ABB REG670 - Page 491

Voltage
Time
HystAbs1
START
TRIP
U1<
START
TRIP
t
tIReset1
Time
Time
Integrator
t
Frozen Timer
Linearly
decreased
Instantaneous
Measured
Voltage
tIReset1
IEC05000010-4-en.vsd
IEC05000010 V4 EN
Figure 227: Voltage profile not causing a reset of the START signal for step 1, and inverse time delay at
different reset types
1MRK502052-UEN B Section 9
Voltage protection
485
Technical manual