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Oil Immersed CT Live tank type .pdf 1.2M
Oil immersed current transformer (Live tank type, Top head, Top core, Inverted type)
36kV…765kV LVB-series
765kV 550kV 525kV 420kV 362kV 300kV 245kV 170kV 145kV 123kV 72.5kV 52kV 36kV Oil immersed current transformer, Oil CT
Oil-immersed inverted tank current transformers is applied for metering and protect in 36~765kV High-voltage power transmission system.
——The features of the equipment omply with IEC 60044-1, IEC61869-2, IEEE/ANSI C57.13, CAS, AS and etc. standards.
——Modern and compact design,good insulation performance,high mechanical strength
——There are various options on output and accuracy class
——The most modern manufacturing technology on oil-paper-insulation manufacture
——Strict quality control and routine inspection
Main technical parameters
· Highest system voltage: 36~765kV
· Rated frequency: 50Hz or 60 Hz
· Polarity:Negative
· Raetd primary current: 5~5000A
· Rated secondary current: 1A or 5A
· Accuracy class of the windings for measurement: 0.15,0.2S, 0.2, 0.3,0.5S, 0.5
· Accuracy class of the windings for protect: 5P, 10P, 5PR, 10PR, TPY, TPS, TPX, TPZ, PX
· No. of the secondary windings: 1~8
· Rated output: 5~200VA
· Security factor of the instrument (Fs): 5, 10
· Accuracy limit coefficient:10,15,20,25,30,35,40, 50
· Accuracy limit conditions of the TPY class:
a. Symmetrical multiple of the short time current Kssc =20 or 25
b. Short circuit time constant of primary windings Tp -100ms
c. Direct Current Amount of short circuit current 100%(full migration)
d. Stipulated operating cycle
C-0.1S-O-0.5S-C-0.1S-O or C-0.1S-O-0.4S-C-0.1S-O
e. The guaranteed transient error time during reclosing:40ms or 50ms
f. Remanence coefficient≤0.1
750kV 500kV 400kV 330kV 275kV 230kV 220kV 161kV 150kV 138kV 132kV 115kV 110kV 88kV 69kV 66kV 63kV 46kV 33kV oil immersed current transformer, high voltage Current transformer HV oil CT