ABB Relion 670 Series Product Manual page 97

Generator protection REG670
Version 2.2
Table 79. 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
Independent time delay for the
accumulation time limit at f
f -0.02 Hz
set
Hitachi Power Grids
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
set
(10.0 – 90000.0) s
+0.02 Hz to
set
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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 502 074-BEN M
97