Detecting device of three-phase power supply and application method of detecting device

Abstract

The invention discloses a detecting device of a three-phase power supply and an application method of the detecting device. The device comprises a phase sequence acquiring unit (2) and a controller (3), wherein the phase sequence acquiring unit (2) is matched with the three-phase power supply without a null line and used for using one phase in the three-phase power supply to acquire the current phase sequence of the other two phases, sequentially switched on according to preset phase angles, in the three-phase power supply; the controller (3) is matched with the phase sequence acquiring unit (2) and used for whether the current phase sequence is consistent with set phase sequence or not; if so, determining that the wiring of the three-phase power supply is correct; or if not, determining that the wiring of the three-phase power supply is incorrect. The detecting device has the advantages that the defects of detection inconvenience, low reliability and poor user experience in the prior art can be overcome, and detection convenience, high reliability and good user experience are achieved.

Description

technical field [0001] The invention belongs to the technical field of power supply detection, and in particular relates to a detection device for a three-phase power supply and a method for using the same, in particular to a phase sequence detection circuit for a three-phase AC power supply without a neutral line, and using the circuit to detect a three-phase AC power supply without a neutral line. Phase sequence detection method for phase AC power supply. Background technique [0002] The power supply consisting of three AC potentials with the same frequency, equal amplitude, and phase difference of 120 degrees is called a three-phase AC power supply. Domestic three-phase power supply (that is, three-phase AC power supply) generally has a neutral line, while the three-phase power supply provided by the machine tool to the oil cooler has no neutral line. When the three-phase power supply is connected to the oil cooler, in order to prevent the oil cooler from being burned d...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a three-phase power detection device and its use method in view of the above defects, so as to solve the problem of inconvenient detection caused by the neutral line of the three-phase power detection circuit in the prior art, and to achieve the convenience of detection. Effect

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