Siemens siprotec SJ62 User Manual page 485

4 Technical Data
Dropout Time Curves with Disk Emulation acc. to ANSI
Dropout Value
Tolerances
Influencing Variables for Pickup Values
483
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 for the range (I
IEC and ANSI (without Disk Emulation)
ANSI with Disk Emulation
Pickup threshold I
2p
≤ 0.90
Time for I /I
2 2p
Power Supply DC Voltage in Range
0.8 ≤ V ≤ 1.15
/V
PS PSNom
Temperature in range
23 °F (–5 °C) ≤ Θ ≤ 131 °F (55 °C)
amb
Frequency in range 0.95 ≤ f/f
Harmonics
- Up to 10 % 3rd harmonic
- Up to 10 % 5th harmonic
Transient overreach for τ > 100 ms (with com-
plete asymmetry)
) ≤ 0.90
/I
2 2p
Approx. 1.05 · I
0.95 · pickup threshold I
Approx. 0.90 · I
2 % of set value or 10 mA for I
or 50 mA for I
5 % of reference (calculated) value + 2 %
current tolerance, respectively 30 ms
1 %
0.5 %/10 K
≤ 1.05
1 %
Nom
1 %
1 %
<5 %
setting value, which is approx.
2p
2
setting value
2p
= 1 A
Nom
= 5 A
Nom
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015