Siemens SIPROTEC 7SJ62 Manual page 502

Technical Data
4.10 Negative Sequence Protection 46-TOC
Dropout Time Curves with Disk Emulation acc. to ANSI
Representation of the possible dropout time curves, see figure 4-8 and 4-9 each on the left side of the figure
The dropout time constants apply to (I
Dropout Value
IEC and ANSI (without Disk Emulation) Approx. 1.05 · I
ANSI with Disk Emulation
Tolerances
Pickup threshold I
Time for I /I
2 2p
Influencing Variables for Pickup Values
Power supply direct voltage in range
0.8 ≤ V
/V
PS PSNom
Temperature in range 23.00 °F (-5 °C) ≤ Θ
Frequency in range 0.95 ≤ f/f
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
Transient overreaction for τ > 100 ms (with full displacement)
502
/I
2 2p
thresholdI
Approx. 0.90 · I
2p
≤ 0.90
≤ 1.15
≤ 1.05
Nom
) ≤ 0.90
setting value, which is approx. 0.95 · pickup
2p
2
setting value
2p
2 % of set value or 10 mA for I
or 50 mA for I = 5 A
Nom
5 % of reference (calculated) value + 2 % current tolerance,
respectively 30 ms
≤ 131.00 °F (55 °C)
amb
C53000-G1140-C207-2, Release date 01.2008
= 1 A
Nom
1 %
0.5 %/10 K
1 %
1 %
1 %
<5 %
SIPROTEC, 7SJ62/64, Manual