Table 200:
Parameters a, b and c for different IDMT curves
Operating curve type
setting
a
b
c
OvExt IDMT Crv1
2.5
115.00
4.886
OvExt IDMT Crv2
2.5
113.50
3.040
OvExt IDMT Crv3
2.5
108.75
2.443
GUID-BD1205DC-1794-4F64-A950-6199C54DB7B1 V1 EN
Figure 120:
Trip time curves for the overexcitation IDMT curve ("OvExt IDMT Crv1")
for parameters a = 2.5, b = 115.0 and c = 4.886
Overexcitation IDMT curve 4
The base equation for the IDMT curve “OvExt IDMT Crv4” is:
1MRS240050-IB C
Section 4
Protection functions
REF615R
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