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Time
Integrator
Voltage
Time
START
TRIP
START
U1>
START
TRIP
t
tIReset1
Time
t
Frozen Timer
Linearly
decreased
Instantaneous
Measured
Voltage
tIReset1
IEC05000020-3-en.vsd
HystAbs1
IEC05000020 V3 EN-US
Figure 145:
Voltage profile causing a reset of the START signal for step 1, and inverse time delay
Definite time delay
When definite time delay is selected, the function will operate as shown in figure
. Detailed information about individual stage reset/operation behavior is shown
in figure
respectively. Note that by setting
tResetn
=
0.0s
,
instantaneous reset of the definite time delayed stage is ensured.
1MRK 506 382-UEN A
Section 8
Voltage protection
Line distance protection REL650 2.2 IEC
293
Technical manual
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