ABB 1MRK002826-AG - Page 97

GUID-E8D0EE7C-D7B8-46C3-9C0D-363FFC75DE93 v5
Table 79. Frequency accumulation protection FTAQFVR
Function Range or value Accuracy
Operate value, frequency high limit level at
symmetrical three phase voltage
(35.00 – 90.00) Hz ±2.0 mHz
Operatevalue, frequency low limit level at
symmetrical three phase voltage
(30.00 – 85.00) Hz ±2.0 mHz
Operate value, voltage high and low limit
for voltage band limit check
(0.0 – 200.0)% of UBase ±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Operate value, current start level (5.0 – 100.0)% of IBase ±1.0% of I
r
or 0.01 A at I≤I
r
Independent time delay for the continuous
time limit at f
set
+0.02 Hz to f
set
-0.02 Hz
(0.0 – 6000.0) s ±0.2% or ±250 ms whichever is greater
Independent time delay for the
accumulation time limit at f
set
+0.02 Hz to
f
set
-0.02 Hz
(10.0 – 90000.0) s ±0.2% or ±250 ms whichever is greater
Generator protection REG670
1MRK 502 074-BEN M
Version 2.2
Hitachi Power Grids 97
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