ABB Relion 670 Series Product Manual page 87

Generator protection REG670
Version 2.2
Table 65. Accidental energizing protection for synchronous generator AEGPVOC
Function
Operate value, overcurrent
Reset ratio, overcurrent
Transient overreach, overcurrent
function
Critical impulse time, overcurrent
Impulse margin time, overcurrent
Operate value, undervoltage
Critical impulse time, undervoltage
Impulse margin time, undervoltage
Operate value, overvoltage
Definite time delay, overcurrent, at 0
to 2 x I
set
Definite time delay, undervoltage, at
1.2 x U to 0.8 x U
set set
Definite time delay, overvoltage, at 0.8
x U to 1.2 x U
set set
Table 66. Generator stator overload protection GSPTTR
Function
Current start level for overload
protection
Reset ratio
Start time at 0 to 2 x I
set
Thermal time characteristic
Minimum operate time for
thermal characteristic
Maximum operate time for
thermal characteristic
Hitachi Power Grids
GUID-9B1C0C10-8AF9-4D9E-8076-B3E1C238D29A v8
Range or value
(5-900)% of IBase
>95% at (20–900)% of IBase
<10% at τ = 100 ms
10 ms typically at 0 to 2 x I
15 ms typically
(2-150)% of UBase
10 ms typically at 2 x U
15 ms typically
(2-200)% of UBase
(0.000-60.000) s
(0.000-60.000) s
(0.000-60.000) s
GUID-3C80D7DB-2ECA-4429-B1BA-2977C7ECE644 v4
Range or value
(105.0–900.0)% of IBase
>95%
Min. = 50 ms
Max. = 170 ms
According to
IEEE Std C50.13–2005
(1.0–120.0) s
(100.0–2000.0) s
© Copyright 2017 Hitachi Power Grids. All rights reserved
Accuracy
±1.0% of I at I≤I
r r
±1.0% of I at I>I
r
-
-
-
set
-
±0.5% of U at U ≤ U
r
±0.5% of U at U > U
to 0 -
set
-
±0.5% of U at U ≤ U
r
±0.5% of U at U > U
±0.2% or ±35 ms whichever is greater
±0.2% or ±35 ms whichever is greater
±0.2% or ±35 ms whichever is greater
Accuracy
±1.0% of I at I ≤ I
r r
±1.0% of I at I > I
r
±1.5% or ±200 ms whichever is greater
±1.5% or ±200 ms whichever is greater
±1.5% or ±200 ms whichever is greater
1MRK 502 074-BEN M
r
r
r
r
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