ABB Relion 670 Series Product Manual page 76

Generator protection REG670
Version 2.2
Table 50. STTIPHIZ technical data
Function
Fault resistance sensitivity
Injection frequency
Injection voltage
Trip limit of fault resistance
Alarm limit of fault resistance
Operate time, start at R ~ 0Ω and filter
f
length = 1 s
Operate time, trip at R ~ 0Ω and filter
f
length = 1 s
Alarm time delay at R ~ 0Ω and filter length
f
= 1 s
Table 51. Underimpedance protection for generators and transformers ZGVPDIS
Function
Number of zones
Forward reach
Reverse reach
Impedance angle
Reset ratio
Start time at 1.2 x set impedance to 0.8 x
set impedance
Independent time delay to operate at 1.2 x
set impedance to 0.8 x set impedance
76
GUID-956187E5-A466-47BF-B671-F46548A5DF2E v4
Range or value
Can be reached at steady state
operating condition of the
machine
Typically
(50.000 - 250.000) Hz
240 V
(100 - 10000)Ω
(100 - 100000)Ω
1.00 s typically
3.00 s typically
(0.00 - 600.00) s
GUID-E8104D00-3183-4F55-89F9-A74B14BFE6FE v7
Range or value
3
(3.0 - 200.0)% of Z
r
where Z =UBase/√3∗IBase
r
(3.0 - 200.0)% of Z
r
where Z =UBase/√3∗IBase
r
(5 - 90) degrees
105% typically
Min. = 15 ms
Max. = 35 ms
(0.000 – 60.000) s
© Copyright 2017 Hitachi Power Grids. All rights reserved
Accuracy
50 kΩ
10 kΩ
±0.1 Hz
±5% of 1 kΩ at R ≤ 1 kΩ
f
±10% of set value at R > 1 kΩ
f
±5% of 1 kΩ at R ≤ 1 kΩ
f
±10% of 10 kΩ at 1 kΩ < R ≤ 10 kΩ
f
±50% of set value at R > 10 kΩ
f
-
-
±0.2% or ± 2.00 s whichever is greater
Accuracy
-
±5.0% of set impedance
Conditions:
Voltage range: (0.1 - 1.1) x U
r
Current range: (0.5 - 30) x I
r
±5.0% of set impedance
Conditions:
Voltage range: (0.1 - 1.1) x U
r
Current range: (0.5 - 30) x I
r
-
-
-
±0.2% or ±40 ms whichever is greater
1MRK 502 074-BEN M
Hitachi Power Grids