ABB Relion 670 series - Page 691

GUID-E8D0EE7C-D7B8-46C3-9C0D-363FFC75DE93 v4
Table 402: FTAQFVR (81A) technical data
Function Range or value Accuracy
Trip value, frequency high limit level
at symmetrical three phase voltage
(35.00 – 90.00) Hz ±2.0 mHz
Trip value, frequency low limit level
at symmetrical three phase voltage
(30.00 – 85.00) Hz ±2.0 mHz
Trip value, voltage high and low
limit for voltage band limit check
(0.0 – 200.0)% of VBase ±0.5% of V
n
at V ≤ V
n
±0.5% of V at V > V
n
Trip value, current pickup level (5.0 – 100.0)% of IBase ±1.0% of I
r
or 0.01 A at I≤I
n
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 ±200 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 ±200 ms whichever is
greater
1MRK 502 066-UUS B Section 10
Frequency protection
685
Technical manual