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
Publicity of Environmental Protection Acceptance for Completion of Kiln End Flue Gas Desulfurization Project of daye peak cement co., ltd. According to the requirements of the Interim Measures for Environmental Protection Acceptance for Completion of Construction Projects (No.4 [2017] of the State Environmental Regulations) issued by the Ministry of Environmental Protection, the environmental protection acceptance information of "Kiln End Flue Gas Desulfurization Project" of daye peak cement co., ltd. is now publicized. Basic Information of 1. Project Project Name: Kiln End Flue Gas Desulfurization Project Construction Unit: daye Jianfeng Cement Co., Ltd. Project Construction Location: Yongguang Village, Baoan Town, daye city, nature of the project in the existing plant area of daye Jianfeng Cement Co., Ltd.: The construction content of the technological transformation project is: This technological transformation project is mainly to build a wet desulfurization system for kiln end gas of the company's existing 4000t cement clinker production line, adopting limestone-gypsum wet flue gas desulfurization process. The project covers a total area of 500 m2, with a new construction area of about 450 m2. It mainly builds desulfurization complex building, flue gas system, SO2 absorption system, limestone powder conveying and limestone slurry preparation system, process water system, gypsum dehydration system and supporting pipelines. Power supply, water supply, compressed air and other public works rely on the existing plant. Total investment and environmental protection investment: the total investment of the project is 10.37 million yuan, all of which are environmental protection investment. The project was entrusted to Huangshi Yangtze River Environmental Engineering Design and Research Institute to carry out environmental impact assessment in September 2017. On November 16, 2017, Daye Municipal Environmental Protection Bureau issued a reply with YEHAN [2017] No. 354. Implementation of 2. environmental protection measures The scope of this acceptance is the flue gas desulfurization system and supporting facilities at the end of the kiln. (1) Exhaust gas pollution
2020
07-31
Spike New Drug Approved for Registration
On April 16, Jianfeng Pharmaceutical Company received the approval and issuance of Olopatadine Hydrochloride Eye Drops "Drug Registration Approval" (approval number: 2019S00296) approved by the State Drug Administration. Olopatadine hydrochloride eye drops is mainly used to treat the signs and symptoms of allergic conjunctivitis. It is a mast cell stabilizer and a relatively selective histamine H1-receptor antagonist. It can inhibit type I immediate allergic reactions in vivo and in vitro experiments. At present, the product has been included in the "National Basic Medical Insurance, Work Injury Insurance and Maternity Insurance Drug Catalog (2017 Edition)" and classified as Class B. According to the relevant data of IMS database, in 2018, the global sales of olopatadine hydrochloride eye drops were about 0.37 billion US dollars, and the sales in China were about 10.232 million US dollars. Spike Pharmaceuticals already has the corresponding production line, this time to obtain the registration approval, marking Spike Pharmaceuticals has the qualification to carry out the production and sales of olopatadine hydrochloride eye drops, will further enrich the product line of Spike Pharmaceuticals, help to enhance the competitiveness of the company's pharmaceutical business. (Xia Yingpin)
2020
07-31
Spike New Drug Approved for Registration
On April 16, Jianfeng Pharmaceutical Company received the approval and issuance of Olopatadine Hydrochloride Eye Drops "Drug Registration Approval" (approval number: 2019S00296) approved by the State Drug Administration. Olopatadine hydrochloride eye drops is mainly used to treat the signs and symptoms of allergic conjunctivitis. It is a mast cell stabilizer and a relatively selective histamine H1-receptor antagonist. It can inhibit type I immediate allergic reactions in vivo and in vitro experiments. At present, the product has been included in the "National Basic Medical Insurance, Work Injury Insurance and Maternity Insurance Drug Catalog (2017 Edition)" and classified as Class B. According to the relevant data of IMS database, in 2018, the global sales of olopatadine hydrochloride eye drops were about 0.37 billion US dollars, and the sales in China were about 10.232 million US dollars. Spike Pharmaceuticals already has the corresponding production line, this time to obtain the registration approval, marking Spike Pharmaceuticals has the qualification to carry out the production and sales of olopatadine hydrochloride eye drops, will further enrich the product line of Spike Pharmaceuticals, help to enhance the competitiveness of the company's pharmaceutical business. (Xia Yingpin)
2020
07-31
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