... B) (1000 kv, 750, 550, 330, 220, 110, 66) series sleeve type current transformer, including TPS, TPY level transient protection sleevetype current ... GB/T20840-8.2007 standards,adopts the 'LPCT' + 'ROG' double sensors ,output by optical fiber digital ,Installation space is only ... 10 to 20% of the traditional transformer ,can be output by double configuration or more, adapt ...