Operating Ranges Of The Protection Functions - Siemens Siprotec 7UM611 Manual

4.25

Operating Ranges of the Protection Functions

Protection function
Definite-Time Overcurrent Protection
(ANSI 50,51,67)
Inverse-Time Overcurrent Protection
(ANSI 51V)
Thermal Overload Protection (ANSI 49)
Unbalanced Load (Negative Sequence)
Protection (ANSI 46)
Underexcitation (Loss-of-Field) Protection
(ANSI 40)
Reverse Power Protection (ANSI 32R)
Forward Active Power Supervision (ANSI
32F)
Impedance Protection (ANSI 21)
Undervoltage Protection (ANSI 27)
Overvoltage Protection (ANSI 59)
Frequency Protection (ANSI 81)
Underfrequency protection
Overexcitation (Volt/Hertz) Protection
(ANSI 24)
Rate-of-Frequency-Change Protection
df/dt (ANSI 81R)
Jump of Voltage Vector
90-%-Stator Earth Fault Protection (ANSI
59N, 64G, 67G)
Sensitive Earth Fault Protection (ANSI
51GN, 64R)
100-%-Stator Earth Fault Protection with
3rd Harmonics (ANSI 27/59TN 3rd Harm.)
Motor Starting Time Supervision (ANSI
48)
Restart Inhibit for Motors (ANSI 66,
49Rotor)
Breaker Failure Protection (ANSI 50BF)
Inadvertent Energization (ANSI 50, 27)
Threshold supervision
External Trip Functions
RTD-Box
Operational Condition 1:
Operational Condition 0:
7UM61 Manual
C53000-G1176-C127-3
4.25 Operating Ranges of the Protection Functions
Operational condi-
tion 0
f ≤ 0 Hz 11 Hz < f/Hz ≤ 40
active active
inactive active
1)
inactive active
1)
inactive active
inactive active
inactive active
inactive active
inactive active
2)
inactive active
active active
inactive active
inactive active
1)
inactive active
inactive active
inactive active
active active
inactive active
inactive active
inactive active
inactive active
inactive active
active active
inactive active
active active
active active
At at least one of the measuring inputs (I
5% of the rated voltage is present so that the sampling frequency for the measured
value processing can be adjusted.
If no suitable measured values are present, or if the frequency is below 11 Hz or above
70 Hz, the device cannot operate (operational condition 0) and no measured value
processing occurs.
Operational condition 1
40 Hz ≤ f/Hz ≤ 69
active
active
active
active
active
active
active
active
active
active
active
active
active
4)
active
5) 5)
active
active
active
active
active
active
active
active
active
active
active
, I , I , U , U
L1 L2 L3 L1
Operational condi-
tion 0
f ≥ 70 Hz
active
inactive
1)
inactive
1)
inactive
inactive
inactive
inactive
inactive
2)
inactive
active
3)
inactive
inactive
1)
inactive
inactive
inactive
active
inactive
inactive
inactive
inactive
inactive
active
inactive
active
active
U ) of the device, at least
L2 L3
343