Edit Configuration - Mains
66
Creating an Excel spreadsheet of the IDMT curve.
The formula used: T = t / ( ( I
A
/ I
T
) – 1 )
2
Can be simplified for addition into a spreadsheet. This can be useful for ‘trying out’ differering values of t
(Time Multiplier) and viewing the results, without actually testing this on the controller.
The formula for the Tripping Time cells is :
(I
A
/ I
T)
Multiple of the Trip setting
(from 1.01 to 3.0 in steps of 0.1)
t
– Time Multiplier
Factory setting is 36
T – Tripping time (seconds)
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