Siemens SIPROTEC 7UM62, Manual

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4.34 Operating Ranges of the Protection Functions
455
7UM62 Manual
C53000-G1176-C149-3
4.34 Operating Ranges of the Protection Functions
Table 4-1 Operating Ranges of the Protection Functions
Operat. cond. 0 Operational condition 1 Operat. cond. 0
Protection function f
≤
10 Hz 11 Hz
<
f/Hz
≤
40 40 Hz
≤
f/Hz
≤
69 f
≥
70 Hz
Definite-time overcurrent prot. (50, 51, 67) active active active active
Inverse-time overcurrent protection (51V) inactive active active inactive
Thermal overload protection (49) inactive
1
) active active inactive
1)
Unbalanced load protection (46) inactive
1
) active active inactive
1)
Startup overcurrent protection (51) active inactive inactive active
Differential protection (87G/87T) active active active active
Earth current differential protection (87GN/TN) inactive active active inactive
Underexcitation protection (40) inactive active active inactive
Reverse power protection (32R) inactive active active inactive
Forward power supervision (32F) inactive active active inactive
Impedance protection (21) inactive active active inactive
Out–of–step protection (78) inactive active active inactive
Undervoltage protection (27) inactive
2)
active active inactive
2)
Overvoltage protection (59) active active active active
Overfrequency protection (81/O) inactive active active inactive
3)
Underfrequency protection (81/U) inactive active active inactive
Overexcitation protection U/f> (24) inactive
1
) active active inactive
1
)
Inverse undervoltage protection (27) inactive
2)
active active inactive
2
)
Rate-of-frequency-change protection (81R) inactive active
4
) active inactive
Jump of voltage vector inactive active
5
) active
5
) inactive
90–% Stator earth fault prot. (59N, 64G, 67G) active active active active
Sensitive earth fault protection (51GN, 64F) inactive active active inactive
100–% S/E/F with 3rd harm. (27TN, 59TN) inactive active active inactive
100–% stator earth fault protection(20 Hz)
(64G) active active active active
Rotor earth fault protection (64R) active active active active
Rotor earth fault protection (64R) active active active active
Motor starting time supervision (48) inactive active active inactive
Restart inibit for motors (66, 49
Rotor
) inactive active active inactive
Breaker Failure Protection (50BF) inactive active active inactive
Inadvertent energization (50/27) active active active active
DC voltage protection (59N
DC
, 51N
DC
) active active active active
Threshold Monitoring inactive active active inactive
External trip coupling active active active active
Temperature detection by thermoboxes active active active active