LS Industrial Systems GIPAM - Page 22

21
GIPAM User Manual
6-2-3. The formula of Time Characteristic Curve
1) Time Characteristic
t = T x TL (sec)
ⓐ "T" is an operating characteristic and it should be one of the following formulas.(Time
Delay Characteristic, IEC 255-3 is applied)
Standard Inverse (SI) T = Definite Time (D2) T = 2
Definite Time (D4) T = 4
Definite Time (D8) T = 8
Very Inverse (VI) T =
(Vid.: I = Operated Current
Is = Set Current)
Extreme Inverse (EI) T =
Long Inverse (LI) T =
ⓑ TD is the value that determines operating time and ranges from 0.05 to 1.00
0.14
( I / Is )
0.02
- 1
13.5
( I / Is ) - 1
80
( I / Is )
2
- 1
120
( I / Is )
- 1