Frequency protection
M13360-1 v16
Table 82. 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
U
U
U
UMin
t
tMax
tMin
tMin
UNom UMin
=
-
é
ù
=
×
-
+
ê
ú
-
ë
û
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).
Line differential protection RED670
1MRK 505 379-BEN R
Version 2.2
Hitachi Energy
117
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Содержание Relion 670 Series
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