Negative Sequence Protection - Siemens SIPROTEC 7SK80 Manual
Motor protection
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Also See for SIPROTEC 7SK80:
- Manual (512 pages) ,
- Product information (80 pages) ,
- Manual (62 pages)
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4.8
Negative Sequence Protection 46-1, 46-2
Setting Ranges / Increments
Unbalanced load tripping element
46-1,46-2
Delay Times 46-1, 46-2
Dropout Delay Times 46 T DROP-OUT
Functional Limit
Functional Limit
Times
Pickup Times
Dropout Times
Dropout Ratio
Characteristic 46-1, 46-2
Tolerances
Pickup values 46-1, 46-2
Time Delays
Influencing Variables for Pickup Values
Auxiliary DC voltage in range 0.8 ≤ V
Temperature in range –5 °C (41 °F) ≤ Θ
Frequency in range of 50 Hz to 70 Hz
Frequency in range 0.95 ≤ f/f
Frequency outside 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)
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
for I
= 1 A 0.10 A to 3.00 A or ∞ (disabled)
Nom
for I
= 5 A 0.50 A to 15.00 A or ∞ (disabled)
Nom
0.00 s to 60.00 s or ∞ (disabled)
0.00 s to 60.00 s
for I
= 1 A all phase currents ≤ 10 A
Nom
for I
= 5 A all phase currents ≤ 50 A
Nom
Approx. 35 ms
Approx. 35 ms
Approx. 0.95 for I
/I
2
Nom
3 % of setting value or 15 mA for I
1 % or 10 ms
/V
≤ 1.15
Aux
AuxNom
≤ 55 °C (131 °F)
amb
≤ 1.05
Nom
≤ 1.05
Nom
4.8 Negative Sequence Protection 46-1, 46-2
≥ 0.3
= 1 A, or 75 mA for I
Nom
Technical Data
Increments 0.01 A
Increments 0.01 s
Increments 0.01 s
= 5 A
Nom
1 %
0.5 %/10 K
1 %
Increased tolerances
1 %
1 %
<5 %
363
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