Circuit for contactor type double-power-supply changeover switching appliance

A technology of dual power conversion and switching electrical appliances, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problems of unsatisfactory mechanical interlock reliability, unsatisfactory use requirements, slow conversion speed, etc., and achieve power saving effect. Obvious, great promotion value, close power factor effect

Inactive Publication Date: 2015-06-17
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second stage is the circuit breaker type, which belongs to the CB class. It is composed of two circuit breakers, an electric mechanism and a mechanical interlock mechanism. It has the function of short circuit or overcurrent protection. Comply with the use requirements of fire-fighting loads and other places, and its application field has certain limitations
At present, the problem of low interlock reliability has been overcome. If the weakness of high power consumption can be improved by technical means, the purpose of energy saving and environmental protection can be achieved, and the temperature rise can be reduced to improve its reliability, which can greatly improve its cost performance. Bringing the replaced CC-Class ATSE back to life

Method used

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  • Circuit for contactor type double-power-supply changeover switching appliance
  • Circuit for contactor type double-power-supply changeover switching appliance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: see figure 1 ~ figure 2 , the circuit used for the contactor-type dual power supply switching electrical appliances includes two AC contactors as the normal power switch and the backup power switch, and a control circuit for controlling the operation of the two AC contactors; The contactor is defined as a common contactor KM2, and the AC contactor installed at the switch end of the standby power supply is defined as a standby contactor KM1; the control circuit includes a working power supply module for supplying power to the system circuit, which is used as a control unit module for central data processing. The power supply voltage signal detection module, human-computer interaction module, and contactor working state detection module connected to the input end of the control unit module, and the working state display module, output alarm signal module, and control subsequent energy-saving circuit module respectively connected to the output end of the co...

Embodiment 2

[0048] Example 2: see figure 2 , this embodiment is basically the same as Embodiment 1, the difference lies in the capacity of the main switch contact: Specifically, for the ATSE whose main switch contact is 16A~25A, the CJT1 series AC contact with a rated current of 9A~12A can be selected If the working voltage is 220V: the non-polar capacitor C1 can choose a CBB capacitor with a withstand voltage of 400V and a capacity of 0.47uF; or a safety capacitor with a withstand voltage of 240V and a capacity of 0.47uF to match it The discharge resistor R1 is 750kΩ. If the working voltage is 380V: the non-polar capacitor C1 can be a CBB capacitor with a withstand voltage of 630V and a capacity of 0.22uF; or a safety capacitor with a withstand voltage of 400V and a capacity of 0.22uF, matching the discharge resistor R1 is 500kΩ.

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Abstract

The invention discloses a circuit for a contactor type double-power-supply changeover switching appliance. The circuit is characterized in that a key energy-saving circuit module is provided with a capacitive step-down circuit and an input selection switch. The capacitive step-down circuit is provided with a starting relay which serves as a short-circuiting switch and is used when contactors are subjected to full-voltage start-up, and an attracting hold mode of a contactor with relatively low power is powered by the capacitive step-down circuit, so that a high-voltage startup and low-voltage hold energy-saving mode is realized. The circuit has the following main advantages that energy-saving circuit module connection and the input selection switch are used in a matched manner, so that two alternating current contactors can jointly use one energy-saving circuit module, one energy-saving circuit module is saved, the structure of the circuit is simplified, and the reliability of the circuit is improved; the cost power factor is decreased by about 1, and the power consumption is low, the economical efficiency is high, the cost performance is high, no specific alternating current contactor noise exists during operation, the manufacturing is easy, the maintenance is convenient, the maintenance cost is low, and the circuit is energy-saving and environment-friendly. The circuit can be used in a manner of replacing PC level ATSE (Automatic Transfer Switching Equipment), thereby having relatively great popularization value.

Description

technical field [0001] The invention relates to a low-voltage electrical appliance, in particular to a dual-power conversion switching appliance with an AC contactor as the main switch. Background technique [0002] In some important occasions of low-voltage power distribution, in order to reduce economic losses caused by power outages, two power sources are used for power supply: common use, backup or mutual backup. Power the diesel generator. When one power supply fails to supply power normally due to a fault during the power supply process, the device whose load can be switched to another power supply is called a dual power supply switching device, or TSE for short, and the device whose load is automatically switched to another power supply is called an automatic power supply. Transfer switch electrical appliances, referred to as ATSE. [0003] At present, ATSE is generally composed of two parts: the automatic transfer switch body and the control circuit, and is mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
CPCY02B70/30Y04S20/20
Inventor 张焕明
Owner FOSHAN UNIVERSITY
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