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LVQB SF6 Gas Insulation Combined Transformers


The combined transformer is for the current and voltage measuring and protection for the power systems.

Rated voltage: 40.5kV~550 kV

Rated primary current: 50~8000A

Rated secondary current: 1A, 2A, 5A

The accuracy classes for CT: 0.2S, 0.2, 0.5S, 0.5, 5P, 10P, PX, PR, TPY, TPZ  (GB, IEC standards), or 0.15, 0.3, C (IEEE standard)

Maximum output for CT: 50VA (GB, IEC standards), or B-1.8, C800 (IEEE standard)

Rated frequency: 50Hz or 60Hz

The accuracy classes for VT: 0.2, 0.5, 3P (GB, IEC standards), or 0.15, 0.3 (IEEE standard)

Maximum output for VT: 500 VA (GB, IEC standards) or ZZ (IEEE standard)

Partial discharge: <5pC

The bushing is made by silicon rubber or porcelain

The enclosure is made by aluminum alloy casted, there is SF6 density monitor to monitor the gas pressure, and with a pressure relief device, the produce is very safe. The insulation material is SF6 gas, the leakage not exceed 0.1%/year. The partial discharge less than 5 PC.

The product service life is very long , more than 30 years even get to 40 years and do not need any special maintenance. Our technology has reached the international leading level.

Standards: GB/T 20840.1, GB/T 20840.4, IEC 61869-1, IEC 61869-4, IEEE C57.13