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BS EN 50482-2008 pdf download.INstrument transformers Three-phase inductive voltage transformers having Um up to 52 kV. Unless otherwise specified below the temperature rise of a voltage transformer at the specified voltage, at the rated frequency and at...

BS EN 61869-2-2012 pdf download.Instrument transformers Part 2 : Additional requirements for current transformers. To minimise the effects of variation of cooling-air temperature, particularly during the last test period, appropriate means should be used for the temperature...