ABB 1MRK002826-AG - Frequency protection

Frequency protection
M13360-1 v16
Table 76. Underfrequency protection SAPTUF
Function Range or Value Accuracy
Operate value, start function, at
symmetrical three phase voltage,
StartFrequency
1)
(35.00 - 75.00) Hz ±2.0 mHz
Reset hysteresis 10.0 mHz fixed ±2.0 mHz
Operate time
1)
fr = 50 Hz
Start time measurement
with sudden frequency
change
Min. = 175 ms -
Max. = 195 ms
Start time measurement
with frequency ramp
Min. = 70 ms
Max. = 90 ms
fr = 60 Hz
Start time measurement
with sudden frequency
change
Min. = 150 ms -
Max. = 165 ms
Start time measurement
with frequency ramp
Min. = 60 ms
Max. = 75 ms
Disengaging time
1)
fr = 50 Hz
Start time measurement
with sudden frequency
change
Min. = 20 ms -
Max. = 30 ms
Start time measurement
with frequency ramp
Min. = 75 ms
Max. = 100 ms
fr = 60 Hz
Start time measurement
with sudden frequency
change
Min. = 20 ms -
Max. = 30 ms
Start time measurement
with frequency ramp
Min. = 65 ms
Max. = 90 ms
Operate time delay,
tDelay
1)
fr = 50 Hz
(0.000-60.000)s
±0.2% or ±200 ms
whichever is greater
fr = 60 Hz ±0.2% or ±175 ms
whichever is greater
Voltage dependent
time delay
Settings:
UNom = (50-150)% of UBase
UMin = (50-150)% of UBase
Exponent = 0.0-5.0
tMax = (0.010-60.000)s
tMin = (0.010- 60.000)s
()
measured
Exponent
UU
U UMin
t tMax tMin tMin
UNom UMin
=
-
éù
=×-+
êú
-
ëû
EQUATION1182 V2 EN-US
±1.0% or ±120 ms
whichever is greater
Note: The stated accuracy is valid for the voltage range 50 V – 250 V secondary.
1) The settings and test conditions are in accordance with IEC 60255-181 standard (section 6.2 – 6.7).
Generator protection REG670
1MRK 502 074-BEN M
Version 2.2
Hitachi Power Grids 95
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