GUID-9B1C0C10-8AF9-4D9E-8076-B3E1C238D29A v8
Table 64. Accidental energizing protection for synchronous generator AEGPVOC
Function
Range or value
Accuracy
Operate value, overcurrent
(5-900)% of IBase
±1.0% of I
r
at I≤I
r
±1.0% of I at I>I
r
Reset ratio, overcurrent
>95% at (20–900)% of IBase
-
Transient overreach, overcurrent function <10% at τ = 100 ms
-
Critical impulse time, overcurrent
10 ms typically at 0 to 2 x I
set
-
Impulse margin time, overcurrent
15 ms typically
-
Operate value, undervoltage
(2-150)% of UBase
±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Critical impulse time, undervoltage
10 ms typically at 2 x U
set
to 0
-
Impulse margin time, undervoltage
15 ms typically
-
Operate value, overvoltage
(2-200)% of UBase
±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Definite time delay, overcurrent, at 0 to 2
x I
set
(0.000-60.000) s
±0.2% or ±35 ms whichever is greater
Definite time delay, undervoltage, at 1.2 x
U
set
to 0.8 x U
set
(0.000-60.000) s
±0.2% or ±35 ms whichever is greater
Definite time delay, overvoltage, at 0.8 x
U
set
to 1.2 x U
set
(0.000-60.000) s
±0.2% or ±35 ms whichever is greater
GUID-3C80D7DB-2ECA-4429-B1BA-2977C7ECE644 v4
Table 65. Generator stator overload protection GSPTTR
Function
Range or value
Accuracy
Current start level for overload
protection
(105.0–900.0)% of IBase
±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Reset ratio
>95%
Start time at 0 to 2 x I
set
Min. = 50 ms
Max. = 170 ms
Thermal time characteristic
According to
IEEE Std C50.13–2005
±1.5% or ±200 ms whichever is greater
Minimum operate time for
thermal characteristic
(1.0–120.0) s
±1.5% or ±200 ms whichever is greater
Maximum operate time for
thermal characteristic
(100.0–2000.0) s
±1.5% or ±200 ms whichever is greater
1MRK 502 074-BEN A
Generator protection REG670 2.2 and Injection equipment REX060,
REX061, REX062
Product version: 2.2.1
ABB
77
