Voltage
Time
HystAbs1
START
TRIP
START
U1<
START
TRIP
t
tIReset1
Time
Time
Integrator
t
Frozen Timer
Linearly decreased
Instantaneous
Measured Voltage
tIReset1
IEC05000011-en-3.vsd
IEC05000011 V3 EN-US
Figure 105: Voltage profile causing a reset of the START signal for step 1, and inverse time delay at
different reset types
Definite timer delay
When definite time delay is selected the function will operate as shown in figure
106. Detailed information about individual stage reset/operation behavior is shown
in figure 107 and figure 108 respectively. Note that by setting tResetn = 0.0s,
instantaneous reset of the definite time delayed stage is ensured.
Section 9 1MRK 505 394-UEN A
Voltage protection
236 Line differential protection RED650 2.2 IEC
Technical manual
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