Gas insulation current transformers, High voltage current transformer, gas insulation current transformer, SF6 CT
Classification :
Keywords:
SANDIAN ELECTRIC
- 产品描述
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- Commodity name: Gas insulation current transformers, High voltage current transformer, gas insulation current transformer, SF6 CT
The current transformer is SF6 gas insulation, inverted frame, with the top of T type aluminum case which there are secondary winding(s) and primary winding(s) inside.
36-,550kVgas insulationcurrent transformers LVQB- series
The current transformer is SF6 gas insulation, inverted frame, with the top of T type aluminum case which there are secondary winding(s) and primary winding(s) inside. The bushing is composite materials with silicon rubber umbrellas or high strength porcelain. The secondary terminal leads which through the metal tube are connected with the secondary terminals box which at the base. There is a pressure relief device at the top of the case, when the pressure is more than 0.65MPa (0.8MPa only for 500 kV) if the current transformer is discharge inside, the relief device will be broken to release the pressure and send an alarm information. There is a SF6 density monitor fix at the base, it can indicate the SF6 pressure which inside the current transformer (its indicated value is the SF6 pressure at 20℃), and it will provide an information when the SF6 pressure is drop down to the minimum service pressure of the current transformer, to remind the user replenish the SF6 gas to the rated pressure.
Main Technical parameters
• Standards: IEC61869-2, ANSI(IEEE)C57.13, AS,BS ,IS and etc
• Highest system voltage: 36~550kV
• Rated power frequency: 50Hzor60 Hz
• Polarity：Negative
• Rated primary current: Up to 8000A
• Rated secondary current: 1A or 5A
• Primary continuous current: 1.2~2.0Uncontinuous
• No. of the secondary windings: 1~8
• Accuracy class of the windings for measurement: IEC CL0.15, 0.2S, 0.2, 0.5S, 0.5, 1, ANSI 0.15S, 0.15
• Accuracy class of the windings for protect: 5P, 10P, 5PR, 10PR,PS, C400,C800,TPY, TPS, TPX, TPZ, PX
• Rated output: 5~200VA,others on request
• Security factor of the instrument (Fs):5, 10
• Short-time thermal current and dynamic stable current:
36~72.5kV :Ith=31.5kA( 3s); Idyn=80kA (peak)
123~765kV: Ith=40-63kA (3s); Idyn=100~160kA (peak)
• Partial discharge:≤3pC under the voltage 1.2Um/√3
• The dielectric loss factor:≤0.005 (10kV and um/√3)
• Temperature rise limit: ≤60K
• Annual leakage: ≤0.1%
• SF6 moisture content: ≤100×10-6(V/V)
• Ambient temperature:-40~+50°C
• Altitude: Standard design is less than 2000mOr highervalues onrequest
• Creepage distance ratio:25 or 31(mm/kV)
• Earthquake standard design: up to 0.3g
500kV 400kV 345(330)kV 275kV 230kV 220kV 161kV 150kV 138kV 132kV 115kV 110kV 88kV 69kV 66kV 63kV 46kV 33kV High voltage SF6 gas insulated current transformer, high voltage Current transformer HV SF6 CT.
SANDIAN 124 Nos 145kV SF6 CTs operating at KE, Pakistan
SANDIAN 24 Nos 420kV SF6 CTs operating at Jhajjar Power Plant, India
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SANDIAN Industry Park, Liling, Hunan, P.R. China
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