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HT903 accessory was designed for connection of multipurpose meter like GSC5x, HT9032, HT2020E on three phase systems trough external fixed CTs for high current measurements (over 3000A). The model, inserted inside a wood box, receive signals from CTs secondary with 1A or 5A ratio on its input terminals and transform it, with linear relationship, in a 1VAC output signals in way to connect the network analyzer inputs. HT903 is suited with all necessary set of cables for connection both external CTs and meters and it's according to EN61010-1 standard on CAT II 300V.
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