New Schurter DC Filter FMER SOL

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Schurter presents its new standard DC filter series FMER SOL suited for use on the DC side of the inverter in photovoltaic systems and other DC systems.

Modern solar inverters, that use MPP (maximum power point) 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 normally 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, however, also put limits on the noise generated from lines not connected to the grid, such as for example the line to the solar panels. Meeting these limits can be achieved by using a DC filter on the DC side of the inverter.

Large solar inverters installed in electrical installations will generally require a cooling system. Components which provide high temperature resistance simplify the system and reduce the energy needed to cool. The FMER SOL filters are designed for rated currents from 25A to 1500A at 55°C ambient temperature, and voltages up to 1200VDC.  The filters are cURus and ENEC approved up to 75°C ambient temperature, with corresponding reduced rated currents.

The FMER SOL DC filters are designed with screw clamps for types up to 150A and copper bars for types upwards of 250A. Other types of connections, such as wires or copper bars <250A, are available on request.  Small adjustments can also be made to the electrical circuit or to the filter housing on request.

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Technical Data:
– Rated currents: 25A to 1500A at 55°C
– Operating voltage: up to 1200VDC
– Temperature range: -40°C to +100°C

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