Safety is paramount when working with electronic systems so standards organizations mandate safety checks to prevent electrical discharge. Unfortunately, manual inspections are error-prone and they struggle to detect violations as PCB design becomes more complicated. Automating the process can detect hard-to-find errors and save weeks off your PCB design time.
Creepage distance for the avoidance of the failure by tracking Download / View The rating of clearance and creepage distances depends on the expected electrical surge, the characteristic values of the electronic protection measures as well as the contamination at the place of installation.
The Ex e standard defines generous min creepage and clearance distances that must be satisfied, e.g. For 320V a min clearance of 6mm is required and a min creepage of 6.3mm for material group I. Our situation is that we have two conductors that are insulated from each-other by an insulator with a number of joints.
Clearance Calculator This program is based on Table 2H of IEC 60950. Select the Insulation, Pollution Degree, Nominal AC Mains, and enter the Working Voltage (peak or dc), then click on the button to get the corresponding Clearance in mm and mils.
Calculate the creepage distance between the primary and secondary circuits. Assuming pollution degree 2 and material group IIIb, the required creepage distance for basic insulation would be 3.5 mm using linear interpolation. For reinforced insulation, the values for creepage distances are double the values provided in the table for basic.
The creepage requirements depend on the insulation material group, pollution degree and working voltage. For a given circuit and application, these requirements are always greater than or equal to the clearance. Our calculator provides the values from Table 2N of UL60950-1 2nd Edition.
Duration: 27:23
Details
Overview
Safety is paramount when working with electronic systems so standards organizations mandate safety checks to prevent electrical discharge. Unfortunately, manual inspections are error-prone and they struggle to detect violations as PCB design becomes more complicated. Automating the process can detect hard-to-find errors and save weeks off your PCB design time.
What You Will Learn
Why creepage and clearance are important to measure
How electrical safety checks can minimize PCB design iterations
Which IEC standards HyperLynx DRC supports
How HyperLynx DRC checks for creepage and clearance
The benefits of integrating HyperLynx DRC with Xpedition
Rory Riggs
Rory is a Technical Marketing Engineer for the Electronic Board Systems segment at Mentor, A Siemens Business. His focus is on high-speed products and their integration with PCB tools in the Electronic Board Systems portfolio. Rory has been at Mentor for over 5 years, previously holding positions of Associate Rotation Engineer and Corporate Application Engineer. Rory holds both a Bachelor of Science in Electrical Engineering and Masters of Engineering in Electrical Engineering from the University of Idaho.
Who Should View
PCB designers
Layout engineers
CAD teams responsible for signoff and review
Electrical engineers
Minimum Creepage Distance
Related Resources
Multimedia
Other Related Resources
While creepage and clearance sounds like something that’s a misdemeanor in most states, we are asked about it frequently. Why all the questions? Either it’s not a crime in Indiana, or designers are asking about higher voltage connector systems.
Autodesk maya 2014 free download. Creepage and clearance is ultimately about safety and meeting regulatory standards, regardless of the system design. And, the ongoing trends to reduce PCB size and increase density become a design challenge when these smaller, denser PCBs incorporate high voltage circuits.
Creepage and Clearance Defined
Designers are usually trying to reach UL and CE 61800-5-1 specs that call out creepage and clearance distance given material grade, working voltage, and pollution degree. While I may be oversimplifying matters, at the end of the day we’re trying to avoid arcing.
Here’s a quick review of the definitions just to make sure we’re on the same page. Windows 8.1 oem iso torrent.
Creepage is the shortest distance along the surface of a solid insulating material between two conductive parts.
Clearance is the shortest distance in air between two conductive parts.
Clearance And Creepage Distance Calculator Rand Mcnally
A creepage distance can’t be less than the clearance distance; in other words, the shortest creepage distance will be equal to the clearance distance.
Connector manufacturers can increase creepage distances by adding grooves, notches, or plastic planes (i.e., walls) on the connector’s plastic insulator. This increases the physical distance on the surface of the plastic insulator. See the illustration above right for a design that incorporates grooves to increase the creepage distance.
Locating Creepage and Clearance Specs
While creepage and clearance are simple values, we’ve been told it can be extremely difficult to locate them on some connector supplier’s websites. We try to make it easy to find. Samtec has several resources that can help you locate a connector system that will meet their creepage and clearance specs for power products.
First is Solutionator, our parametric search tool that makes it easy to find the best Samtec socket and terminal set based on your design requirements. Solutionator is different because it doesn’t give you one just connector – it gives you the part numbers of both the mated socket and terminal strips that meet your design criteria. This is the only search tool that provides such a complete solution.
One of the search parameters is creepage and clearance. If you want to check it out, open the Solutionator page, and select the “Additional Filters” box under “Search Options” (see the screen capture below).
Creepage And Clearance Standard
When you do this, about 19 additional search boxes appear. Look over to the right and you will see a box to enter either the creepage or clearance distance. I selected 2.00 mm in the example below. The list of mated connector sets that meet that criteria then appears below the additional filters, although you may have to scroll down a bit to see them. Again, see the screen capture below.
Second, creepage and clearance specs are listed on the catalog page for every power product. Viscidus globule. You’ll find them in the left-hand margin.
Clearance And Creepage Distance
Also, we can selectively load contacts to achieve customer-specific creepage and clearance requirements. This is a common application to meet both creepage and clearance distances. For additional support, contact [email protected].
Clearance And Creepage Distance Calculator Estimate
Other Links That May Be Of Interest
Clearance And Creepage Distance Calculator Worksheet