Siemens Siprotec 7UM612 - Page 309

4.3 Inverse-Time Overcurrent Protection (ANSI 51V)
309
7UM61 Manual
C53000-G1176-C127-3
Influencing Variables for Pickup Values
Auxiliary DC voltage in range
0.8 ≤ U
Aux
/U
AuxN
≤ 1.15
≤ 1%
Temperature in Range
23°F or –5 °C ≤ Θ
amb
≤ 131°F or 55 °C
≤ 0.5 % / 10 K
Frequency in range 0.95 ≤ f/f
N
≤ 1.05 ≤ 1%
Harmonics
– Up to 10 % 3rd harmonic
– Up to 10 % 5th harmonic
≤ 1%
≤ 1%
www . ElectricalPartManuals . com