ABB RES670 Technical Manual page 285

1MRK 511 408-UUS A
ANSI05000010 V3 EN-US
Figure 89: Voltage profile not 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
Voltage
PICKUP
HystAbs1
PICKUP1
PICKUP
TRIP
Time
Integrator
t
Instantaneous
tIReset1
TRIP
t
Frozen Timer
Linearly
decreased
Section 9
Voltage protection
tIReset1
Measured
Voltage
Time
Time
ANSI05000010-3-en.vsd
279