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The paper presents an absolute measurement method of determining the voltage coefficient(VC) of high voltage capacitive dividers(CVD) by serial summation of voltage transformers. Under a series of double-voltages, by successively comparing a CVD with a full-insulated transformer, a semiinsulated transformer and their series, the VC of the CVD were gotten. The method was verified by using two voltage transformers rated with ( ) ( ) 110 3 kV 100 3 V in series. Index Terms -Current comparator, gas compressed capacitor, voltage coefficient，voltage ratio, voltage transformer.

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