ABB RES670 Technical Manual page 301

1MRK 511 408-UUS A
Voltage
Pickup1
PICKUP
TRIP
Time
Integrator
t
Instantaneous
ANSI05000020 V2 EN-US
Figure 99: Voltage profile causing a reset of the PICKUP signal for step 1, and inverse time delay at different
reset types
Phasor measurement unit RES670 2.2 ANSI
Technical manual
tIReset1
PICKUP
PICKUP
Frozen Timer
Linearly decreased
Definite time delay
When definite time delay is selected, the function will trip as shown in figure 100.
Detailed information about individual stage reset/operation behavior is shown in figure
101 and figure 102 respectively. Note that by setting tResetn = 0.0s (where n means
TRIP
HystAbs1
t
ANSI05000020-2-en.vsd
Section 9
Voltage protection
tIReset1
Measured Voltage
Time
Time
295