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Combined Instrument Transformers .pdf  

36kV…245kV    JLD -series
245kV 170kV 145kV 123kV 72.5kV 36kV Combined instrument transformers,  Combined voltage current transformers CVCT.

Standards
Combined current voltage transformers are designed in accordance with IEC61869-4, ANSI(IEEE) C57.13, AS, BS, or other agreed standards.

Description
JLD—series Combined current voltage transformers, outdoor installation, oil immersed type, single phase, hermetically sealed, earthed, with high accuracy and protective class secondary windings. used for metering and relay protection in 36~245kV HV electric power T&D system. .
JLD consists of internal insulation parts, a porcelain or composite insulator, transformer oil, oil tank, metallic bellows. the secondary windings of CT are located on the top, the secondary windings of VT are located on the bottom. JLD- has 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 Characteristics
Highest system voltage: 36~245kV
Rated frequency: 50Hz or 60 Hz
Raetd primary current: 5~3000A
Rated secondary current: 1A or 5A
Accuracy class of the windings for CT measurement:
            0.15, 0.15S, 0.2S, 0.2, 0.3, 0.5S, 0.5, 0.6
Accuracy class of the windings for CT protect:
            5P, 10P, PR, PX, PS, C400, C800
            TPY, TPS, TPX, TPZ
No. of the secondary windings: 1~6
Rated output: 5~200VA
Security factor of the instrument (Fs): 5, 10
Rated short-time thermal current and dynamic stable current:
            Ith=31.5kA(1S); Idyn=80kA(peak) 
            Ith=50kA1S)； Idyn =125 kA (peak)
Rated secondary voltage：100V, 110V, 115V, 120V, 110/3V
                        100/√3V, 110/√3V, 115/√3V
Output of measurement<spa<