ABB RES670 Technical Manual page 300

Section 9
Voltage protection
ANSI05000019 V3 EN-US
Figure 98: Voltage profile not causing a reset of the PICKUP signal for step 1, and inverse time delay at
different reset types
294
Voltage
PICKUP
PU_Overvolt1
PICKUP
TRIP
Time
Integrator
t
Instantaneous
tIReset1
TRIP
HystAbs1
t
Frozen Timer
Phasor measurement unit RES670 2.2 ANSI
1MRK 511 408-UUS A
tIReset1
Measured
Voltage
Time
Linearly
decreased
Time
ANSI05000019-3-en.vsd
Technical manual