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******** October 10th, 2016 - Added a section on how to set and check clearance and creepage in a PCB Design CAD Software. Section name "PCB CAD/CAM SOFTWARE - CLEARANCE AND CREEPAGE"
******** Published in May 1, 2016 ********
Being a capable electronics designer does not make you a good one.
Being an expert in Arduino, Raspberry, firmware, embedded software and microcontrollers, hardware, PCB design, digital and analog design, is only a part of what designers need to know.
A beautiful and functional product can be appealing, but if basic safety rules are not taken into account even before starting the actual design activities, a poor design can endanger people and cause its designer big troubles.
This course focuses on design safety with respect to electrical/electronics application, including PCB design. It covers the most important aspects that designers need to know, and it teaches a general methodology to develop electronics and electrical applications (including PCB) in compliance with safety principles and international standards.
+++++ Have a look at the course curriculum +++++
At the end of the course:
so basically you will be able to design a functional, safe and ready for the market electrical application.
HAVE A LOOK AT THE LESSONS AVAILABLE FOR FREE IN THE COURSE CURRICULUM !!!
We will introduce the basic concepts and techniques of electrical, electronics and PCB design for safety, teaching you the path to a project compliant with product safety legislation.
We will cover both basic electrical definitions like the product classification and more advance concepts like creepage calculation and critical electronics components.
Throughout the course you will find practical examples on how to use these techniques on electrical and electronics household appliances design (e.g. food mixers and electric toasters), and also how to set some parameters in a CAD/CAM Software for PCB design.
We will take as a reference the most important and recognised international safety standards, like IEC 60335 series, IEC 60529, and the like.
The last section will be dedicated to describe the whole design process, from the design specifications to final verification and validation, with a practical example on an electric toaster design.
The course is made essentially of video lessons, but reference to guidelines and datasheets are provided, when considered useful.
You will also find several tests. We strongly recommend to take the tests before proceeding to check the concept you have learned.
If you really want to understand the safety related part of an electrical/electronics and PCB design and complete your technical culture with this important cornerstone, this course is a must.
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Certificate of completion.
|Section 1: INTRODUCTION|
|Section 2: GENERAL INTRODUCTION|
SECTION INTRODUCTION AND EFFECT OF CURRENT AND ELECTRICAL MODEL OF HUMAN BODYPreview
INSULATION (OR ISOLATION)
GENERAL SAFETY REQUIREMENT CLAUSE AND DOUBLE IMPROBABILITY & SECTION WRAP UPPreview
|Section 3: TYPES OF INSULATION|
REINFORCED INSULATION & SECTION WRAP UP
|Section 4: PRODUCT CLASSIFICATION|
SECTION INTRODUCTION, DEFINITION OF ACCESSIBLE & LIVE PARTS, SUPPLY CORDSPreview
CLASS 0 PRODUCTS
CLASS I PRODUCTSPreview
CLASS 0I PRODUCTS
CLASS II PRODUCTS
CLASS III (SELV) PRODUCTS
LABELS/SYMBOLS & SECTION WRAP UP
|Section 5: EARTH CONNECTION|
|Section 6: ELECTRIC STRENGTH, INSULATION RESISTANCE, LEAKAGE & TOUCH CURRENTS|
SECTION INTROUCTION AND ELECTRIC STRENGTHPreview
INSULATION RESISTANCE AND LEAKAGE CURRENTS
TOUCH CURRENTS AND EARTH LEAKAGE CURRENTS
Touch currents and earth leakage currents
EXAMPLES & SECTION WRAP UP
|Section 7: CLEARANCE DISTANCE|
SECTION INTRODUCTION, CLEARANCE AND PARAMETERS INFLUENCING ITPreview
OVERVOLTAGE CATEGORIES & SECTION WRAP UPPreview
|Section 8: CLEARANCE DISTANCE CALCULATION PROCEDURE|
SECTION INTRODUCTION AND PRODUCT PROFILING
PRACTICAL EXAMPLE: PROFILING THE APPLICATIONPreview
PRACTICAL EXAMPLE: BASIC INSULATIONPreview
PRACTICAL EXAMPLE: SUPPLEMENTARY INSULATION
PRACTICAL EXAMPLE: REINFORCED INSULATION
OTHER STANDARDS AND SECTION WRAP UP
Clearance Calculation Exercise
|Section 9: CREEPAGE DISTANCE|
SECTION INTRODUCTION AND CREEPAGE DEFINITIONPreview
PARAMETERS INFLUENCING CREEPAGE
COMPARATIVE TRACKING INDEX (CTI)Preview
Material group category from CTI
CREEPAGE FOR BASIC, SUPPLEMENTARY AND REINFORCED INSULATION
OTHER NOTES AND SECTION WRAP UP
|Section 10: CREEPAGE DISTANCE CALCULATION PROCEDURE|
SECTION INTRODUCTION AND PRACTICAL EXAMPLE: PRODUCT PROFILE
PRACTICAL EXAMPLE: MATERIAL GROUP CATEGORY FROM CTI
PRACTICAL EXAMPLE: CREEPAGE FOR REINFORCED INSULATION
EFFECTS OF BRIDGING COMPONENTS AND SECTION WRAP UP
Creepage Calculation Exercise
|Section 11: * New * PCB CAD/CAM SOFTWARE - CLEARANCE AND CREEPAGE|
NET CLASSES AND CLEARANCE SETTINGSPreview
DESIGN RULE CHECKER (DRC) AND CLEARANCE SETTINGS
ADDING A NEW NET CLASS & VERIFYING THE DRC
CONCLUSIONS AND SECTION WRAP UP
Clearance and creepage in Eagle CAD
|Section 12: SOLID INSULATION|
SECTION INTRODUCTION AND SOLID INSULATION
MATERIAL PROPERTIES AND OFF-THE-SHELF ENCLOSURES
CUSTOM ENCLOSURES/BARRIERS AND SECTION WRAP UP
Supplementary insulation by solid barriers
Reinforced insulation by solid barriers
|Section 13: INSULATION DIAGRAMS|
SECTION INTRODUCTION AND INSULATION DIAGRAMSPreview
ACRONYMS AND CLASS I EXAMPLE
EXAMPLES: CLASS II & SOLID INSULATIONPreview
EXAMPLE: CLASS II & REINFORCED INSULATION
EXAMPLE: CLASS II WITH SECONDARY CIRCUIT
MEDICAL DEVICES INSULATION DIAGRAMS AND SECTION WRAP UP
|Section 14: SAFETY CRITICAL COMPONENTS|
SECTION INTRODUCTION, CRITICAL & BRIDGING COMPONENTSPreview
US APPROVED COMPONENTSPreview
EU APPROVED COMPONENTS
Marco Catanossi lives and works in Italy. He has a MSc in electronics engineering and he is an expert in product safety and certifications, helping many companies from different countries to successfully put their product on the market. The Author has also experience as assessors on product safety on behalf of the Court of Justice and he is member of the European Union engineering panel for innovation projects evaluation. Since 2008, Marco has built a consulting business helping manufacturers from different fields (from medical devices to toys and garments) to meet regulatory and technical requirements worldwide. He is a dedicated professional with a high specialization in products safety (including electrical/electronics), a deep insight in product liability and a strong practical approach to product engineering and design.