Siemens SIPROTEC

Technical Data
4.6 Distance Protection (optional)
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
593
Pickup (optional)
Overcurrent Pickup
Overcurrent Iph>> for I
N
= 1 A 0.25 A to 10.00 A Increments 0.01 A
for I
N
= 5 A 1.25 A to 50.00 A
Dropout to pickup ratio Approx. 0.95
Measuring tolerances for sinusoidal measured values ± 5%
Voltage and angle-dependent current pickup (
U/I/ϕ) (selectable)
Characteristic Different stages with settable inclinations
Minimum current Iph> for I
N
= 1 A 0.10 A to 4.00 A Increments 0.01 A
for I
N
= 5 A 0.50 A to 20.00 A
Current in fault angle range Iϕ for I
N
= 1 A 0.10 A to 8.00 A Increments 0.01 A
for I
N
= 5 A 0.50 A to 40.00 A
Undervoltage phase-earth Uphe
(segregated for Iph>, Iϕ> and Iph>>)
20 V to 70 V Increments 1 V
Undervoltage phase-phase Uphph
(segregated for Iph>, Iϕ> and Iph>>)
40 V to 130 V Increments 1 V
Lower threshold angle ϕ> 30° to 60° In increments of 1°
Upper threshold angle ϕ< 90° to 120° In increments of 1°
Dropout to pickup ratio
Iph>, If> Approx. 0.95
Uphe, Uphph Approx. 1.05
Measuring tolerances for sinusoidal measured values
Values of U, I ± 5%
Angle ϕ± 3°
Impedance starting (selectable)
Minimum current Iph> for I
N
= 1 A 0.05 A to 4.00 A Increments 0.01 A
for I
N
= 5 A 0.25 A to 20.00 A
The thresholds of the zone set to the highest level are relevant taking into consideration the corresponding direction
Dropout/pickup ratio Approx. 1.05