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Random phase-lacking protection device

A phase loss protection, phase line technology, applied in emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., can solve the problems of no phase loss protection function, many current specifications, and inconvenient wiring. , to avoid power supply disputes and complaints risks, improve power service level, and improve power supply quality.

Inactive Publication Date: 2017-01-04
国网河南孟津县供电公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the AC contactors used generally only have a simple on-off function, but do not have a phase loss protection function. Once a phase loss occurs during operation, it is very easy to cause the consequence of burning the motor.
The usual solution is to separately assemble a protective product in the control circuit for phase loss protection, which not only has the disadvantages of taking up a lot of space, inconvenient wiring, relatively large power consumption, and high cost, but also many Adopting the current type protection method, there are many disadvantages such as many classifications of current specifications, poor stability and reliability, and poor circuit versatility of similar products.

Method used

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  • Random phase-lacking protection device

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Embodiment Construction

[0009] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0010] Such as figure 1 As shown, an arbitrary phase loss protection device includes an AC contactor, a second attracting coil 1 is connected to the attracting coil 2 of the AC contactor, and one end of the second attracting coil 1 is connected to one end of the attracting coil 2 of the AC contactor And be electrically connected with one of the phases of the three-phase line, the other end of the second attraction coil 1 and the other end of the AC contactor attraction coil 2 are respectively connected to the other two phases; between one end of the second attraction coil and the phase line connected to it A start button is connected, and a self-locking contact 4 is connected in parallel on the start button; a conversion contact 5 and a main contact 6 are connected in series between the other end of the AC contactor ...

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Abstract

The invention discloses a random phase-lacking protection device, which comprises an alternating-current contactor, wherein a second attraction coil is connected with an attraction coil of the alternating-current contactor, one end of the second attraction coil is electrically connected with one phase of a three-phase wire after being connected with one end of the attraction coil of the alternating-current contactor, and the other end of the second attraction and the other end of the attraction coil of the alternating-current contactor are respectively connected with the other two phases; an on button is connected between one end of the second attraction coil and the phase wire connected with the one end of the second attraction coil, and a self-locking contact is connected with the on button in parallel; and a switching contact and a main contact are connected between the other end of the attraction coil of the alternating-current contactor and the phase wire connected with the other end of the attraction coil of the alternating-current contactor.

Description

technical field [0001] The invention belongs to the technical field of safe operation of three-phase electricity, and in particular relates to an arbitrary phase loss protection device. Background technique [0002] At present, the AC contactors used generally only have a simple on-off function, but do not have a phase loss protection function. Once a phase loss occurs during operation, it is very easy to cause the consequence of burning the motor. The usual solution is to separately assemble a protective product in the control circuit for phase loss protection, which not only has the disadvantages of taking up a lot of space, inconvenient wiring, relatively large power consumption, and high cost, but also many Adopting the current type protection method has disadvantages such as multiple classifications of current specifications, poor stability and reliability, and poor circuit versatility of similar products. Contents of the invention [0003] In order to solve the prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/253
CPCH02H3/253
Inventor 李合峰李胜利李瑞峰谢亚辉崔莹科陈占强畅俊峰关海峰
Owner 国网河南孟津县供电公司
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