ABB RES670 Technical Manual page 286

Section 9
Voltage protection
Voltage
PICKUP
PICKUP 1
PICKUP
TRIP
Time
Integrator
t
Instantaneous
ANSI05000011 V2 EN-US
Figure 90: Voltage profile causing a reset of the pickup signal for step 1, and inverse time delay at different
reset types
280
tIReset1
PICKUP
Frozen Timer
Linearly
decreased
Definite timer delay
HystAbs1
TRIP
t
Phasor measurement unit RES670 2.2 ANSI
1MRK 511 408-UUS A
tIReset1
Measured Voltage
Time
Time
ANSI05000011-2-en.vsd
Technical manual