Technical Data
10-12
7SJ63 Manual
C53000-G1140-C120-1
10.2
Definite-Time Overcurrent Protection (50 and 50N Elements)
Pickup and Time
Delay Ranges/
Resolutions
Pickup Current
50–1 (phases) 0.50 A to 175.00 A
1
)(increments 0.05 A)
1
)
or
∞
(ineffective, no pickup)
Pickup Current
50N–1 (ground)0.25 A to 175.00 A
1
)(increments 0.05 A)
1
)
or
∞
(ineffective, no pickup)
Pickup Current
50–2 (phases) 0.50 A to 175.00 A
1
)(increments 0.05 A)
1
)
or
∞
(ineffective, no pickup)
Pickup Current
50N–2 (ground)0.25 A to 175.00 A
1
)(increments 0.05 A)
1
)
or
∞
(ineffective, no pickup)
Delay Times T
50–1, 50–2,
0.00 s to 60.00 s (increments 0.01 s)
50N–1, 50N–2 or
∞
(does not expire)
The set times are pure delay times.
Inherent Operating
Times
Pickup times without delay (T) or inrush stabilization. With inrush stabilization add
10 ms
50–1, 50–2, 50N–1, 50N–2
– Current = 2 x Pickup Value
approx. 30 ms
– Current = 10x Pickup Value
approx. 20 ms
Dropout Times
50–1, 50–2, 50N–1, 50N–2
approx. 40 ms
Dropout
Dropout/Pickup (ratio)
approx. 0.95 for I/I
N
≥
0.3
Tolerances
Pickup Current 50–1, 50–2,
50N–1, 50N–2
2 % of setting value or 50 mA
1
)
Delay Times T
1 % of setting value or 10 ms
Influencing Vari-
ables for Pickup
Power supply direct voltage in range
0.8
≤
V
PS
/ V
PS nominal
≤
1.15
1 %
Temperatur in range
23º F
≤
ϑ
amb
≤
131º F
0.06% /10º F
Frequency in range
0.95
≤
f/f
N
≤
1.05
1 %
Harmonic currents
– Up to 10 % 3. Harmonic
1 %
– Up to 10 % 5. Harmonic
1 %
1
) For I
N
= 1 A, divide all limits and increments by 5.
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