Product Details
Product Description
Product Description
KUC711AE101 3BHB004661R0101 ABB Excitation controller module (CPU module)
KUC711AE101 3BHB004661R0101 ABB Excitation controller module (CPU module)
Our Email: 2235954483@qq.com
contact number:13313705507
contacts：HE
Undervoltage protection based on conventional voltage
measurement
Both the low-set and the high-set undervoltage stage can independently be set to
start and trip when one of the three voltages or all the voltages fall below the set start
value. By default, the low-set undervoltage stage operates when one of the three
voltages fall below the set start value and the high-set undervoltage stage operates
when all the voltages fall below the set start value. The selection is made in SGF4/7
and SGF4/8.
When the phase-to-phase voltage values fall below the set start value of the low-set
stage, U<, the stage generates a start signal after a ~ 80 ms’ start time. When the set
operate time at definite-time characteristic or the calculated operate time at IDMT
characteristic elapses, the stage generates a trip signal.
Stage U
characteristics), tr<, for reset coordination with existing electromechanical relays or
for reducing fault clearance times of recurring, transient faults. If stage Ustarted and the phase-to-phase voltages exceed the set start value of the stage, the
start of the stage remains active for the set resetting time. If the phase-to-phase
voltages fall below the set start value again while the timer is running, the timer is
cleared and the start of the stage remains active.
Consequently, the set resetting time ensures that when the stage starts because of
voltage drops, it is not immediately reset. If stage Uis reset in 70 ms after the phase-to-phase voltages have fallen below 0.15 × Un.
However, if stage Uexceeded the set start value of the stage, the stage is reset when the set resetting time
has expired.
Stage U
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