Underexcitation (Loss-Of-Field) Protection (Ansi 40) - Siemens Siprotec 7UM611 Manual

4.6

Underexcitation (Loss-of-Field) Protection (ANSI 40)

Setting Ranges / Increments
Times
Dropout Ratios
Tolerances
Influencing Variables for Pickup Values
7UM61 Manual
C53000-G1176-C127-3
Conductance Sections 1/xd Char.
Slope angle α1, α2, α3
Delay times T
Undervoltage Blocking
Pickup Times
Conductance Sections 1/xd Char.
Rotor circuit criterion Uexc
Undervoltage Blocking
Conductance Sections 1/xd Char., α
Rotor circuit criterion Uexc
Undervoltage Blocking
Stator criterion 1/xd Char.
Stator Criterion α
Undervoltage Blocking
Delay times T
Auxiliary DC voltage in range
0.8 ≤ U ≤ 1.15
/U
Aux AuxN
Temperature in Range
23°F or –5 °C ≤ Θ ≤ 131°F or 55 °C
amb
Frequency in Range 0.95 ≤ f/f
Harmonics
- Up to 10 % 3rd harmonic
- Up to 10 % 5th harmonic
4.6 Underexcitation (Loss-of-Field) Protection (ANSI 40)
0.25 to 3.00
50° to 120°
0.00 to 60.00
or ∞ (ineffective)
10.0 V to 125.0 V
approx. 60 ms
approx. 60 ms
approx. 50 ms
approx. 0.95
approx. 1.05 or pickup value + 0.5 V
approx. 1.1
3 % of setting value
1° electrical
1 % of setting value or 0.5 V
1 % or 10 ms
≤ 1 %
≤ 0.5 % / 10 K
≤ 1.05 ≤ 1 %
N
≤ 1 %
≤ 1 %
Increments 0.01
Increments 1°
Increments 0.01
s
Increments 0.1V
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