ABB RED650 - Page 255

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-US
Figure 113: Voltage profile not causing a reset of the START signal for step 1, and inverse time delay at
different reset types
1MRK 505 394-UEN A Section 9
Voltage protection
Line differential protection RED650 2.2 IEC 249
Technical manual