Negative Sequence Protection (Inverse-Time Characteristics) - Siemens 7SK80 Manual

4.9

Negative Sequence Protection (inverse-time characteristics)

Setting Ranges / Increments
Pickup value 46-TOC (I
Time Multiplier T
Time Multiplier D
Functional Limit
Functional Limit
Trip Time Curves acc. to IEC
See also Figure 4-7
The trip times for I
Pickup Threshold
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
) for I
2p Nom
for I
Nom
(IEC)
I2p
(ANSI)
I2p
for I
Nom
for I
Nom
≥ 20 are identical to those for I
/I
2 2p
4.9 Negative Sequence Protection (inverse-time characteristics)
= 1 A 0.05 A to 2.00 A
= 5 A 0.25 A to 10.00 A
0.05 s to 3.20 s or ∞ (disabled)
0.50 s to 15.00 s or ∞ (disabled)
= 1 A all phase currents ≤ 10 A
= 5 A all phase currents ≤ 50 A
/I = 20.
2 2p
Approx. 1.10· I
Increments 0.01 A
Increments 0.01 s
Increments 0.01 s
2p
Technical Data
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