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Alternating current three-phase self-adjusting phase sequence device

A self-adjusting, phase-sequence technology, which is applied to automatic disconnection emergency protection devices, circuit devices, phase sequence/synchronization indications, etc., can solve high and low temperature performance and environmental adaptability, hidden dangers of personnel and equipment safety, and equipment Abnormal operation and other problems, to achieve the effect of light weight, simple structure and wide application range

Inactive Publication Date: 2016-09-28
合肥天鹅制冷科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, if there is a phase sequence problem in the electrical equipment and no phase sequence protection is installed, such as the rotor type or scroll compressor of the air conditioner or the indoor and outdoor fans, the phase sequence of the power supply is reversed, which may cause abnormal operation of the equipment, or serious long-term operation. Finally, the load of the unit will be burned, which will cause major hidden dangers to the safety of personnel and equipment.
[0003] There is an integrated power detector with automatic phase change, but it is expensive, especially when it is used on military electrical equipment, it is not suitable for high and low temperature performance and environmental adaptability

Method used

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  • Alternating current three-phase self-adjusting phase sequence device

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Embodiment Construction

[0016] see figure 1 , an AC three-phase self-adjusting phase sequence device, including reverse phase loss protector ABJ, first and second AC contactors KM1, KM2, time relay KT, terminal XT and load MC, the upper end of the first AC contactor KM1 The 1L1, 3L2, 5L3 phases of the second AC contactor KM2 on the one hand are respectively connected to the 1L1, 3L2, 5L3 phases on the upper end of the second AC contactor KM2, and on the other hand are connected to the L1, L2, L3 terminals of the terminal XT respectively. The first AC On the one hand, the 2T1, 4T2, and 6T3 phases at the lower end of the contactor KM1 are respectively connected to the 6T3, 4T2, and 2T1 phases at the lower end of the second AC contactor KM2, and on the other hand, they are respectively connected to the power input terminals of the load MC; The power input terminals of the protector ABJ are respectively connected to the terminals L1, L2 and L3 of the terminal XT;

[0017] On the one hand, the normally c...

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Abstract

The invention discloses an alternating current three-phase self-adjusting phase sequence device which comprises an inverse phase-failure protector ABJ, first and second alternating current contactors KM1 and KM2, a time relay KT, a wiring terminal XT and a load MC. According to the invention, when a power supply end has an accident and phase sequence is suddenly changed, electrical equipment can instantly automatically adjust the phase sequence rather than simply carry out protection alarm; in unattended electrical equipment, the equipment can conveniently automatically change the phase sequence to return to an electrical structure of initial phase sequence; and the device is stable and reliable, and can be conveniently and widely used in any electrical equipment with the requirement.

Description

technical field [0001] The invention relates to the technical field of air conditioners and electromechanical equipment requiring three-phase phase sequence self-adjustment, in particular to an AC three-phase self-adjustment phase sequence device. Background technique [0002] For three-phase AC electrical equipment such as air conditioners, many load terminals have strict requirements on phase sequence. If a phase sequence protector is added to the electrical system, the unit will be protected as a whole during the initial operation of the equipment or after the phase sequence is changed, and cannot operate normally, and an alarm will be reported, waiting for personnel to manually judge and deal with the fault. However, if there is a phase sequence problem in the electrical equipment and no phase sequence protection is installed, such as the rotor type or scroll compressor of the air conditioner or the indoor and outdoor fans, the phase sequence of the power supply is rever...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/38G01R29/18
CPCG01R29/18H02H3/38
Inventor 董军汪长江
Owner 合肥天鹅制冷科技有限公司
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