4.10 Synchronism and Voltage Check (optional and depending on device version)
279
7ST6 Manual
E50417-G1176-C251-A3
4.10
Synchronism and Voltage Check (optional and depending on
device version)
Operating Modes
Voltages
∆
U Measurement
Synchronous/Asynchronous Power Conditions
Times
Operating modes
with automatic reclosure
Synchro check
Dead line / live bus
Dead bus / live line
Dead bus and dead line
Bypassing
Or combination of the above
Synchronization
Closing the circuit breaker under asynchronous power condi-
tions possible (with circuit breaker operating time)
Operating modes
for manual closure
As for automatic reclosure,
independently selectable
Maximum operating voltage
20 V to 140 V
Increments 1 V
U< for dead status
1 V to 60 V
Increments 1 V
U> for live status
20 V to 125 V
Increments 1 V
Tolerances
2 % of pickup value or 1 V
Dropout to pickup ratio
Approx. 0.9 (U>) or 1.1 (U<)
Voltage difference
1 V to 50 V (phase-to-phase)
Increments 0.1 V
Tolerance
1 V
Dropout to pickup ratio
Approx. 1.05
∆ϕ
measurement
1
°
to 80
°
Increments 1
°
Tolerance
1
°
∆
f measurement
0.01 Hz to 2.00 Hz
Increments 0.01 Hz
Tolerance
15 mHz
Enable delay
0.00 s to 30.00 s
Increments 0.01 s
Minimum measuring time
Approx. 80 ms
Maximum measuring time
0.01 s to 600.00 s;
∞
Increments 0.01 s
Tolerance of all timers
1 % of setting value or 10 ms
www
. ElectricalPartManuals
. com
