1MDU07205-YN rev. F
REF601 CEI
User’s manual
33
4.7.3 Very inverse-time characteristics curve
Fig. 7 – Very inverse-time characteristics of relay REF601
Protection Functions
The graphs between I / Isat and related timing for various IDMT curves is attached
below. It is common for both earth and phase currents. Phase current measurement
is up to 20In while earth measurement is limited up to 12.5In. So corresponding I /
Isat get limited depending upon maximum measurement limits. Minimum trip time
for IDMT curve is 50ms.
To Next Page
Loading...
