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Calibration system for potential transformer

Calibration system for potential transformer

The system is used to apply AC voltage on voltage transformer and measure its error. They system is metal enclosure type. The step-up transformer and standard instrument transformer are integrated in one modular.

  •  
  • Application

    Thesystem is used to apply AC voltage on voltage transformer and measure itserror. They system is metal enclosure type. The step-up transformer andstandard instrument transformer are integrated in one modular.

    Thesystem is designed for sorts of potential transformers such as capacitive PT,electronic PT, electromagnetic PT.

    Features

    l  Easy transportation: thetotal height is less than 1.8mwhile transportation. It is able to go across bridges and tunnels.

    l  Easy operation: the systemcould be lifted or laid down with hydraulic pressure

    l  No need of connecting cables:since the exciter transformer, voltage regulator , reactor and standard voltagetransformer combine to one modular. The connecting cables between are avoided.

    l  Low noise: using high qualitycore, with special seismic reduction structure, the reactor brings very lownoise less than 60dB in operation.

    l  Good insulation performance:insulated by SF6, with relatively high safety factor. The system runs reliablyand safe.

    Technical parameters

    Model

    CXHJ-220

    CXHJ-330

    CXHJ-500

    CXHJ-750

    CXHJ-1000

    Rated  primary voltage Un, kV

    220/√3

    330/√3

    500/√3

    750/√3

    1000/√3

    Max  working voltage, kV

    1.1Un/1.2Un

    Rated  frequency, Hz

    50

    Rated  power factor

    1.0

    Short  time insulation level, kV

    1.2Un/1.3Un

    Capacitance range of test object, pF

    5000/10000

    Rated  secondary voltage, V

    100/√3

    Accuracy,%

    0.01/0.02/0.05

    Rated  output capacity, VA

    0.2/0.5

    Duty  cycle

    10min

    Annual  SF6 leakage

    ≤0.2%

    Weight,  kg

    500

    800

    3600

    4200

    7800

    Optional  components

    Lifting device, suitable for use in  substations site, lifting done via motor which makes the system easy for  transportation

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