Study on a Novel Fully Automatic Transformer Calibrator Overall Test Device

The existing transformer calibrator has many problems such as, low accurate, poor stability, error interference of frequency conversion, small range of working circuit, etc., this paper focus on those problems, adopting adjustment technology of rectangular coordinate system and polar coordinate system, automatic measurement feedback technology with high accurate, designs an adoptable digital program-control standard signal source with two channels of phase and amplitude, realizing automatic feedback of phase and amplitude after the frequency and load changing, realizing the automatic verification and calibration of transformer calibrator and PT secondary drop test instrument. The device designed in this paper has already passed the test of third-party detection mechanism, all of the technical indexes and function meet the demand.