Voltage Protection For Vx - Siemens SIPROTEC 7SC80 Series Manual

4.6

Voltage Protection for Vx

Setting Ranges/Increments
Undervoltages 27-1, 27-2
Measured quantity used
Connection: single-phase
Dropout ratio r for 27-1, 27-2
Dropout threshold for (r · 27-1) or (r · 27-2)
Time delays 27-1 Delay, 27-2 Delay
Overvoltages 59-1, 59-2
Measured quantity used
with single-phase connection
Connection: single-phase
Dropout ratio r for 59-1, 59-2
Dropout threshold for (r · 59-1) or (r · 59-2)
Time delay 59-1 Delay, 59-2 Delay
Phase-specific Ph x 59-1 Delay, Ph x 59-2 Delay
1)
r = V /V
dropout pickup
Times
Pickup times
- Undervoltage 27-1, 27-2
- Overvoltage 59-1, 59-2
Dropout times
- Undervoltage 27-1, 27-2
- Overvoltage 59-1, 59-2
Tolerances
Voltage limit values
Delay times T
Influencing Variables
Auxiliary direct voltage in the range of 0.8 ≤ V
Temperature in the range of 23.00 °F (-5 °C) ≤ Θ
131.00 °F (55 °C)
Frequency in the range from 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
60 Hz)
Frequency outside the range of 0.95 ≤ f/f
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
SIPROTEC, 7SC80, Manual
E50417-G1140-C486-A1, Release date 12.2011
Connected single-phase phase-to-ground voltage
10 V to 200 V
1)
1.01 to 3.00
max. 225 V
Minimum hysteresis 0.6 V
0.00 s to 100.00 s or
∞ (disabled)
Connected single-phase phase-to-ground voltage
20 V to 240 V
1)
0.90 to 0.99
max. 260 V for phase-to-ground voltage
Minimum hysteresis 0.6 V
0.00 s to 100.00 s or
∞ (disabled)
≤ 1.15 1 %
/V
PS PSNom
≤
amb
≤ 1.05 (f
= 50 Hz or
Nom Nom
≤ 1.05
Nom
4.6 Voltage Protection for Vx
Increments 1 V
Increments 0.01
Increments 0.01 s
Increments 1 V
Increments 0.01
Increments 0.01 s
approx. 50 ms
approx. 50 ms
approx. 50 ms
approx. 50 ms
3 % of setting value or 1 V
1 % of setting value or 10 ms
0.5 %/10 K
1 %
Increased tolerances
1 %
1 %
Technical Data
249