Siemens siprotec 7SA522 - Synchronism and Voltage Check (Dead-Line; Dead-Bus Check)

Technical Data
10-24 7SA522 Manual
C53000-G1176-C119-2
Voltage measurement live or bus 30 V to 90 V (phase-to-earth)
(steps 1 V)
Voltage supervision time for
dead / live line or bus 0.10 s to 30.00 s
(steps 0.01 s)
Time delay for close command
transmission 0.00 s to 300 s; ∞
(steps 0.01 s)
10.12 Synchronism and Voltage Check (Dead-line / Dead-bus Check)
Operating Modes Operating modes
with automatic re-closure Synchronism check,
dead-line / live-bus
dead-bus / live-line,
dead-bus and
dead-line
bypassing or similar combinations of the
above
Synchronism Closing possible under non-synchronous
system conditions
(with consideration of circuit-breaker
operating time)
Control programs for manual closing as for automatic reclosure, independently
selectable
Voltages Minimal operating voltage 1 V
Maximum operating voltage 20 V to 140 V (phase-to-phase)
(steps 1 V)
U> for dead-line / dead-bus check 1 V to 60 V (phase-to-phase)
(steps 1 V)
U< for live-line/ live-bus check 20 V to 125 V (phase-to-phase)
(steps 1 V)
Tolerances 2 % of pick-up value or 2 V
Drop-off to pick-up ratios approx. 0.9 (U>) or 1.1 (U<)
∆U-Measurement Voltage difference 1 V to 40 V (phase-to-phase)
(steps 0.1 V)
Tolerance 1 V
Synchronous
System Conditions
∆ϕ−measurement 2° to 60° (steps 1°)
Tolerance 2°
∆f-measurement 0.03 Hz to 2.00 Hz
(steps 0.01 Hz)
Tolerance 15 mHz
Release delay 0.00 s to 30.00 s
(steps 0.01 s)