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CT PT Unit

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  1. current transformers and voltage transformers

    Guaranteed Technical particulars of 33 KV Outdoor Oil Immersed Pole Mounted Type Combined CT-PT Metering Units.Si no. Technical Particulars Details 1 Name of manufacturer 2 Type of equipment Outdoor, oil immersed 3 Nominal System Voltage 33 KV 4 Highest system Voltage 36 KV A Current Transformer i Type Paper insulated oil immersed ii CT Ratio 20/5A, 25/5A 50/5A & 75/5A iii Accuracy Class 0.5S iv Rated Output 10 VA v Insulation level 36/70 KV /170KVP vi Continuous thermal current rating 120 % of rated primary current vii Short time thermal current rating for one second. 13.1KA/1 Sec viii Dynamic Current Rating 32.75 KAP B Potential Transformer i Type Paper insulated oil immersed ii PT Ratio 33 KV/110V iii Rated Output VA/ Phase 30 VA iv Class of accuracy 0.5 v Insulation level 36/70 KV /170KVP vi Winding connection Star/Star vii Rated Voltage factor & duration 1.2 times continuously & 1.5 times for 30 sec viii H.V. star neutral connection Floating 5. Dimension of MS Tank a Height ( mm)b Breadth (mm)c Length (mm)6. Weight of core and winding A Current Transformer i Core weight ii Primary winding copper weight iii Secondary winding copper weight B Potential Transformer i Core weight ii Primary winding copper weight iii Secondary winding copper weight 7. Weight of oil 8. Total weight of complete metering unit including all accessories 9 Maximum winding temp.(Ambient air temperature shall be taken as 45° C 45°C(max.)11 Minimum phase to phase distance 430 mm Shortest distance between metal part & earth 380 mm 12 Make and type of HV bushing Genesis, CJI, and other reputed make Creepage distance of HV bushing 900 mm (min.)13 Gauge of MS tank Thickness of Bottom and top cover 5 mm Thickness of side 3 mm 14 Type of Core material CRGO 15 33 KV CT a Nos of Turn i Primary winding ii Secondary winding b Winding Material i Primary winding Copper ii Secondary winding Copper 16 33 KV PT a Nos of Turn i Primary winding ii Secondary winding b Winding Material i Primary winding Copper ii Secondary winding Copper 17 Method of identification of i Primary terminal Engraved Aluminium label ii Secondary terminal Engraved Aluminium label iii CTs Engraved Aluminium label iv PT Engraved Aluminium label 18 Size of material of i Primary studs 16 mm (Copper Tin plated)ii Secondary studs 6 mm (Brass nickel plated)
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