Abstract: This paper introduces a multi-channel electrical quantity detection device. The device uses the Atmega32 single-chip microcomputer as the core of the detection device. By detecting the current and voltage of the transformer, it determines whether the transformer has a short circuit fault. If the fault exists, it determines what kind of fault it is, such as three-phase short circuit, two-phase short circuit, two-phase short circuit to ground, and single-phase short circuit to ground. The device has a simple circuit structure, is easy to operate, and is easy to maintain.
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