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)
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2020
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Peak natural products among the top 20 scientific and technological innovation in TEDA
A few days ago, Tianjin Jianfeng Natural products Research and Development Co., Ltd. stood out among nearly 35000 enterprises in Tianjin Development Zone and won the honor of "Top 20 Scientific and technological Innovation Enterprises of 2015. The selection criteria for the top 20 scientific and technological innovation enterprises in Tianjin Economic and Technological Development Zone mainly include: they have won science and technology awards or patent awards in 2015, as well as other awards above the provincial level; they have obtained the qualification certification or approval of research and development institutions above the provincial level; in 2015, the number of invention and utility model patent applications and authorizations was large, totaling more than 15; in 2015, they were supported by national or Tianjin key science and technology plans; scientific research achievements have made significant progress and technology. According to the above standards, Jianfeng Natural Products Company has not only won the second prize of Tianjin Science and Technology Innovation Project Award for the achievements of "Tianjin Plant Waste Reutilization Technology Engineering Center Construction", but also completed the process research of grape seed extract and ginsenoside to pesticide residues, and formulated the international business standard of grape seed extract (grape seed oligomeric proanthocyanidins). In order to better carry out the pilot experiment, large-scale technical transformation was carried out on the second workshop, and the process optimization of extracting anthocyanins from blueberries has been carried out. At the same time, the main business income, operating profit, tax revenue and other economic indicators of peak natural products company in 2015 have increased significantly year-on-year. Relying on the advantages of excellent quality, good efficiency, great contribution, safety and environmental protection, and good social responsibility, Jianfeng Natural Products Company successfully passed the review and became one of the "Top 20 Scientific and Technological Innovation Enterprises in 2015" in Tianjin Development Zone. (
2020
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Peak pharmaceutical "enterprise information construction project" through the acceptance
The "Enterprise Informatization Construction Project" of Jianfeng Pharmaceutical Company was included in the list of key projects of "Integration of Industrialization and Industrialization" (high-level and in-depth combination of informatization and industrialization) in Jinhua City in 2015, and successfully passed the on-site acceptance of the expert group on the morning of May 18. The main contents of the "enterprise information construction project" of the pharmaceutical company include: the tank farm control system, which solves the problem of closed metering and transportation of organic solvents between the tank farm and the production area, can automatically realize the terminal metering setting, and effectively ensure the safety and environmental protection requirements of the tank farm operation; The air conditioning automatic control system realizes the control of the temperature, humidity and room pressure difference in the air conditioning area through the PLC digital-to-analog conversion of the upper computer and lower computer and the terminal actuator regulator, ensure the cleanliness requirements of the production area environment; The online particle monitoring software system automatically adjusts to the standard flow through the upper computer, vacuum system, laser sensor and isodynamic sampling probe, etc. through the flow detector device and key orifice plate inside each sensor, monitors the temperature, humidity, particles, planktonian bacteria, room pressure difference, etc., implements dynamic management, and realizes visual monitoring of the production process environment. MRP production management system, it makes it easier for the warehouse, workshop, and management personnel to obtain information about the flow of materials in the production process, the implementation of production plans, and product inventory. During the on-site acceptance on the 18th, the acceptance team composed of the Information Department of the Municipal Economic and Information Commission, the Economic and Development Bureau of the Development Zone, the Municipal Information Promotion Association and professors of Zhejiang Normal University checked the contracts of each system software, purchase and transfer records, training records, and problem records in project implementation,
2020
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Peak natural products among the top 20 scientific and technological innovation in TEDA
A few days ago, Tianjin Jianfeng Natural products Research and Development Co., Ltd. stood out among nearly 35000 enterprises in Tianjin Development Zone and won the honor of "Top 20 Scientific and technological Innovation Enterprises of 2015. The selection criteria for the top 20 scientific and technological innovation enterprises in Tianjin Economic and Technological Development Zone mainly include: they have won science and technology awards or patent awards in 2015, as well as other awards above the provincial level; they have obtained the qualification certification or approval of research and development institutions above the provincial level; in 2015, the number of invention and utility model patent applications and authorizations was large, totaling more than 15; in 2015, they were supported by national or Tianjin key science and technology plans; scientific research achievements have made significant progress and technology. According to the above standards, Jianfeng Natural Products Company has not only won the second prize of Tianjin Science and Technology Innovation Project Award for the achievements of "Tianjin Plant Waste Reutilization Technology Engineering Center Construction", but also completed the process research of grape seed extract and ginsenoside to pesticide residues, and formulated the international business standard of grape seed extract (grape seed oligomeric proanthocyanidins). In order to better carry out the pilot experiment, large-scale technical transformation was carried out on the second workshop, and the process optimization of extracting anthocyanins from blueberries has been carried out. At the same time, the main business income, operating profit, tax revenue and other economic indicators of peak natural products company in 2015 have increased significantly year-on-year. Relying on the advantages of excellent quality, good efficiency, great contribution, safety and environmental protection, and good social responsibility, Jianfeng Natural Products Company successfully passed the review and became one of the "Top 20 Scientific and Technological Innovation Enterprises in 2015" in Tianjin Development Zone. (
2020
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