Hitachi Relion 670 Series Product Manual page 68

Phasor measurement unit RES670
Version 2.2
Table 43. Rate-of-change frequency protection SAPFRC , continued
Function
Disengaging time *
Operate time delay *, tDelay
Test conditions:
Gs: ± 0.2 Hz/s
Frequency slope: 0.4 Hz/s
Test points: 10%, 20%, 30%, 50%
and 100% of the time delay setting
range
Reset time delay, tReset
Test conditions:
Gs: ±0.2 Hz/s
Frequency slope: 0.4 Hz/s
* The settings and test conditions are in accordance with IEC 60255-181 standard (section 6.2 – 6.7).
** The value ±0.05 Hz/s is used as minimum pickup value for frequency gradient.
Note! The stated accuracy is valid for phase-to-earth voltage range from 50 V to 250 V secondary. During testing three phase-to-earth voltages
with magnitude of 110/sqrt(3)=63.5 V were always used.
Table 44. Frequency accumulation protection FTAQFVR
Function
Operate value, frequency high limit level at
symmetrical three phase voltage
Operatevalue, frequency low limit level at
symmetrical three phase voltage
Operate value, voltage high and low limit for
voltage band limit check
Operate value, current start level
Independent time delay for the continuous
time limit at f +0.02 Hz to f
set set
Independent time delay for the accumulation
time limit at f +0.02 Hz to f
set set
68
Range and value
fr = 50 Hz Gs: ±0.05 Hz/s
Tested frequency slope:
1.2, 2.0, 5.0, 10.0 x Gs
Gs: ±5.00 Hz/s
Tested frequency slope:
1.2, 2.0 x Gs
Gs: ±10.00 Hz/s
Tested frequency slope:
1.2 x Gs
fr = 60 Hz Gs: ±0.05 Hz/s
Tested frequency slope:
1.2, 2.0, 5.0, 10.0 x Gs
Gs: ±5.00 Hz/s
Tested frequency slope:
1.2, 2.0 x Gs
Gs: ±10.00 Hz/s
Tested frequency slope:
1.2 x Gs
fr = 50 Hz (0.000-60.000) s
fr = 60 Hz
fr = 50 Hz (0.000-60.000) s
fr = 60 Hz
GUID-E8D0EE7C-D7B8-46C3-9C0D-363FFC75DE93 v5
Range or value
(35.00 – 90.00) Hz
(30.00 – 85.00) Hz
(0.0 – 200.0)% of UBase
(5.0 – 100.0)% of IBase
(0.0 – 6000.0) s
-0.02 Hz
(10.0 – 90000.0) s
-0.02 Hz
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Min. = 130 ms
Max. = 270 ms
Min. = 130 ms
Max. = 210 ms
Min. = 130 ms
Max. = 160 ms
Min. = 100 ms
Max. = 210 ms
Min. = 100 ms
Max. = 170 ms
Min. = 100 ms
Max. = 130 ms
Accuracy
±2.0 mHz
±2.0 mHz
±0.5% of U at U ≤ U
r r
±0.5% of U at U > U
r
±1.0% of I or 0.01 A at I≤I
r r
±0.2% or ±250 ms whichever is greater
±0.2% or ±250 ms whichever is greater
1MRK 511 410-BEN P
Accuracy
±0.2% or ±220 ms
whichever is greater
±0.2% or ±180 ms
whichever is greater
±0.2% or ±220 ms
whichever is greater
±0.2% or ±180 ms
whichever is greater
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