IEC09000164-2
Operate time
Current
tx
tnMin
IMinn
IEC09000164 V2 EN
Figure 43:
Minimum operate current and operate time for inverse time
characteristics
In order to fully comply with curves definition the setting parameter
txMin
shall be set to
the value which is equal to the operate time of the selected IEC inverse curve for measured
current of twenty times the set current pickup value. Note that the operate time value is
dependent on the selected setting value for time multiplier
TDn
.
6.4.3.2
Common settings for all steps
tx
: Definite time delay for step
x
. Used if definite time characteristic is chosen.
AngleRCA
: Relay characteristic angle given in degree. This angle is defined as shown in
figure
. The angle is defined positive when the residual current lags the reference
voltage (Vpol = 3V
0
or V
2
)
Section 6
1MRK 511 286-UUS A
Current protection
110
Application manual
Содержание REC650 ANSI
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