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
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The high temperature season is approaching, and the group company issued a notice a few days ago to make arrangements for safe production in summer. The notice requires all subordinate units of the company to attach great importance to the work of production safety in summer, and all production and business units should hold a special meeting on production safety in summer. According to the characteristics of production in summer, they should focus on safety risk analysis for mines, outdoor operations and high-temperature posts, and implement control measures to avoid the occurrence of safety accidents such as scalding, heatstroke and electric shock. In order to further strengthen the safety production management in the high temperature season, the notice requires the main person in charge of each production and business unit to lead a team to conduct a comprehensive inspection of the production and business premises according to the characteristics of summer production; strengthen the daily safety production inspection of key posts and special posts; timely rectify the found unsafe behaviors and hidden dangers; Strengthen the management of the storage and use of flammable, explosive, dangerous chemicals and drugs; cooling measures shall be taken for the space exceeding the storage temperature limit of articles. If it is found that the electrical equipment circuit and exhaust fan circuit are aged and damaged, replace them in time and keep the grounding wire in good condition. Do a good job in checking the fire pool, pipeline water pressure and fire extinguishing equipment to ensure that the fire fighting facilities are sensitive, intact and reliable. The high temperature in summer is also a period of frequent occurrence of heatstroke and other diseases. The notice requires all units to do a good job in heatstroke prevention and cooling, implement various relevant measures, and equip necessary cooling facilities or materials such as fans, air conditioners, ice cubes and other cooling facilities or materials according to the conditions of the production site; do a good job in the distribution of heatstroke prevention drugs, supplies and cool drinks in workshops, warehouses, construction sites and other production lines; strengthen canteen management to prevent food poisoning. (this newspaper reporter)
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2020
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In order to celebrate the 99th anniversary of the founding of the Communist Party of China, on the afternoon of June 28, the Party committee of Jianfeng pharmaceutical company held a special commemorative activity. More than 100 Party members reviewed the oath of joining the party and listened to the special party class of "why can the Communist Party of China" delivered by Professor Zhang Wecai of the Party School of Jinhua municipal Party committee. At the beginning of the activity, Jin Huazhong, secretary of the Party Committee of Jianfeng Pharmaceutical, led all the participating party members to review the oath of joining the Party. He emphasized that the oath of joining the party is a solemn promise of every party member. As a party member, you must not forget your original intention, and compare the content of the oath in your work and life, constantly review, constantly reflect, strengthen self-examination, and use practical actions to fulfill your commitment to the party. Promise. On April 17, 2019, General Secretary Xi Jinping pointed out during an inspection in Chongqing: "We must focus on major issues such as why the Communist Party of China can, why Marxism can, and why socialism with Chinese characteristics is'good. 'Ideological and public opinion guidance." In order to enable party members to have a deeper understanding and understanding of this, the party committee of Jianfeng Pharmaceutical invited Professor Zhang Wancai, member of the School Affairs Committee and dean of the Jinhua Municipal Party School, to give a special lecture entitled "Why the Communist Party of China can. Professor Zhang reviewed the glorious history and great achievements of the Communist Party of China, combining theory with examples and current affairs, and expounded from the aspects of the Communist Party of China taking the people as the center, keeping in mind the mission of seeking happiness for the people, having the courage to self revolution and having historical responsibility. The content of his lectures was profound and simple, the classroom atmosphere was serious and earnest, and Party members were deeply enlightened. After the lecture, Jin Huazhong said in his concluding speech that the purpose of holding this commemorative event is to make all party members keep their vows in mind, strengthen theoretical guidance, strengthen ideals and beliefs, consciously practice the theme education of "not forgetting the original intention and keeping in mind the mission", and enhance all party members. Self-confidence in the road, theory, system, and culture. He stressed that the successful experience of the Communist Party of China, as a great organization, is of great practical significance to the reform and development of enterprises. Party organizations at all levels of Jianfeng Pharmaceutical should further strengthen the building of party branches and party members, further give full play to the political core role of party organizations and the vanguard and exemplary role of party members, promote the production and operation of enterprises with party building, and unite the broad masses of party members, cadres and all staff. devote themselves to all kinds of work with more enthusiasm, higher morale and more pragmatic style, and strive to achieve the annual work goals of the pharmaceutical company, together to build a better peak pharmaceutical industry. (Reporter Chen Shengmu)
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