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400kV 50pF Reference Capacitor

Performance

Standard capacitor is used as comparison reference, which is assorted to precise measurement to

inductance value, loss, capacitance, and dielectric loss value of HV equipment such as reactor,

cable, transformer, sleeve, and capacitors etc. The standard capacitor is equipped with HV pole

which can be connected with other HV parts in HV measuring circuit without partial discharge.

Standard capacitor is designed for indoor application, movable.

For extra high voltage, discrete capacitor grading is used to realize linear distribution of electric field,

so as to maintain an ambient humidity above 95% (without condensate water). Standard capacitor

has high voltage endurance and extremely stable humidity and voltage factor.


Product Description

Application conditions:

  • RH: <80%

  • Ambient T: -5~+40℃

  • Altitude: <1000 m

  • Rated voltage 400kV

  • Withstand voltage: 440kV

  • Rated frequency: 50Hz

  • Capacitance: 50pF

  • Capacitance stability: <1%/year

  • Capacitance value accuracy: ±0.05%

  • SF6 working pressure: 450±50KPa

  • Capacitor tanδ: <5X10-5 (rated voltage & frequency, 20℃)

  • Capacitance pressure factor absolute value: ≤2.2×10-3/0.1Mpa

  • Capacitance voltage factor absolute value: ≤3×10-5

  • Capacitance temperature factor absolute value: ≤3×10-5/℃

  • Capacitor shall bear 2Xrated air pressure test/72h.

  • Sealing: ≤1% leakage rate/y

  • Electric safety protection: LV pole overpotential protection

  • Gas standard capacitor installation dimension:

  • Base plate: 1650mm*1650

  • Height: 3600mm

  • Weight: <980kg


Complete supply:

  • Standard capacitor: 1set

  • Exclusive grading ring: 1piece

  • Exclusive measuring cable: 1piece

  • Junction box: 1piece

  • Factory inspection report: 1copy

  • Certificate: 1copy

  • Technical manual: 2copies

  • 0.05% measurement bridge 1 set (new add).


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