Definite-Time Overcurrent Protection 50(N) - Siemens SIPROTEC 7SJ61 Manual

Technical Data

4.2 Definite-Time Overcurrent Protection 50(N)

4.2 Definite-Time Overcurrent Protection 50(N)
Operating Modes
Three-phase
Two-phase
Measuring Technique
All elements
50-3, 50N-3
Setting Ranges / Increments
Pickup current phases
Pickup currents ground
Delay times T
Dropout delay times 50 T DROP-OUT, 50N T
DROP-OUT
Times
Pickup times (without inrush restraint, with restraint add 10 ms)
First harmonic, rms value
- for 2 x setting value
- for 10 x setting value
Instantaneous value
- for 2 x setting value
- for 10 x setting value
Dropout Times
First harmonic, rms value
Instantaneous value
Dropout Ratio
Dropout ratio for
- first harmonic, rms value
- instantaneous value
318
Standard
Phases A and C
First harmonic, rms value (true rms)
Instantaneous values
= 1 A 0.10 A to 35.00 A or ∞ (disabled)
for I
Nom
= 5 A 0.50 A to 175.00 A or ∞ (disabled)
for I
Nom
= 1 A 0.05 A to 35.00 A or ∞ (disabled)
for I
Nom
= 5 A 0.25 A to 175.00 A or ∞ (disabled)
for I
Nom
0.00 s to 60.00 s or ∞ (disabled)
0.00 s to 60.00 s
approx. 30 ms
Approx. 20 ms
approx. 16 ms
approx. 16 ms
approx. 30 ms
approx. 40 ms
approx. 0,95 for I/I
approx. 0,90 for I/I
Increments 0.01 A
Increments 0.01 A
Increments 0.01 s
Increments 0.01 s
≥ 0.3
Nom
≥ 0.3
Nom
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008