Function of Air Switch Interlock in Equipment Operation
Release time:
2020-12-01
air switch interlock in equipment operation
air switch is a very important component in low-voltage distribution network and electric drive system. It integrates control and various protection functions. In addition to completing contact and breaking circuits, it can also protect short circuits, severe overload and undervoltage of circuits or electrical equipment. At the same time, if we make a reasonable combination of interlocking, we can also protect the equipment and system from the lack of phase, misdivision and leakage of the air switch in operation. In
operation, the protection of the motor by the phase-missing interlock of the air switch
2017 , in view of the frequent burning of the motor due to the phase-missing in the packaging lane of daye peak cement company, we decided to carry out the air switch interlock after comprehensive analysis, use three 220V intermediate relays to split the three phases at the outlet end of the air switch, and then connect the three opening points in series with each other and then in series to the control loop, the loading lane after interlocking has not burned the motor due to lack of phase so far. Protection of Equipment and System by Misdividing Interlock of Air Switch during
Operation
In 2018 , the air switch of the main motor transformer of Daye Peak Kiln was broken due to the burning of the cooling fan, resulting in excessive temperature rise of the transformer. After analyzing the reasons, we installed a 220V intermediate relay at the outlet end of the air switch of the control power supply, and then tripped the transformer to interlock and connect it to the relay closing point. After interlocking, the transformer is protected in all directions. On October 28, 2020, the limestone yard stacker due to the hydraulic station air switch misdivision caused the pile back pressure dead, to find out the reason after we use the intermediate relay for combination interlocking, and then the hydraulic station comprehensive fault interlocking and connected to the relay closing point, interlocking after the stacking system for a good protection.
During operation, the leakage and interlocking of the air switch protects the equipment
2017 . Because the auxiliary transmission of the finished 3# cake hoist is of double drive structure, there is a drawer cabinet empty during power transmission, resulting in stand-alone operation. After finding out the reason, we interlocked the air switches of the two drawer cabinets with each other and connected them in series to the control circuit, so that the equipment cannot be turned on no matter which air switch is not closed, and no matter which air switch trips and the other trips at the same time. So far, the interlocking has effectively protected the equipment.
It can be seen from the above that the reasonable combination of air switch interlocking is used flexibly in the low-voltage distribution network and electric drive system to protect the equipment well, which fully reflects the importance of air switch interlocking in the operation of the equipment. (Shi Zhangliang)
More information
Zhang Yiwen, deputy director of the provincial science and technology department, visited the peak
News from our newspaper On July 17, Zhang Yiwen, deputy director of the Zhejiang Provincial Department of Science and Technology, and his entourage visited Jianfeng Group and had a discussion with leaders of group companies such as Jiang Xiaomeng and Yu Jianhong. Jiang Xiaomeng, chairman of the group company, introduced to Deputy Director Zhang Yiwen the development, business status, industrial structure adjustment, product innovation and research and development of Jianfeng Group in recent years from the cement, medicine and health sectors. Huang Jinlong, deputy general manager of the group company and general manager of the pharmaceutical company, emphatically introduced the industrial layout, scientific research level, innovative development direction, achievements, and research projects of the pharmaceutical company. The two sides also exchanged views on information docking, innovation project support, industrialization projects and other related issues. Deputy Director Zhang Yiwen fully affirmed Jianfeng's work in recent years. He said that since Jianfeng's old cement industry has moved to other provinces in recent years, he has paid less attention to it. He did not expect to do so well now. What is particularly gratifying is that Jianfeng pays attention to the investment in technological innovation while developing, and clarifies the development direction of "making the enterprise bigger and stronger". It is a listed company that allows shareholders to rest assured. (Reporter Ni Yingzhen)
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Zhang Yiwen, deputy director of the provincial science and technology department, visited the peak
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Teachers and Students of Zhejiang Gongshang University Visit Peak Health
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