ABB REL650 Technical Manual page 299

1MRK 506 382-UEN A
Voltage
U1>
START
TRIP
Time
Integrator
t
Instantaneous
IEC05000020 V3 EN-US
Figure 145: Voltage profile causing a reset of the START signal for step 1, and inverse time delay
Line distance protection REL650 2.2 IEC
Technical manual
tIReset1
START
START
Frozen Timer
Linearly
decreased
Definite time delay
When definite time delay is selected, the function will operate as shown in figure
146. Detailed information about individual stage reset/operation behavior is shown
in figure 147 and figure
instantaneous reset of the definite time delayed stage is ensured.
TRIP
HystAbs1
t
148 respectively. Note that by setting tResetn = 0.0s,
Section 8
Voltage protection
tIReset1
Measured
Voltage
Time
Time
IEC05000020-3-en.vsd
293