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Three-phase unit control circuit and reverse phase protection state detection method thereof

A technology of unit control and detection method, which is applied in the direction of power supply testing, etc., can solve the problems of not being able to obtain the cause of the failure of the three-phase unit in time, and the inconvenience of failure repair, etc., and achieve the effect of improving the efficiency of failure repair

Inactive Publication Date: 2016-02-17
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0002] At present, the reverse phase protection of the three-phase unit uses the reverse phase protector as the switch. Since this can not be controlled by the program, the main board of the current three-phase unit usually has no reverse phase protection fault detection, so that the user cannot obtain the fault of the three-phase unit in time. cause, it is not convenient to repair the fault

Method used

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  • Three-phase unit control circuit and reverse phase protection state detection method thereof
  • Three-phase unit control circuit and reverse phase protection state detection method thereof
  • Three-phase unit control circuit and reverse phase protection state detection method thereof

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0022] see in conjunction Figures 1 to 3 As shown, according to the embodiment of the present invention, the three-phase unit control circuit includes: a compressor 1, which is connected to the three-phase power supply 3 through an AC contactor 2; a reverse phase protector 4, which is arranged between the compressor 1 and the three-phase power supply 3 On the three-phase circuit between, it is used to detect the phase sequence of the three-phase power supply 3; the main board 5 is connected to the reverse phase protector 4 to obtain the state of the reverse phase protector 4, and Control the power supply of the AC contactor 2; the display device is connected to the main board 5 and displays the state of the reverse phase protector 4.

[0023] When the three-phase group control circui...

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Abstract

The invention discloses a three-phase unit control circuit and a reverse phase protection state detection method thereof. The three-phase unit control circuit comprises a compressor (1), a reverse phase protector (4), a mainboard (5) and a display device, wherein the compressor (1) is connected with a three-phase power supply (3) by virtue of an alternating current contactor (2); the reverse phase protector (4) is arranged on a three-phase circuit between the compressor (1) and the three-phase power supply (3) and is used for detecting phase sequence of the three-phase power supply (3); the mainboard (5) is connected to the reverse phase protector (4) so as to acquire a state of the reverse phase protector (4) and controls power supply of the alternating current contactor (2) according to the state of the reverse phase protector (4); the display device is connected to the mainboard (5) and displays the state of the reverse phase protector (4). According to the three-phase unit control circuit disclosed by the invention, three-phase unit failure caused by phase sequence errors can be timely detected, and the failure repair efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of unit phase sequence protection, in particular to a three-phase unit control circuit and a detection method for reverse phase protection status thereof. Background technique [0002] At present, the reverse phase protection of the three-phase unit uses the reverse phase protector as the switch. Since this can not be controlled by the program, the main board of the current three-phase unit usually has no reverse phase protection fault detection, so that the user cannot obtain the fault of the three-phase unit in time. The reason is that it is not convenient to repair the fault. Contents of the invention [0003] Embodiments of the present invention provide a three-phase unit control circuit and a reverse-phase protection state detection method thereof, which can detect failures of the three-phase unit caused by phase sequence errors in time, and improve fault repair efficiency. [0004] In order to achie...

Claims

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Application Information

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IPC IPC(8): G01R31/42
CPCG01R31/42
Inventor 莫灼均胡知耀何彬荣梁郁龙熊俊峰徐喆李文滔李健成蒿兴鹏
Owner GREE ELECTRIC APPLIANCES INC
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