The document discusses design considerations for equipment used to apply solvent-based coatings compared to water-based coatings. Special design is needed for solvent-based coatings to address flammability issues from explosive vapors, protect operator health from solvent exposure, and prevent excess VOC emissions. Electrical components and wiring in hazardous areas where vapors are present must be explosion-proof. Ventilated enclosures around coating stations can effectively capture vapors and protect operators while working.
The document provides an overview of arc flash hazards, including causes of electric arcs such as dust, corrosion, condensation, accidental contact, dropping tools, and failure of insulating materials. It describes the intense heat, pressure waves, and temperatures over 35,000 degrees Fahrenheit produced by electric arcs. Recent standards like NFPA 70E and IEEE 1584 provide guidelines for determining flash protection boundaries, hazard categories, and selecting personal protective equipment to mitigate arc flash exposure. The document is a practical guide for implementing an arc flash safety program in compliance with relevant codes and standards.
This document provides an overview of fuse characteristics, terms, considerations, and selection factors. It defines key fuse-related terms like current rating, breaking capacity, dimensions, and construction. It also covers selection factors like ambient temperature, pulses, and standards. The purpose is to help readers understand fuses and properly select the right fuse for their application. Selection involves considering characteristics like operating current, temperature, pulses and standards to avoid issues like nuisance opening.
Lightning it,s Nature Call ,Many Disaster Seen due to Wrong Selection , Design ,Engineering ,Installation and Periodical Maintenance.
Lightning Kills&Damage our Valuable Assets IEC62305 Claim Conventional for lightning Protection involve many Components Cost is very High,Design and Installation after Maintenance also critical.
Because of Electrical Product Manufacturer worldwide Support Funding IEC Group some of company who manufacturer Conventional Lightning Products funding just to see no other lighting protection Technologies enter&approved by these Committee No Fair Business Practice.
ESE Lightning Protection Always Claim Offering Product Tested by LAB to their customer Easy way to design ,Installation&Total Cost is economical,Maintenance very easy.
Many countries adopted in their Standard.
Manufacturer who is supporting products with LAB Certificate should only entertain many companies in India Supply submitting Forged Certificate .
Indian Government Agencies Releasing Tender for ESE Lighting Solar PV Project , Power Substation Transmission and Distribution , Railway &Metro Rail Projects,
NBC2016 BIS who is influence with IEC not included and cheated Indian Government&Partial approach because of Low Knowledge about Lightning Design&Selection of Products.
Contact us
This document discusses electrical discharge machining (EDM). It summarizes key parameters and concepts in EDM processes. The parameters that influence EDM include supply voltage, breakdown voltage, charging resistance, capacitance, gap setting, electrode material, electrode movement, electrode wear, dielectric fluid, flushing method, process parameters like current and pulse duration, types of EDM like wire EDM, factors that influence material removal rate and surface integrity like surface roughness, recast layer and heat affected zone. The document also discusses characteristics of EDM processes.
Water-based coatings are increasingly replacing solvent-based coatings due to legislation aimed at reducing VOC emissions from solvents. Water-based coatings contain 98% less VOCs and no hazardous isocyanates. They are safer for the environment and employees' health. While water-based coatings traditionally take longer to dry, microwave drying technology can reduce drying time to less than 15 minutes, matching solvent-based coating drying times in an environmentally friendly way. Switching to water-based coatings helps organizations comply with increasing environmental regulations in a cost-effective manner.
This document discusses coating and laminating processes for paper and films. It describes several methods including extrusion coating, thermal laminating, wet bond laminating, dry bonding, solventless laminating, and extrusion laminating. Extrusion coating is commonly used to apply polyethylene to paperboard with benefits over wax coating like greater strength and moisture resistance. Laminating combines webs using thermal or chemical bonding with adhesives. Thermal laminating uses heat to bond adhesives while wet bond laminating relies on water or solvent. Dry bonding and solventless laminating avoid volatile organic compounds. The document also discusses factors in dry surface treatment coating like particle size and heat treatment to achieve an adequate coating layer.
Toxicity of dyestuffs and textile dyes
Textile dyes comprise over 8,000 compounds used in textiles like cotton. Reactive dyes used for cellulose fibers have been found to cause adverse health effects in textile workers and environmental toxicity. Some dyes like azo dyes contain compounds that are carcinogenic and cause allergic reactions, respiratory diseases, and immunoglobulin level changes in exposed workers. Dyes can also contain heavy metals and other toxic chemicals that are absorbed through the skin and cause symptoms like rashes, headaches, and organ damage. Intestinal bacteria can break down azo dyes in particular and produce carcinogenic metabolites, demonstrating the toxicity risks of dye degradation products to
The document provides an overview of arc flash hazards, including causes of electric arcs such as dust, corrosion, condensation, accidental contact, dropping tools, and failure of insulating materials. It describes the intense heat, pressure waves, and temperatures over 35,000 degrees Fahrenheit produced by electric arcs. Recent standards like NFPA 70E and IEEE 1584 provide guidelines for determining flash protection boundaries, hazard categories, and selecting personal protective equipment to mitigate arc flash exposure. The document is a practical guide for implementing an arc flash safety program in compliance with relevant codes and standards.
This document provides an overview of fuse characteristics, terms, considerations, and selection factors. It defines key fuse-related terms like current rating, breaking capacity, dimensions, and construction. It also covers selection factors like ambient temperature, pulses, and standards. The purpose is to help readers understand fuses and properly select the right fuse for their application. Selection involves considering characteristics like operating current, temperature, pulses and standards to avoid issues like nuisance opening.
Lightning it,s Nature Call ,Many Disaster Seen due to Wrong Selection , Design ,Engineering ,Installation and Periodical Maintenance.
Lightning Kills&Damage our Valuable Assets IEC62305 Claim Conventional for lightning Protection involve many Components Cost is very High,Design and Installation after Maintenance also critical.
Because of Electrical Product Manufacturer worldwide Support Funding IEC Group some of company who manufacturer Conventional Lightning Products funding just to see no other lighting protection Technologies enter&approved by these Committee No Fair Business Practice.
ESE Lightning Protection Always Claim Offering Product Tested by LAB to their customer Easy way to design ,Installation&Total Cost is economical,Maintenance very easy.
Many countries adopted in their Standard.
Manufacturer who is supporting products with LAB Certificate should only entertain many companies in India Supply submitting Forged Certificate .
Indian Government Agencies Releasing Tender for ESE Lighting Solar PV Project , Power Substation Transmission and Distribution , Railway &Metro Rail Projects,
NBC2016 BIS who is influence with IEC not included and cheated Indian Government&Partial approach because of Low Knowledge about Lightning Design&Selection of Products.
Contact us
This document discusses electrical discharge machining (EDM). It summarizes key parameters and concepts in EDM processes. The parameters that influence EDM include supply voltage, breakdown voltage, charging resistance, capacitance, gap setting, electrode material, electrode movement, electrode wear, dielectric fluid, flushing method, process parameters like current and pulse duration, types of EDM like wire EDM, factors that influence material removal rate and surface integrity like surface roughness, recast layer and heat affected zone. The document also discusses characteristics of EDM processes.
Water-based coatings are increasingly replacing solvent-based coatings due to legislation aimed at reducing VOC emissions from solvents. Water-based coatings contain 98% less VOCs and no hazardous isocyanates. They are safer for the environment and employees' health. While water-based coatings traditionally take longer to dry, microwave drying technology can reduce drying time to less than 15 minutes, matching solvent-based coating drying times in an environmentally friendly way. Switching to water-based coatings helps organizations comply with increasing environmental regulations in a cost-effective manner.
This document discusses coating and laminating processes for paper and films. It describes several methods including extrusion coating, thermal laminating, wet bond laminating, dry bonding, solventless laminating, and extrusion laminating. Extrusion coating is commonly used to apply polyethylene to paperboard with benefits over wax coating like greater strength and moisture resistance. Laminating combines webs using thermal or chemical bonding with adhesives. Thermal laminating uses heat to bond adhesives while wet bond laminating relies on water or solvent. Dry bonding and solventless laminating avoid volatile organic compounds. The document also discusses factors in dry surface treatment coating like particle size and heat treatment to achieve an adequate coating layer.
Toxicity of dyestuffs and textile dyes
Textile dyes comprise over 8,000 compounds used in textiles like cotton. Reactive dyes used for cellulose fibers have been found to cause adverse health effects in textile workers and environmental toxicity. Some dyes like azo dyes contain compounds that are carcinogenic and cause allergic reactions, respiratory diseases, and immunoglobulin level changes in exposed workers. Dyes can also contain heavy metals and other toxic chemicals that are absorbed through the skin and cause symptoms like rashes, headaches, and organ damage. Intestinal bacteria can break down azo dyes in particular and produce carcinogenic metabolites, demonstrating the toxicity risks of dye degradation products to
Minyak atsiri merupakan zat beraroma yang diekstrak dari berbagai bagian tumbuhan seperti daun, bunga, akar, dan buah. Minyak atsiri memiliki berbagai manfaat untuk industri obat-obatan, parfum, makanan, dan lainnya. Teknologi pengolahan minyak atsiri meliputi pemanenan, pengeringan, ekstraksi, penyaringan, dan penyimpanan untuk memperoleh minyak atsiri dengan kualitas terba
Water has unique properties due to its molecular structure as a polar covalent molecule. It can form hydrogen bonds between molecules which allow it to absorb large amounts of heat as it changes phases and gives it high surface tension and ability to dissolve many solutes. These hydrogen bonds are what allow water to have unusual properties like floating ice and temperature moderation.
Innovations in coating technology for graphic artAdesh Katariya
The document discusses innovations and trends in coating technology for graphic art. It describes different types of coatings categorized by their formulation (e.g. solvent-based, water-based), application process (e.g. gravure, flexo), and end use. New trends include UV-curable coatings that provide special visual effects like texture, soft-feel, and thermochromic properties. The document also discusses opportunities for aqueous and solvent-based coatings, as well as growth in the Asia-Pacific coating market led by China, India, Japan, and Korea.
The document summarizes a presentation about sustainability in the textile industry. It discusses current challenges around managing environmental, health and safety issues. It introduces the bluesign standard, which takes a holistic approach to sustainability by focusing on optimizing input streams and processes throughout the textile production chain. The standard aims to increase transparency, reduce resource usage, and move the industry towards best available technologies.
This document provides a summary of denim trends for Summer 2012, as reported by Stylesight. Key trends include 1950s leisurewear influences like Hawaiian shirts and higher-waisted jeans. Maritime styles are also popular, featuring navy blues and detailing. For women, prairie-inspired silhouettes like full-length skirts are trending. Popular items include grafter shirts, gang jackets, lightweight pants, and prepster shorts. Fabric trends incorporate salt-and-pepper constructions and indigo patterns. Styling takes cues from naval, sartorial workwear and Tokyo prairie aesthetics.
RadiciSpandex is a textile company that takes sustainability seriously through recycling initiatives, innovations to reduce waste, and producing colored spandex that uses less dye. It recycles manufacturing waste, reuses packaging materials, and sources materials domestically to lower its carbon footprint. As part of its parent company RadiciGroup, it adheres to eco-friendly practices including reducing emissions, optimizing processes, and pursuing renewable energy and paperless communication.
This research analyzes how classroom practice affects students' brains and knowledge retention. Surveys of teachers at Douglas Intermediate School showed the varying amounts of daily practice time used for reading and math. Research indicates practice builds neural connections and improves learning. The study identifies curriculums available for guided practice and recommends recognizing practice's benefits, utilizing existing programs, and providing teacher training to increase practice and student success.
Short red dresses can attract male attention according to studies. Men rated women wearing red as more interested in sex, showing humans may associate red with fertility. For thousands of years women have used red lipstick and blush, and red is often used in Valentine's Day cards, suggesting biology underlies the response. When female primates near fertility their estrogen peaks, flushing their faces red to signal males it is time to mate. The same biological mechanism may explain why men in studies were drawn more to women in modest long red dresses than other colors like white.
How to Select an Intrinsically Safe Pressure TransducerSetra Systems
Engineers selecting pressure transducers in hazardous industries must make one more significant consideration beyond performance, reliability, and stability-they must specify units with intrinsically safe circuits. The National Electrical Code defines an intrinsically safe circuit as, "A circuit in which any spark or thermal effect is incapable of causing ignition of a mixture of flammable or combustible material in air under prescribed conditions." In addition, intrinsically safe products are incapable of storing large amounts of energy that might spark an explosion when discharged. These circuits must be used wherever there are combustible gases, vapors, liquids, dust, and/or fibers.
This paper discusses what industries and applications require intrinsically safe systems and the technical considerations for specifying an intrinsically safe pressure transducer.
The document discusses lightning protection for wind turbines. It covers the new IEC 61400-24 standard which will require lightning testing for entire wind turbine systems. Analysis of lightning damage to over 500 turbines found that delamination and shell debonding were the most common types of damage. Explanations of failure mechanisms show that improper insulation allows lightning leaders to initiate from internal parts rather than just receptors. The presentation emphasizes the importance of robust lightning protection system design, testing, monitoring, and maintenance.
The document provides information from a National Electrical Code forum, including responses to questions from attendees. The responses are provided by a panel of electrical code experts who discuss NEC code requirements and acceptable wiring practices. Some of the questions addressed include grounding requirements, use of certain wiring methods and materials, and installation of equipment in hazardous locations.
The document provides information on hazardous area classification standards and compares the International Electrotechnical Commission (IEC) Zone system to the National Electric Code (NEC) Class/Division system. It defines IEC Zones 0, 1, and 2 and examples of how different areas would be classified. Protection techniques like flameproof, increased safety, and intrinsic safety used in both systems are also discussed. Charts are included that compare gas groups, temperature classifications, equipment standards, and protection methods between the IEC and NEC/Canadian Electric Code systems.
This document discusses methods used to minimize arc flash hazards in an electrical switchroom for a basalt crushing and screening plant. It describes implementing multiple risk controls following the hierarchy of hazard control, including installing an arc flash rated switchboard with features like arc venting, segregation and arc flash reduction technology. The design used studies to reduce fault current and clearing times, and allowed remote operation and monitoring to minimize worker exposure. This combination of engineering and administrative controls successfully lowered hazard categories, reducing required personal protective equipment without compromising coordination.
The document discusses electrical safety rules for substations. It provides 6 key rules: (1) ensuring clearance from energized parts, (2) maintaining a minimum height of energized parts from the ground, (3) providing sufficient illumination, (4) ensuring wide and clear passageways and evacuation routes, (5) proper grounding of all metallic structures, and (6) marking exits clearly. It also discusses important points for a safe work environment, such as using safety equipment, checking faulty equipment, and ensuring only competent workers perform electrical tasks. The document further explains components like lightening arresters, instrument transformers, power transformers, disconnectors, and circuit breakers.
In this Webinar, Epec will address what functions the outer sheath or jacket of a cable assembly serves. These functions will include safety certification and environmental requirements and what function the jacket serves in meeting these.
We will also discuss the various materials available to employ for the jacket and the ramifications of choosing one material over another.
To learn more information on our cable assembly solutions visit http://www.epectec.com/cable-assemblies/.
Photovoltaic Training Course - Module 4.3 - Types of maintenanceLeonardo ENERGY
The document discusses preventive maintenance for photovoltaic systems, emphasizing its importance during plant design, component supply and reception, and operation. It provides checklists for considerations during design like module guarantees, equipment guarantees, and insurance. During operation, it recommends defining maintenance tasks, record keeping, staff training, incident detection mechanisms, and monitoring the electric grid for outages.
Our speaker this week is David Peng. David has more than 25 years of experience in the electronics industry, 15 of which were at EMS companies. At Foxconn, he led 60 R&D teams, and served as a Sony strategy product PM for more than 2 years. David's also led the product management and marketing departments at LiteOn Corp and Jabil Circuit for many years. He has rich knowledge and experience in designing products, marketing promotion, and project management. David has now established SlingX Corp. with his partner, Wade Ho, to share their experiences and contacts to provide quality services and advice to startups and entrepreneurs.
Most lectures tell startups and entrepreneurs they should follow the PLM design processes, but rarely tell them “how” to design a good product. In his talk, David wants to discuss 8 key processes in designing a product from the viewpoint of design and project management.
The document discusses arc flash hazards, defining an arc flash as a dangerous condition caused by an electric arc. It provides information on what causes arc flashes, the governing agencies that regulate arc flash safety, and how to determine arc flash boundaries and label equipment. The company discussed provides arc flash safety services like analyses, training, and labeling to help clients comply with safety standards.
1) Arc flash explosions occur daily and can cause severe burns, so proper protective equipment and safety protocols are necessary when working with energized electrical equipment.
2) An arc flash is a dangerous explosion that occurs when electricity passes through air, reaching temperatures over 35,000°F. Proper labeling and safety training are required by OSHA and NFPA to prevent injuries.
3) Team Fishel provides arc flash safety solutions such as analyses, labeling, training, and recommendations to help clients comply with regulations and improve workplace safety around electrical hazards.
Minyak atsiri merupakan zat beraroma yang diekstrak dari berbagai bagian tumbuhan seperti daun, bunga, akar, dan buah. Minyak atsiri memiliki berbagai manfaat untuk industri obat-obatan, parfum, makanan, dan lainnya. Teknologi pengolahan minyak atsiri meliputi pemanenan, pengeringan, ekstraksi, penyaringan, dan penyimpanan untuk memperoleh minyak atsiri dengan kualitas terba
Water has unique properties due to its molecular structure as a polar covalent molecule. It can form hydrogen bonds between molecules which allow it to absorb large amounts of heat as it changes phases and gives it high surface tension and ability to dissolve many solutes. These hydrogen bonds are what allow water to have unusual properties like floating ice and temperature moderation.
Innovations in coating technology for graphic artAdesh Katariya
The document discusses innovations and trends in coating technology for graphic art. It describes different types of coatings categorized by their formulation (e.g. solvent-based, water-based), application process (e.g. gravure, flexo), and end use. New trends include UV-curable coatings that provide special visual effects like texture, soft-feel, and thermochromic properties. The document also discusses opportunities for aqueous and solvent-based coatings, as well as growth in the Asia-Pacific coating market led by China, India, Japan, and Korea.
The document summarizes a presentation about sustainability in the textile industry. It discusses current challenges around managing environmental, health and safety issues. It introduces the bluesign standard, which takes a holistic approach to sustainability by focusing on optimizing input streams and processes throughout the textile production chain. The standard aims to increase transparency, reduce resource usage, and move the industry towards best available technologies.
This document provides a summary of denim trends for Summer 2012, as reported by Stylesight. Key trends include 1950s leisurewear influences like Hawaiian shirts and higher-waisted jeans. Maritime styles are also popular, featuring navy blues and detailing. For women, prairie-inspired silhouettes like full-length skirts are trending. Popular items include grafter shirts, gang jackets, lightweight pants, and prepster shorts. Fabric trends incorporate salt-and-pepper constructions and indigo patterns. Styling takes cues from naval, sartorial workwear and Tokyo prairie aesthetics.
RadiciSpandex is a textile company that takes sustainability seriously through recycling initiatives, innovations to reduce waste, and producing colored spandex that uses less dye. It recycles manufacturing waste, reuses packaging materials, and sources materials domestically to lower its carbon footprint. As part of its parent company RadiciGroup, it adheres to eco-friendly practices including reducing emissions, optimizing processes, and pursuing renewable energy and paperless communication.
This research analyzes how classroom practice affects students' brains and knowledge retention. Surveys of teachers at Douglas Intermediate School showed the varying amounts of daily practice time used for reading and math. Research indicates practice builds neural connections and improves learning. The study identifies curriculums available for guided practice and recommends recognizing practice's benefits, utilizing existing programs, and providing teacher training to increase practice and student success.
Short red dresses can attract male attention according to studies. Men rated women wearing red as more interested in sex, showing humans may associate red with fertility. For thousands of years women have used red lipstick and blush, and red is often used in Valentine's Day cards, suggesting biology underlies the response. When female primates near fertility their estrogen peaks, flushing their faces red to signal males it is time to mate. The same biological mechanism may explain why men in studies were drawn more to women in modest long red dresses than other colors like white.
How to Select an Intrinsically Safe Pressure TransducerSetra Systems
Engineers selecting pressure transducers in hazardous industries must make one more significant consideration beyond performance, reliability, and stability-they must specify units with intrinsically safe circuits. The National Electrical Code defines an intrinsically safe circuit as, "A circuit in which any spark or thermal effect is incapable of causing ignition of a mixture of flammable or combustible material in air under prescribed conditions." In addition, intrinsically safe products are incapable of storing large amounts of energy that might spark an explosion when discharged. These circuits must be used wherever there are combustible gases, vapors, liquids, dust, and/or fibers.
This paper discusses what industries and applications require intrinsically safe systems and the technical considerations for specifying an intrinsically safe pressure transducer.
The document discusses lightning protection for wind turbines. It covers the new IEC 61400-24 standard which will require lightning testing for entire wind turbine systems. Analysis of lightning damage to over 500 turbines found that delamination and shell debonding were the most common types of damage. Explanations of failure mechanisms show that improper insulation allows lightning leaders to initiate from internal parts rather than just receptors. The presentation emphasizes the importance of robust lightning protection system design, testing, monitoring, and maintenance.
The document provides information from a National Electrical Code forum, including responses to questions from attendees. The responses are provided by a panel of electrical code experts who discuss NEC code requirements and acceptable wiring practices. Some of the questions addressed include grounding requirements, use of certain wiring methods and materials, and installation of equipment in hazardous locations.
The document provides information on hazardous area classification standards and compares the International Electrotechnical Commission (IEC) Zone system to the National Electric Code (NEC) Class/Division system. It defines IEC Zones 0, 1, and 2 and examples of how different areas would be classified. Protection techniques like flameproof, increased safety, and intrinsic safety used in both systems are also discussed. Charts are included that compare gas groups, temperature classifications, equipment standards, and protection methods between the IEC and NEC/Canadian Electric Code systems.
This document discusses methods used to minimize arc flash hazards in an electrical switchroom for a basalt crushing and screening plant. It describes implementing multiple risk controls following the hierarchy of hazard control, including installing an arc flash rated switchboard with features like arc venting, segregation and arc flash reduction technology. The design used studies to reduce fault current and clearing times, and allowed remote operation and monitoring to minimize worker exposure. This combination of engineering and administrative controls successfully lowered hazard categories, reducing required personal protective equipment without compromising coordination.
The document discusses electrical safety rules for substations. It provides 6 key rules: (1) ensuring clearance from energized parts, (2) maintaining a minimum height of energized parts from the ground, (3) providing sufficient illumination, (4) ensuring wide and clear passageways and evacuation routes, (5) proper grounding of all metallic structures, and (6) marking exits clearly. It also discusses important points for a safe work environment, such as using safety equipment, checking faulty equipment, and ensuring only competent workers perform electrical tasks. The document further explains components like lightening arresters, instrument transformers, power transformers, disconnectors, and circuit breakers.
In this Webinar, Epec will address what functions the outer sheath or jacket of a cable assembly serves. These functions will include safety certification and environmental requirements and what function the jacket serves in meeting these.
We will also discuss the various materials available to employ for the jacket and the ramifications of choosing one material over another.
To learn more information on our cable assembly solutions visit http://www.epectec.com/cable-assemblies/.
Photovoltaic Training Course - Module 4.3 - Types of maintenanceLeonardo ENERGY
The document discusses preventive maintenance for photovoltaic systems, emphasizing its importance during plant design, component supply and reception, and operation. It provides checklists for considerations during design like module guarantees, equipment guarantees, and insurance. During operation, it recommends defining maintenance tasks, record keeping, staff training, incident detection mechanisms, and monitoring the electric grid for outages.
Our speaker this week is David Peng. David has more than 25 years of experience in the electronics industry, 15 of which were at EMS companies. At Foxconn, he led 60 R&D teams, and served as a Sony strategy product PM for more than 2 years. David's also led the product management and marketing departments at LiteOn Corp and Jabil Circuit for many years. He has rich knowledge and experience in designing products, marketing promotion, and project management. David has now established SlingX Corp. with his partner, Wade Ho, to share their experiences and contacts to provide quality services and advice to startups and entrepreneurs.
Most lectures tell startups and entrepreneurs they should follow the PLM design processes, but rarely tell them “how” to design a good product. In his talk, David wants to discuss 8 key processes in designing a product from the viewpoint of design and project management.
The document discusses arc flash hazards, defining an arc flash as a dangerous condition caused by an electric arc. It provides information on what causes arc flashes, the governing agencies that regulate arc flash safety, and how to determine arc flash boundaries and label equipment. The company discussed provides arc flash safety services like analyses, training, and labeling to help clients comply with safety standards.
1) Arc flash explosions occur daily and can cause severe burns, so proper protective equipment and safety protocols are necessary when working with energized electrical equipment.
2) An arc flash is a dangerous explosion that occurs when electricity passes through air, reaching temperatures over 35,000°F. Proper labeling and safety training are required by OSHA and NFPA to prevent injuries.
3) Team Fishel provides arc flash safety solutions such as analyses, labeling, training, and recommendations to help clients comply with regulations and improve workplace safety around electrical hazards.
The document provides an overview of partial discharge detection as part of condition-based maintenance of electrical equipment. It discusses concepts like partial discharge mechanisms, the components used for partial discharge detection, and how online partial discharge detection can help monitor insulation health and provide early warnings of degradation. The document also covers topics like common types of partial discharges, how insulation defects can lead to partial discharges, and how partial discharges gradually deteriorate insulation over time if not addressed.
This document provides details about various tests conducted as part of an internship project at Philips Lighting Limited, including surge testing, strife testing, thermal testing, and reliability testing. Surge testing detects insulation deterioration in motors to identify failures early. Strife testing subjects products to stresses beyond expected use conditions to find design weaknesses. Thermal testing uses infrared cameras to detect temperature differences that can indicate issues. Reliability testing calculates failure probability and mean time between failures to evaluate a software's ability to function over time. The document also explains flyback converter operation and limitations of continuous and discontinuous modes.
Electrical Safety and NFPA 70E Study Sheet v2.0Richard Gould
This document summarizes key aspects of electrical safety and NFPA 70E standards. It defines protection boundaries for arc flash and shock hazards. It describes personal protective equipment (PPE) categories and their arc flash ratings. It outlines six steps for establishing an electrically safe work condition (ESWC) including securing energy sources, verifying de-energization, and grounding/dissipating residual energy. It also reviews questions workers should ask themselves regarding qualifications, test equipment, PPE, necessity of working energized, and verifying an ESWC is established. Regulations, references and standards are listed that provide requirements for electrical safety in the workplace.
This document provides information on fire protection equipment used in electric substations. It discusses the importance of electricity as critical infrastructure and the objectives of transmission utilities. It then covers various aspects of fire prevention and fighting including standards, elimination of electric fire hazards, grounding practices, and maintenance procedures. The document also describes classifications of fires according to different materials involved and appropriate extinguishing methods. Finally, it explains different types of fire extinguishing equipment like water, foam, dry chemical powder, carbon dioxide, and their mechanisms of fire extinction.
The document discusses refrigeration and air conditioning systems. It covers various topics like atmosphere, environment, safety, electricity, tools used, and types of refrigeration and air conditioning. It provides information on general safety practices like following written EHS policies, 5S methodology for workplace organization, and types of fire extinguishers. It also describes electrical safety practices including circuit protection devices, personal protective equipment and relay operations.
The electrical arc creates a pressure wave. The incident energy is the energy of this arc-flash coming into contact with a surface. Essentially an electric arc creates a radiation burn which accounts for the internal burns a person can receive when exposed to an electrical arc flash.
MSI GP60 Leopard (GTX 950M) manual PDF download / User Guidemanualsheet
This document provides information about a notebook user's manual, including preface, contents, regulations, safety instructions, and revision history in Chapter 1. Chapter 2 introduces the notebook, including an overview of its top-open view, front/side views, specifications, and accessories. Chapter 3 covers getting started with the notebook, including power management, basic operations, safety tips, using the keyboard, touchpad, hard drive, optical drive, and connecting external devices.
MSI GP60 Leopard (GT940M) User Manual PDF Download / User Guidemanualsheet
This document provides a user manual for a notebook. It includes chapters on safety instructions, an overview of the notebook including descriptions of its external features and buttons, and instructions for basic operations. The overview chapter describes the notebook's top-open view including components like the webcam, speakers, power button, and touchpad. It also provides the notebook's specifications. The getting started chapter includes instructions for power management, using the keyboard and touchpad, connecting external devices, and replacing components.
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1. DESIGN CONSIDERATIONS IN
SOLVENT VS. WATER BASE
COATING EQUIPMENT
Robert A. Pasquale
President
New Era Converting Machinery
P.O. Box 377
Hawthorne, NJ 07507
2. Overview
Many factors must be considered when designing,
fabricating, installing and operating a coating line
used to apply solvent based coatings.
We will cover many of these requirements and how they
compare to water based coating systems. We will include
discussions on:
•How the areas that require special design are established
•What special considerations are required to address
these areas
3. What are solvent based and
water based coatings?
Many of the coatings that are applied to webs substrates
consist of particulate matter suspended in a liquid
carrier. The distinction between these two types of
coatings is based on whether the carrier is water or
solvent(s).
4. Advantages of Solvent Based Coatings
Solvent based coatings offer several advantages over
water based coatings including:
•They wet-out better, making them more applicable for consistent
overall coatings
•Typically require less energy to remove allowing for lower
drying temperatures, shorter dryers and/or faster speeds
•Solvent based adhesives typically have better performance
characteristics such as higher shear/peel strength and greater
moisture resistance
5. Disadvantages of Solvent Based Coatings
Though solvent based coatings offer several advantages
over water based coatings, there are several
disadvantages including:
•They contain harmful VOCs (Volatile Organic Compounds)
•They release flammable/explosive vapors/gases
•Safeguards required lead to more expensive coating equipment
6. Design Considerations
When designing a system for applying solvent based
coatings the following major design requirements need
to be addressed:
• The flammability/explosive issue
• The operators’ exposure to the solvents
• The release of VOCs to the environment
7. Design Considerations
We will briefly discuss the design of the drying
equipment required for solvent versus water based
coatings.
We will also address the design of the equipment to
prevent excess corrosion when exposed to the
coatings.
8. Equipment Design to Address Solvent Flammability
Of major concern is the potential of electrical
components producing sparks in areas where solvent
vapors/gases may be present. In the U.S. the NEC
(National Electric Code) and in Canada the Canadian
Electric Code (CEC) sets guidelines that:
•Define the areas where special electrical practices are required
•Define the electrical practices in those areas
9. Equipment Design to Address Solvent Flammability
The National Electrical Code (NEC) and the Canadian
Electrical Code (CEC) defines hazardous areas as the
following:
An area where a potential hazard (e.g., a fire, an explosion, etc.)
may exist under normal or abnormal conditions because of the
presence of flammable gases or vapors, combustible dusts or
ignitable fibers or flyings.
10. Equipment Design to Address Solvent Flammability
Class Definition
The NFPA Publication 70, NEC, and CEC define three categories
(Classes) of hazardous materials. The Classes define the type of
explosive or ignitable substances which are present in the
atmosphere such as:
– Class I locations are those in which flammable vapors and
gases may be present.
– Class II locations are those in which combustible dust may be found.
– Class III locations are those which are hazardous because of the
presence of easily ignitable fibers.
11. Equipment Design to Address Solvent Flammability
Division Definition
Each of the three Classes is further subdivided into two Divisions.
The Division defines the likelihood of the hazardous material
being present in a flammable concentration.
– Division 1 - In which ignitable concentrations of hazards exists under
normal operation conditions and/or where hazard is caused by frequent
maintenance or repair work or frequent equipment failure
– Division 2 - In which ignitable concentrations of hazards are handled,
processed or used, but which are normally in closed containers or closed
systems from which they can only escape through accidental rupture or
breakdown of such containers or systems.
12. Equipment Design to Address Solvent Flammability
Hazardous Area
Plan View
Elevation View
13. Equipment Design to Address Solvent Flammability
Electrical Devices in the Hazardous Area
There are four classifications for the design/use of electrical
components which are:
•Explosion Proof (XP) – designed and rated for use in a hazardous
area
•Intrinsically Safe (IS) – designed so the electrical energy
required by the device is below that requires to set off an
explosion/ignition
•Air Purged – designed so that the electrical device is kept under
positive pressure with non-solvent laden air
•Standard/General Purpose – no special design for preventing
contact with/ignition of vapors or gases
14. Equipment Design to Address Solvent Flammability
Electrical Devices in the Hazardous Area
ENVIROMENT
DEVICE NON-HAZARDOUS
CLASS I, GROUP D, DIVISION
II CLASS I, GROUP D, DIVISION I
AC Motors open, drip-proof or TENV open, drip-proof or TENV* XP
Electric Brakes Standard/General Purpose Standard/General Purpose* XP
Solenoids and Valves Standard/General Purpose Standard/General Purpose* XP, IS or in an XP or purged housing
Electric Clutches Standard/General Purpose Standard/General Purpose* XP or purged
Force Transducers Standard/General Purpose Standard/General Purpose*** XP or IS
Junction Boxes Standard/General Purpose Standard/General Purpose⁺ XP
DC Motors Standard/General Purpose XP XP
DC Tachometers Standard/General Purpose XP XP
Limit Switches Standard/General Purpose XP or IS XP or IS
Pushbottons Standard/General Purpose XP or IS XP or IS
Relays Standard/General Purpose Housed in an XP or purged encl. Housed in an XP or purged encl.
Slip Rings Standard/General Purpose Purged Purged
Encoders Standard/General Purpose Standand* XP
HMIs Standard/General Purpose Standard** Purged
⁺ = provided the device is rated as per NEC 501.10
* = if device is approved for use in Class I, Group D, Division II environment: if not, then it must be XP
** = if device is approved for use in Class I, Group D, Division II environment: if not, then it must be purged
*** = Must be wired to an IS barrier or a Class 1, Group D, Division II device
15. Equipment Design to Address Solvent Flammability
Wiring in the Hazardous Area
Class I, Division I:
•Wiring must be totally enclosed in appropriately rated conduits
and fittings
•Conduits need to be sealed at the hazardous area boundary and
device
•The above rules do not apply when using IS devices, which can
be wired using general purpose conduits and fittings as long as
seal offs are provided at the hazardous area boundary and the IS
wiring is isolated from all other wiring
16. Equipment Design to Address Solvent Flammability
Wiring in the Hazardous Area
Class I, Division II:
•General purpose conduit and fittings can be used as long as seal
offs are used at each potential spark generating device
17. Equipment Design to Address Solvent Flammability
Coater Wired for Non-Hazardous Area Coater Wired for Class I, Group D, Division I
18. Equipment Design to Address Solvent Flammability
General Comments
•Devices that are rated for use in an XP area are more costly than
those that are rated General Purpose
•The material and labor costs associated with wiring in an XP area
are higher than a General Purpose area
•In addition to the electrical components, one needs to address
static electricity as a potential source of ignition
19. Equipment Design to Address Solvent Flammability
General Comments
•It is important that all personnel and hardware in the area is
properly grounded
•Portable electronic devices should be restricted in the hazardous
area.
•The use of typical water based coatings eliminated the need for
the use of special devices and wiring.
20. Design of the Equipment for Operator Health
Exposure to solvent has short and long term
health effects such as:
•Irritation of the skin, eyes, nose, and throat
•Headaches
•Nausea
•Damage to the liver, kidney, lungs and
central nervous system
Because of this the equipment should be designed to
minimize the operators’ exposure to the solvents
21. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Personal Protection Equipment
The use of personal protection equipment (glasses, gloves,
respirators, etc.) is the most basic form of limiting operators’
exposure. However, the use of this equipment can reduce the
operators’ ability to perform the required tasks associated with the
operation of the coating equipment.
22. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Ventilation Equipment
The use of ventilation equipment local to the coater is often used
to reduce the operators’ exposure. However, this too has its
disadvantages.
•Placing exhaust hoods over the coater has several issues:
– Since solvent vapors are typically heavier than air an overhead hood is
typically ineffective at capturing them.
– If the hood is strong enough to capture some of the solvent vapors, it
often drags the vapors past the operators’ face.
•Providing ventilation at the bottom of the coater is more effective
at capturing the heavier than air solvent vapors but may not
reduce the operators’ exposure enough.
23. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Exhausted Enclosure
The use of an exhausted enclosure around the coating station to
protect the operator and capture the solvents can be very effective.
These enclosures are typically of one of three designs.
•Area type enclosure
– Surrounds both the coater and the operator area around it.
– These enclosures require the operator to enter them in order to
make adjustments to the coater, therefore still requiring the use of
personal protection equipment when doing such.
24. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Exhausted Enclosure
The use of an exhausted enclosure around the coating station to
protect the operator and capture the solvents can be very effective.
These enclosures are typically of one of three designs.
•Area type enclosure
25. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Exhausted Enclosure
The use of an exhausted enclosure around the coating station to
protect the operator and capture the solvents can be very effective.
These enclosures are typically of one of three designs.
•Close fitting type with access doors
– Designed to fit tightly around the coater but requires the operator
to open doors/hatches to make adjustments.
– Design limits the operators’ exposure during operation but it
doesn’t eliminate it (during adjustments).
– Exposure can be reduced by using a multi-speed exhaust fan that
increases in capacity when the access doors/hatches are open.
26. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Exhausted Enclosure
The use of an exhausted enclosure around the coating station to
protect the operator and capture the solvents can be very effective.
These enclosures are typically of one of three designs.
•Close fitting type with access doors
27. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Exhausted Enclosure
The use of an exhausted enclosure around the coating station to
protect the operator and capture the solvents can be very effective.
These enclosures are typically of one of three designs.
•Close fitting type with external adjustments
– Controls required for adjusting located outside the enclosure.
– Operator exposure to the vapors/gases is all but eliminated during
operation.
– Only time that access is required inside the enclosure is during
maintenance.
28. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Exhausted Enclosure
The use of an exhausted enclosure around the coating station to
protect the operator and capture the solvents can be very effective.
These enclosures are typically of one of three designs.
•Close fitting type with external adjustments
29. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Exhausted Enclosure
The use of an enclosure around the solvent source redefines the
previously described electrical classifications:
•The Class I, Group D, Division I area is limited to inside the
enclosure
•The Class I, Group D, Division II area is significantly smaller
and is related to the location of the enclosure openings.
30. Design of the Equipment for Operator Health
Methods to Limit Operators’ Exposure
Exhausted Enclosure
The use of an enclosure around the solvent source redefines the
previously described electrical classifications:
Plan View
Elevation View
31. Design of the Equipment for Operator Health
General Comments
•Certain features need to be included in the design of a coater
enclosure including:
– The use of safety glass
– Adequate explosion relief panels/surfaces
– The use of solvent level monitoring equipment (LFL monitors)
•When using water based coatings:
– The need for personal protection equipment is greatly reduced
– The need for ventilation equipment and/or coater enclosures is
also greatly reduced
32. Design of Equipment for Emissions
The design of the coating system for the capture and abatement of
the solvent vapors/gases is extremely important in order to
prevent them from being released to the atmosphere.
The use of the previously discussed ventilation equipment and/or
coater enclosure allows for the capture of these vapors/gases in
the exhaust air stream. Once captured, there are several ways to
deal with these vapors/gases, including:
•Recovery - the solvent vapors/gases are separated from the air
stream so that they can be collected either for destruction or reuse
•Destruction - allows for the destruction of the vapors/gases
present in the air stream (incineration)
33. Design of Equipment for Emissions
General Comments
•The air stream that exits these sections is typically combined
with the air stream(s) from the drying equipment and fed to a
common collection or destruction unit.
•Because the air stream from the coater exhaust system is often
low in solvent content, it is common to use this air to feed the
drying recirculating system, allowing for the solvent content to
raise, helping to minimize the size of the abatement equipment.
•With typical water base coatings, since there are no harmful
vapors/gases being release, there is no need for abatement
equipment.
34. Drying Equipment for Solvent Based
and Water Based Coatings
Design differences of solvent versus water based drying systems
is a very large topic of discussion which deserves its own paper.
However, there are several major differences that we can briefly
touch on:
•Solvents typically take much less energy to remove, allowing for
lower drying temperatures, shorter dryers and/or faster speeds.
•Solvent based dryer required the inclusion of explosion relief
panels.
•Prior to operation, solvent based dryers need to go through a
purge cycle to make sure that no residual solvents are present.
35. Drying Equipment for Solvent Based
and Water Based Coatings
Design differences of solvent versus water based drying systems
is a very large topic of discussion which deserves its own paper.
However, there are several major differences that we can briefly
touch on:
•The solvent dryer’s air handling equipment needs to be designed
to assure that the levels of solvent in the air never go above a
certain percentage and may require LFL monitors.
•The air stream exhausted from the solvent dryer needs to be fed
to an abatement system.
•The internals of a dryer for water based coatings needs to be
designed to prevent corrosion, with stainless steel often being
used.
36. Equipment Design for Corrosion Resistance
Equipment used with solvent or water based coatings needs to be
designed to address the detrimental effects of exposure to these
coatings. Examples of this are:
•For solvent based coatings – Certain solvents attack mild steel.
Therefore special coatings or materials of construction may need
to be employed.
•For water based coatings - The concern of corrosion due to
oxidation should be addressed either through coatings such as
chrome, etc. applied to the mild steel, through the use of special
materials of construction such as stainless steel or by cladding
exposed surfaces with stainless steel.
38. Conclusions
There are many factors that need to be considered
when designing a system to handle solvent based
coatings. Care must be taken to assure that
fires/explosions will not occur, that the operators will
not be exposed to the solvent vapors/gases and that the
vapors/gases are properly captured so that they are not
released into the environment. In addition the coater
should be designed to prevent excessive corrosion that
may occur from contact with the coating.
39. Acknowledgment
We acknowledge the following references:
www.exmanlift.com
National Fire Protection Association’s National Electric
Code handbook 13th edition
Canadian Standards Association’s Canadian Electrical
Code 22nd edition