Siemens SIPROTEC 7UM62 - 4.18 Overexcitation (Volt;Hertz) Protection (ANSI 24)

Technical Data
4.18 Overexcitation (Volt/Hertz) Protection (ANSI 24)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
492
4.18 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>>
(Alarm 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. 0.98
Thermal replica
(presetting and stage characteristic)
see Figure 4-13
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