Voltage
Time
HystAbs1
PICKUP
TRIP
PICKUP
Pickup1
PICKUP
TRIP
t
tIReset1
Time
Time
Integrator
t
Frozen Timer
Linearly decreased
Instantaneous
Measured
Voltage
ANSI05000020‐3‐en.vsdx
ANSI05000020 V3 EN-US
Figure 334: Voltage profile causing a reset of the PICKUP signal for step 1, and inverse time delay at different
reset types
Definite time delay
When definite time delay is selected, the function will trip as shown in figure
335. Detailed
information about individual stage reset/operation behavior is shown in figure
336 and figure 337
respectively. Note that by setting
tResetn
=
0.0s
(where
n
means either 1 or 2 respectively),
instantaneous reset of the definite time delayed stage is ensured.
1MRK 502 066-UUS B Section 9
Voltage protection
621
Technical manual
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