Siemens siprotec 7SD5

4.16 Synchronism and Voltage Check (optional)
559
7SD5 Manual
C53000-G1176-C169-1
4.16 Synchronism and Voltage Check (optional)
Operating Modes
Voltages
∆U-measurement
Synchronous Power Conditions
Asynchronous Power Conditions
Times
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
U> for live status 20 V to 125 V (phase-to-phase) 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 1.0 V to 40.0 V (phase-to-phase) Increments 0.1V
Tolerance 1 V
Dropout to pickup 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
∆f-measurement 0.03 Hz to 2.00 Hz Increments 0.01 Hz
Tolerance 15 mHz
Max. angle error 5° for ∆f ≤ 1Hz
10° for ∆f > 1 Hz
Synchronous/asynchronous limits 0.01 Hz
Circuit breaker operating time 0.01 s to 0.60 s Increments 0.01 s
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