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
Peak re-listed China's top 100 cement production capacity Daye peak won the "smart factory leader"
On July 11-12, the 2022 China Cement Industry Summit and TOP100 Award Ceremony organized by China Cement Network, an authoritative media of China's cement industry, was held in Hangzhou. Jianfeng Group once again ranked among the top 100 cement clinker production capacity in China.
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On the afternoon of July 12, the party Committee of the group company held a special meeting attended by party Committee members, senior and middle-level management backbones, heads of grass-roots party organizations and all party members of the group headquarters to learn and convey the spirit of the 15th party congress of the communist party of China in Zhejiang province.
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On the morning of July 1, more than 40 members of the group's party committee, party members of various branches of the group headquarters, and party members of subordinate enterprise branches went to the Shuanglong Hydropower Station, the Red Education Base of Jinhua City, to receive party spirit and revolutionary tradition education.
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Vocational skill level identification examination!
On June 16 and 18, the theoretical and practical examinations for the determination of professional skill level in the peak pharmaceutical sector were held successively in Jinxi pharmaceutical factory. The independent identification of vocational skill level includes three occupations (types of work): pharmaceutical preparation worker, chemical inspector and organic synthesis worker, basically covering the main posts in the pharmaceutical sector, with a total of 125 employees signing up for the identification.
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On June 16, the Jianfeng Pharmaceutical Quality Research and Development Party Branch and the Jinhua Vocational Skills Management Service Center Party Branch held a signing ceremony in Jinxi Factory to establish a party building alliance.
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Jinhua Mayor Xing Zhihong to Peak Research
On the afternoon of June 1, Jinhua Mayor Xing Zhihong, Wucheng District Party Committee Secretary Gao Feng, District Mayor Hu Yuxian, and heads of the Municipal Economic and Information Bureau, Development and Reform Bureau and other departments went to the group headquarters to discuss and exchange with the leaders of the group company to understand the development of the enterprise. Solicit opinions and suggestions from enterprises on government work. After understanding the current business situation of the peak, Xing Zhihong pointed out that focus, follow the right path, frontier, steady, is the peak to long-term prosperity of the magic weapon, must continue to adhere.
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