Aging method of low-voltage electrical appliances with double gold structure

A technology of low-voltage electrical appliances and complete machines, which is applied in the field of long-time protection electrical appliances to shorten the adjustment time, improve reliability, and avoid zero-point drift problems

Active Publication Date: 2017-03-15
ZHEJIANG CHINT ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for the aging of low-voltage electrical appliances with a double-gold structure. By adopting the aging process of the whole machine, the above-mentioned two problems existing in the existing double-gold thermal relay can be solved at the same time. In the process, the stability of the double sequins can be effectively improved and maintained, and the zero point drift of the double sequins can be avoided, and the manufacturing, assembly and inspection of electrical appliances can be conveniently realized

Method used

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  • Aging method of low-voltage electrical appliances with double gold structure
  • Aging method of low-voltage electrical appliances with double gold structure

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no. 2 example

[0031] The second embodiment of the inventive method comprises the following steps:

[0032] 1. Before the calibration of low-voltage electrical products is completed after assembly, the complete machine of low-voltage electrical products is connected to 6 times the rated current of the three-phase main circuit on the automatic tooling line, and the current is gradually reduced to 1.2 times. Aged for 8 minutes.

[0033] 2. After the aging of the whole machine is completed, the whole machine is cooled for 7 minutes until the product is reset.

[0034] 3. Connect the three-phase 1.05 times the rated current on the long-delay calibration platform, and stabilize it for 25 minutes to adjust the early trip product. Because the product has undergone high-current aging in the first step, the product has obtained enough heat, which will greatly shorten the thermal equilibrium time of long-delay calibration by 1.05 times.

[0035] 4. Turn on 1.2 times the rated current for 50 minutes ...

no. 3 example

[0036] The third embodiment of the inventive method comprises the following steps:

[0037] 1. Before the calibration of low-voltage electrical products is completed after assembly, the complete machine of low-voltage electrical products is connected to 6 times the rated current of the three-phase main circuit on the automatic tooling line, and the current is gradually reduced to 1.3 times. Aged for 5 minutes.

[0038] 2. After the aging of the whole machine is completed, the whole machine is cooled for 8 minutes until the product is reset.

[0039] 3. Connect the three-phase 1.05 times the rated current on the long-delay calibration platform, and stabilize for 20 minutes to adjust the early tripping product. During this process, the early tripping of the product can be adjusted for the product.

[0040] 4. Turn on 1.2 times the rated current for 2 hours on the long-time delay calibration platform, and the product that does not trip during this process can be calibrated.

no. 4 example

[0041] The fourth embodiment of the inventive method comprises the following steps:

[0042] 1. Before the calibration of low-voltage electrical products is completed after assembly, the whole low-voltage electrical product is connected to the three-phase main circuit with 1.5 times the rated current to age the whole machine for 20 minutes.

[0043] 2. After the aging of the whole machine is completed, the whole machine is cooled for 10 minutes until the product is reset.

[0044]3. Connect the three-phase 1.05 times rated current on the long-delay calibration platform, stabilize for 30 minutes to adjust the early tripping product, during this process, the early tripping of the product can be adjusted for the product.

[0045] 4. Turn on 1.2 times the rated current for 30 minutes on the long-time delay calibration platform, and the product that does not trip during this process can be adjusted.

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Abstract

Provided is a complete machine ageing method for a low-voltage electric appliance with a dual-metal structure. The method comprises the following steps that firstly, before an assembled low-voltage electric appliance product is verified, the complete machine product of the low-voltage electric appliance is connected with 1.2-6-time rated currents of a three-phase main circuit, and complete machine ageing is performed for five to twenty minutes; secondly, after complete machine ageing is completed, the whole machine is cooled until the product restores; thirdly, the complete machine is connected with 1.05-time rated currents and stabilized for twenty to forty minutes, and regulation is performed on the early released product; the complete machine is connected with 1.2-time rated currents and acts for ten minutes to two hours, and regulation is performed on the non-released product in the process. According to the complete machine ageing method, complete ageing technology is used for solving the multiple problems of an existing dual-metal type thermal relay; in the whole automatic production process, the stability of a dual-metal piece can be effectively improved and maintained, zero wander of the dual-metal piece can be avoided, and manufacturing, assembling and inspection of the electric appliance can be achieved conveniently.

Description

technical field [0001] The present invention relates to a long-time protection electrical appliance with a double-gold structure, in particular to a method for aging the whole machine of a double-gold thermal overload relay, and is also applicable to a plastic case circuit breaker with a double-gold structure, a small Electrical appliances such as circuit breakers. Background technique [0002] Long-time protection appliances with a double-gold structure have been widely used in industry and civilian use. Take thermal overload relays (hereinafter referred to as "thermal relays") as an example. Thermal relays use the thermal effect of current to cut off circuits. The protection device, often used in conjunction with the contactor, is used for the protection of overload, phase failure and current unbalanced operation. The main protection object is the control of the heating state of the motor and other electrical equipment on the line. The double-gold thermal relay has been w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H69/01
CPCH01H69/01
Inventor 岳喜雷胡建国
Owner ZHEJIANG CHINT ELECTRIC CO LTD
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