Technical Data
4.2 Definite-Time Overcurrent Protection 50(N)
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008
319
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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