Siemens SIPROTEC 7UM62 - Page 472

Technical Data
4.4 Thermal Overload Protection (ANSI 49)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
472
Influencing Variables referring to k · I
N
Figure 4-4 Tripping Characteristics for Overload Protection
Power supply direct voltage in range 0.8 ≤ U
Aux
/U
AusN
≤ 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 %