Technical Data
4.2 Definite-Time Overcurrent Protection 50(N)
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
480
Tolerances
Influencing Variables for Pickup and Dropout
Pickup currents
2 % of setting value or 10 mA at
I
Nom
= 1 A
or 50 mA at
I
Nom
= 5 A
Delay times T
1 % or 10 ms
Power supply direct voltage in range 0.8
≤
V
PS
/V
PSNom
≤
1.15
1 %
Temperature in range 23.00 °F (-5 °C)
≤
Θ
amb
≤
131.00 °F (55 °C)
0.5 %/10 K
Frequency in range 0.95
≤
f/f
Nom
≤
1.05
1 %
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
1 %
1 %
Transient overreaction during fundamental harmonic measuring procedure for
τ
> 100 ms
(with full displacement)
<5 %
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