have UL approvals for ambient temperatures of +50degC as well as +40degC with higher rated current. They are approved for voltage ratings of 520V AC and 760V AC, the high voltage rating of 760V AC allowing their use in IT power grids.

The FMC SOL up to 250A is equipped standard with M10 screw connections and starting at 320A with copper bars. Other connection types (stranded wire or copper bars for current levels less than 320A) are available on request. In addition, customer modifications to the switching or the housing are also possible on request.



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