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
Editor's note: During the National Day, the "Jinhua New Observation" column of Jinhua TV Station launched a series of reports on "National Day New Observation: New Development of Old Enterprises" to understand the new developments of those old enterprises that have grown up with New China in the new era. October 3 broadcast of the "peak of the 'centennial 'ideal", about the development of the peak group and the future direction of development. The "century" ideal of the peak Jinhua TV reporter Wang Dujuan Jiang Qian host: speaking of Zhejiang Jianfeng Group Co., Ltd., Jinhua people are no stranger. The older generation of Jinhua people are more familiar with, may be the predecessor of Jianfeng Group-Jinhua Cement Factory. Open the first old photo 58 years ago, surrounded by mountains and a rice field in the middle. Old Jinhua can see at a glance that this is the Wise Temple, 8 kilometers north of Jinhua City and east of the former Zhuangtou of Luodian Town. In August 1958, the first group of pioneers came here and built Jinhua's first cement factory on a desolate hillside of 16.94 mu with a pair of hands and warm blood. From the earliest cattle-drawn ball forming machine to the electric ball forming machine, from pure manual labor to machine substitution, it took 26 years of hard work. By 1983, the annual output of peak cement reached 120000 tons, the output value was 6.75 million yuan, and the profit was 2.4 million yuan. In these 26 years, the cement plant has experienced a difficult period of the country, and the ten-year catastrophe of the "Cultural Revolution" has finally ushered in a good time of reform and opening up with tenacious vitality, laying the foundation for steady development in the future. Looking at these old pictures,
2020
07-31
Peak Cement Successfully Enters Lancang Airport Project
News from our newspaper On September 26, the first batch of airport runway cement produced by Yunnan Jianfeng Cement Company was successfully delivered to the Lancang Airport site, which marked another important step in the expansion of Jianfeng Cement in the southwest Yunnan market. Lancang Airport is located in Donghi Town, Lancang Lahu Autonomous County, Pu'er City. It is the center of the "three counties" and "Pu'er Green Triangle" tourist areas of Lancang, Menglian and Ximeng, with a wide range of radiation and obvious location advantages. The project is a national "Twelfth Five-Year Plan" construction project and a key construction project in Yunnan Province. It was approved by the State Council and the Central Military Commission in January 2013. It started construction at the end of November 2014 and is expected to be completed in April 2017. The current project of Lancang Airport is designed to meet the target of 250000 passenger throughput and 750 tons of cargo throughput by 2020, including the construction of a 2600-meter-long and 45-meter-wide runway, the construction of a new 3000-square-meter terminal building and 4 apron parking spaces, including communication, navigation, lighting, meteorology and other supporting projects. The total investment of the project is 1.533 billion yuan. Upon completion, it can be used for Boeing 737 series, Airbus A319 and A320 series, MA-60 and other passenger aircraft take off and land. Since the start of the Lancang Airport project, Yunnan Peak has listed it as an important goal to strive. Compared with ordinary cement, special cement for airport runways has the characteristics of small shrinkage, strong wear resistance, good frost resistance and low alkali content in addition to the requirements of ordinary 42.5 Portland cement. To this end, Yunnan peak in the project to strive for at the same time, the collection of technical forces to tackle the problem, in the clinker composition to determine, cooked.
2020
07-31
Jianfeng won the Zhejiang Industrial Award
A few days ago, we learned from the relevant departments of Zhejiang Province that the company won the 2016 "Zhejiang Industrial Award Silver Award". Zhejiang Industrial Award was established in 2014 and is selected every two years. The purpose of carrying out the selection and commendation of the Zhejiang Industrial Awards is to thoroughly implement the "August 8 Strategy", comprehensively implement the innovation-driven development strategy, speed up the industrial transformation and upgrading with the "four for three" as the starting point, and commend the adherence to the scientific concept of development. adhere to industry, conscientiously fulfill social responsibilities, establish a modern enterprise system, and take a new road of industrialization with characteristics. The evaluation work is jointly organized and implemented by Zhejiang Industrial Economic Federation, Enterprise Federation, Entrepreneur Association, relevant provincial industry associations, municipal industrial economic federations, enterprise federations, entrepreneur associations, and relevant units. The award review committee is composed of relevant government departments, provincial "three committees", relevant provincial industry associations, and experts in industrial economy, management, finance, taxation, quality, environmental protection, safety, technology, and law, the participating enterprises are comprehensively evaluated from the aspects of industry demonstration role, scientific and technological innovation, economic benefits, resource utilization, environmental protection, brand strategy, product quality, production safety, social responsibility, enterprise management, human resources and so on. "The enterprises that have won the Zhejiang Industrial Award this time are all outstanding enterprises that have made significant contributions to the promotion of Zhejiang's economic development; they are all leading enterprises, backbone enterprises, and high-growth enterprises from different industries, representing the scale of Zhejiang's industrial development. The direction and leading spirit represent the highest level of Zhejiang's industrial development." According to the organizers related negative
2020
07-31
Peak Cement Successfully Enters Lancang Airport Project
News from our newspaper On September 26, the first batch of airport runway cement produced by Yunnan Jianfeng Cement Company was successfully delivered to the Lancang Airport site, which marked another important step in the expansion of Jianfeng Cement in the southwest Yunnan market. Lancang Airport is located in Donghi Town, Lancang Lahu Autonomous County, Pu'er City. It is the center of the "three counties" and "Pu'er Green Triangle" tourist areas of Lancang, Menglian and Ximeng, with a wide range of radiation and obvious location advantages. The project is a national "Twelfth Five-Year Plan" construction project and a key construction project in Yunnan Province. It was approved by the State Council and the Central Military Commission in January 2013. It started construction at the end of November 2014 and is expected to be completed in April 2017. The current project of Lancang Airport is designed to meet the target of 250000 passenger throughput and 750 tons of cargo throughput by 2020, including the construction of a 2600-meter-long and 45-meter-wide runway, the construction of a new 3000-square-meter terminal building and 4 apron parking spaces, including communication, navigation, lighting, meteorology and other supporting projects. The total investment of the project is 1.533 billion yuan. Upon completion, it can be used for Boeing 737 series, Airbus A319 and A320 series, MA-60 and other passenger aircraft take off and land. Since the start of the Lancang Airport project, Yunnan Peak has listed it as an important goal to strive. Compared with ordinary cement, special cement for airport runways has the characteristics of small shrinkage, strong wear resistance, good frost resistance and low alkali content in addition to the requirements of ordinary 42.5 Portland cement. To this end, Yunnan peak in the project to strive for at the same time, the collection of technical forces to tackle the problem, in the clinker composition to determine, cooked.
2020
07-31
Peak Cement Successfully Enters Lancang Airport Project
News from our newspaper On September 26, the first batch of airport runway cement produced by Yunnan Jianfeng Cement Company was successfully delivered to the Lancang Airport site, which marked another important step in the expansion of Jianfeng Cement in the southwest Yunnan market. Lancang Airport is located in Donghi Town, Lancang Lahu Autonomous County, Pu'er City. It is the center of the "three counties" and "Pu'er Green Triangle" tourist areas of Lancang, Menglian and Ximeng, with a wide range of radiation and obvious location advantages. The project is a national "Twelfth Five-Year Plan" construction project and a key construction project in Yunnan Province. It was approved by the State Council and the Central Military Commission in January 2013. It started construction at the end of November 2014 and is expected to be completed in April 2017. The current project of Lancang Airport is designed to meet the target of 250000 passenger throughput and 750 tons of cargo throughput by 2020, including the construction of a 2600-meter-long and 45-meter-wide runway, the construction of a new 3000-square-meter terminal building and 4 apron parking spaces, including communication, navigation, lighting, meteorology and other supporting projects. The total investment of the project is 1.533 billion yuan. Upon completion, it can be used for Boeing 737 series, Airbus A319 and A320 series, MA-60 and other passenger aircraft take off and land. Since the start of the Lancang Airport project, Yunnan Peak has listed it as an important goal to strive. Compared with ordinary cement, special cement for airport runways has the characteristics of small shrinkage, strong wear resistance, good frost resistance and low alkali content in addition to the requirements of ordinary 42.5 Portland cement. To this end, Yunnan peak in the project to strive for at the same time, the collection of technical forces to tackle the problem, in the clinker composition to determine, cooked.
2020
07-30
Peak two enterprises were commended
On September 23, the launching ceremony of the 2016 Jinhua Zhejiang Shopping Festival and the 2015 Jinhua Honest Enterprise Commendation Conference were held in the urban people's square. Jianfeng Group's Jinhua Jianfeng Pharmacy Chain Co., Ltd. and Zhejiang Jianfeng International Trade Co., Ltd. were commended.
2020
07-31
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