ABB Relion 670 series - Page 501

Voltage
Time
HystAbs1
PICKUP
TRIP
PICKUP1
PICKUP
TRIP
t
tIReset1
Time
Time
Integrator
t
Frozen Timer
Linearly
decreased
Instantaneous
Measured
Voltage
tIReset1
ANSI05000010-3-en.vsd
ANSI05000010 V3 EN
Figure 249: Voltage profile not causing a reset of the pickup signal for step 1, and inverse time delay at different
reset types
1MRK505222-UUS C Section 8
Voltage protection
495
Technical reference manual