Siemens SIPROTEC

Technical Data
4.14 Instantaneous High-Current Switch-onto-Fault Protection (SOTF)
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
612
4.14 Instantaneous High-Current Switch-onto-Fault Protection (SOTF)
Pickup
Times
High current pickup I>>> for I
N
= 1 A 0.10 A to 15.00 A
or ∞ (disabled)
Increments 0.01 A
for I
N
= 5 A 0.50 A to 75.00 A
or ∞ (disabled)
High current pickup I>>>> for I
N
= 1 A 1.00 A to 25.00 A
or ∞ (disabled)
Increments 0.01 A
for I
N
= 5 A 5.00 A to 125.00 A
or ∞ (disabled)
Dropout to pickup ratio Approx. 90 %
Pickup tolerance 3 % of setting value or 1 % of I
N
Shortest trip time
(fast relays/high-speed relays)
Approx. 10 ms / 5 ms