The connection filter is designed to provide (together with the communication capacitor) resistance matching when connecting the equipment of high-frequency channels of relay protection, emergency automation and telephone communication to the phase of overhead power lines with voltage of 6 - 1150 kV and to lightning protection cables of overhead power lines.ConstructionElements of the filter are placed in the case made of silumin and closed by aluminium cover with sealing rubber gasket, connected with each other by non-drop-out bolts made of brass. On the bottom wall of the case there is a funnel for coaxial cable input and a ventilation device.Climatic execution of the filter - UHL, placement category - 1 according to GOST 15150, seismic resistance according to MSK64 scale - 9 points.AdvantagesIn case of necessity the filters of connection are made: with the possibility of phase rotation by 180; with two-band tuning; for organisation of HF channel according to the scheme of phase-phase, FP can be made with built-in differential transformer
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