Kalkulator
Standard: IEC 60255
A
A
Range: 0.05 - 1.5
Waktu Trip
4.280 s
Kelipatan Arus
5.00×
I/Is
Zona Trip
Thermal / Long-time
Curve Visualization
Kurva
Titik Terhitung
Formula Reference
IEC 60255 Standard Formula
t=TMS×
k
(I/Is)α−1
Where: t = trip time (s), TMS = Time Multiplier Setting, I = fault current, Is = pickup current
IEEE C37.112 Standard Formula
t=TD×
[]
+BA
(I/Is)p−1
Where: t = trip time (s), TD = Time Dial, I = fault current, Is = pickup current
IEC 60255 Equation Constants
| Tipe Kurva | k | α |
|---|---|---|
| IEC standard inverse curve | 0.140 | 0.020 |
| IEC very inverse curve | 13.5 | 1 |
| IEC extremely inverse curve | 80 | 2 |
| IEC long time standard inverse curve | 120 | 1 |
IEEE C37.112 Equation Constants
| Tipe Kurva | A | B | p |
|---|---|---|---|
| IEEE moderately inverse curve | 0.0515 | 0.114 | 0.02 |
| IEEE very inverse curve | 19.61 | 0.491 | 2 |
| IEEE extremely inverse curve | 28.2 | 0.1217 | 2.0 |
Tentang Relay IDMT
Relay IDMT beroperasi dengan penundaan waktu.