Figure 501: Operating curve of “OvExt IDMT Crv4” based on the specified
settings. The two dots marked on the curve are referred to in the text.
If the excitation level stays at 1.25, the operation occurs after 15.20 s. At the
excitation level of 1.42, the time to operation would be 5.90 s as per the two
dots in
Figure 501
. In this case, the setting
Maximum operate time
3600 s
does not limit the maximum operate time because the operate time at
Start
value
= 110% (1.1 pu) is approximately 75 s.
4.5.7.8 Signals
OEPVPH Input signals
Table 844: OEPVPH Input signals
Name Type Default Description
I3P SIGNAL - Three-phase currents
U3P SIGNAL - Three-phase voltages
BLOCK BOOLEAN 0=False Block signal
1MRS759142 F Protection functions
REX640
Technical Manual
897
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