Standard voltage ratio device for online error correction for voltage transformer and operation method
A voltage transformer and standard voltage technology, applied in the field of standard voltage proportional devices, can solve the problems of time-consuming and laborious, inability to obtain real data of three-phase live voltage, huge workload of offline error characteristic detection, etc.
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[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0034] The present invention provides a standard voltage proportional device for on-line error calibration of voltage transformers based on inverted current transformers. After the grounding wire of the end screen of the inverted current transformer is untied, it is connected to a low-voltage standard capacitor circuit, and the high voltage formed by the equipment itself Capacitor combination voltage divider; a standard voltage transformer is used to calibrate the standard voltage proportional device provided by the present invent...
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