ABB REG670 - Page 517

TRIP
U1>
TRIP
t
Time
Time
Integrator
t
Frozen Timer
Instantaneous
Voltage
Voltage
Time
HystAbs1
START
START
tIReset1
Measured
tIReset1
Linearly decreased
IEC09000055-2-en.vsd
IEC09000055 V2 EN
Figure 243: Voltage profile not causing a reset of the START signal for step 1, and inverse time delay
1MRK502052-UEN B Section 9
Voltage protection
511
Technical manual