Siemens SIPROTEC 7UM62 - Page 489

Technical Data
4.15 Undervoltage Protection (ANSI 27)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
489
Influencing Variables
Figure 4-12 Tripping Times of the Inverse Undervoltage Protection for Setting Value Up <= 75 V,
without Additional Tripping Delay (T
Up<
= 0)
Power supply direct voltage in range 0.8 ≤ U
Aux
/U
AuxN
≤ 1.15 ≤ 1 %
Temperature in range 23.00 °F (–5 °C) ≤ Θ
amb
≤ 131.00 °F (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 %