Table 30. Full-scheme distance protection, Mho characteristic ZMHPDIS
Function Range or value Accuracy
Number of zones, Ph-E Max 4 with selectable direction -
Minimum operate current (10–30)% of IBase -
Positive sequence impedance,
Ph-E loop
(0.005–3000.000) W/phase
± 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
Positive sequence impedance
angle, Ph-E loop
(10–90) degrees
Reverse reach, Ph-E loop
(Magnitude)
(0.005–3000.000) Ω/phase
Magnitude of earth return
compensation factor KN
(0.00–3.00)
Angle for earth compensation
factor KN
(-180–180) degrees
Dynamic overreach <5% at 85 degrees measured
with CVT’s and 0.5<SIR<30
-
Definite time delay Ph-Ph and Ph-
E operation
(0.000-60.000) s ± 0.2% or ± 60 ms whichever is greater
Operate time 22 ms typically IEC 60255-121
Reset ratio 105% typically -
Reset time at 0.5 to 1.5 x Zreach Min = 30 ms
Max = 45 ms
-
Table 31. Full-scheme distance protection, quadrilateral for earth faults ZMMPDIS
Function
Range or value Accuracy
Number of zones Max 5 with selectable direction -
Minimum operate current (10-30)% of
IBase
-
Positive sequence reactance
(0.50-3000.00) W/phase
±2.0% static accuracy
±2.0 degrees static angular accuracy
Conditions:
Voltage range: (0.1-1.1) x U
r
Current range: (0.5-30) x I
r
Angle: at 0 degrees and 85 degrees
Positive sequence resistance (0.10-1000.00) Ω/phase
Zero sequence reactance (0.50-9000.00) Ω/phase
Zero sequence resistance (0.50-3000.00) Ω/phase
Fault resistance, Ph-E
(1.00-9000.00) W/loop
Dynamic overreach <5% at 85 degrees measured with
CCVT’s and 0.5<SIR<30
-
Definite time delay Ph-Ph and Ph-
E operation
(0.000-60.000) s ±0.2% or ±40 ms whichever is greater
Operate time 25 ms typically IEC 60255-121
Reset ratio 105% typically -
Reset time at 0.1 to 2 x Zreach Min. = 20 ms
Max. = 35 ms
-
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
58 ABB
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