Siemens siprotec 7SA522 - Synchronism and Voltage Check Data (optional)

4.14 Synchronism and Voltage Check (optional)
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7SA522 Manual
C53000-G1176-C155-3
4.14 Synchronism and Voltage Check (optional)
Operating Modes
Voltages
∆U-Measurement
Synchronous Power Conditions
Operating modes
with automatic reclosure
Synchronism check
Live bus - dead line
Dead bus - live line
Dead bus and dead line
Bypassing
Or combination of the above
Synchronism Closing the circuit breaker under asynchronous power condi-
tions possible (with circuit breaker action time)
Operating modes
for manual closure
As for automatic reclosure,
independently selectable
Maximum operating voltage 20 V to 140 V (phase-to-phase) Increments 1 V
U< for dead status 1 V to 60 V (phase-to-phase) Increments 1 V
V> for live status 20 V to 125 V (phase-to-phase) Increments 1 V
Tolerances 2 % of pickup value or 1 V
Drop-off to pick-up ratio Approx. 0.9 (V>) or 1.1 (V<)
Voltage difference 1.0 V to 40.0 V (phase-to-phase) Increments 0.1V
Tolerance 1 V
Drop-off to pick-up ratio Approx. 1.05
∆ϕ-measurement 2° to 80° Increments 1°
Tolerance 2°
∆f-measurement 0.03 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