ABB Relion 670 Series Product Manual page 73

Generator protection REG670
Version 2.2
Impedance protection
Table 44. Full-scheme distance protection, Mho characteristic ZMHPDIS
Function
Number of zones, Ph-E
Minimum operate current
Positive sequence impedance,
Ph-E loop
Positive sequence impedance
angle, Ph-E loop
Reverse reach, Ph-E loop
(Magnitude)
Magnitude of earth return
compensation factor KN
Angle for earth compensation
factor KN
Dynamic overreach
Definite time delay Ph-Ph and
Ph-E operation
Operate time
Reset ratio
Reset time at 0.5 x Zreach to
1.5 x Zreach
Hitachi Power Grids
SEMOD173242-2 v14
Range or value
Max 4 with selectable
direction
(10–30)% of IBase
(0.005–3000.000) W/phase
(10–90) degrees
(0.005–3000.000) Ω/phase
(0.00–3.00)
(-180–180) degrees
<5% at 85 degrees
measured with CVT's and
0.5<SIR<30
(0.000-60.000) s
22 ms typically
105% typically
Min. = 30 ms
Max. = 50 ms
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Accuracy
-
-
±2.0% static accuracy
Conditions:
Voltage range: (0.1-1.1) x U
r
Current range: (0.5-30) x I
r
Angle: 85 degrees
-
±0.2% or ±60 ms whichever is greater
IEC 60255-121
-
-
1MRK 502 074-BEN M
73