Siemens Siprotec 7UM612 - Overexcitation (Volt;Hertz) Protection (ANSI 24)

4 Technical Data
326
7UM61 Manual
C53000-G1176-C127-3
4.13 Overexcitation (Volt/Hertz) Protection (ANSI 24)
Setting Ranges / Increments
Times
Dropout Ratios
Tripping Characteristic
Tolerances
Pickup threshold (Alarm Stage) 1.00 to 1.20 Increments 0.01
Pickup threshold of stage characteristic 1.00 to 1.40 Increments 0.01
Time Delays T U/f>, T U/f>>Warning Stage
and Stage Characteristic
0.00 s to 60.00 s
or ∞ (ineffective)
Increments 0.01 s
Characteristic value pairs U/f 1,05/1,10/1,15/1,20/1,25/1,30/1,35/1,40
Associated Time Delay for t (U/f) Thermal
Replica
0 s to 20,000 s Increments 1 s
Cooling time T
COOL
0 s to 20,000 s Increments 1 s
Alarm and Stage Characteristic
Pickup times for
1.1 · Setting value
approx. 60 ms
Dropout Times approx. 60 ms
Dropout/Pickup approx. 0.95
thermal replica (default setting) and stage
characteristic)
see Figure 4-6
Pickup on U/f 3 % of setting value
Delay times T
(Alarm and Stage Characteristic)
1 % of setting value or 10 ms
thermal replica (time characteristic) 5 %, related to U/f ± 600 ms
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