How to draw TCC curve of Relay ? 2

[Fazlay]

for co-ordination study i have to draw the TCC curve of a relay , I have the specification of the relay i have attached the specification .

Can any one give me any idea (or resource to study ) how can i draw the time vs current curve for this relay ?

 

[dpc]

You need the curves or equations from the manufacturer. Or access to a commercial software program that already has the digitized curves. There's no way to develop the curve with the data you have.

 

[ScottyUK]

Well.... that's not strictly true because both the IEC and IEEE curves are defined by equations, so you can plot them yourself if you feel like a bit of work in Excel...

The equation you're need for your specific example is the IEC Standard Inverse curve.

 

[HamburgerHelper]

Just FYI, they are graphed with logged scales. They are going to look goofy if you using linear scaling.


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If you can't explain it to a six year old, you don't understand it yourself.

 

[HamburgerHelper]

Here are some helpful links.

http://pp.kpnet.fi/ijl/

http://www.google.com/url?sa=t&rct=...l7LPdAhWIrVMKHbcDByYQFjABegQICRAC&url=http://

http://www.delab.com.my/download/IDMT%20Time%20Plot.xls&usg=AOvVaw3uwAs3YaO-LmRU7aIH19jC

https://www.google.com/url?sa=t&rct...7bPdAhXJylMKHU_7BWsQFjAAegQIABAC&url=https://

http://www.l-3.com/wp-content/uploads/2014/02/TOC-Operate-Time.xls&usg=AOvVaw0nT40oeybv3OyvvWqXanLR

https://www2.sandc.com/support/coordinaide/init.aspx

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If you can't explain it to a six year old, you don't understand it yourself.

 

[Fazlay]

don't think me that much fool