Hitachi Relion 670 Series Product Manual page 95

Line differential protection RED670
Version 2.2
Table 50. High speed distance protection ZMFPDIS, ZMFCPDIS
Function
Number of zones
Minimum operate current, Ph-Ph
and Ph-E
Positive sequence reactance
reach, Ph-E and Ph-Ph loop
Positive sequence resistance
reach, Ph-E and Ph-Ph loop
Zero sequence reactance reach
Zero sequence resistive reach
Fault resistance reach, Ph-E and
Ph-Ph
Dynamic overreach
Reset ratio
Directional blinders
Resistance determining the load
impedance area - forward
Angle determining the load
impedance area
Definite time delay to trip, Ph-E
and Ph-Ph operation
Operate time
Reset time at 0.1 to 2 x Zreach
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GUID-6C2EF52A-8166-4A23-9861-38931682AA7D v8
Range or value Accuracy
5 selectable -
directions, 2 fixed
directions
(5-6000)% of IBase ±1.0% of I
(0.01 - 3000.00) Pseudo continuous ramp:
ohm/p ±2.0% of set value
Conditions:
(0.00 - 1000.00)
Voltage range: (0.1-1.1) x U
ohm/p
Current range: (0.5-30) x I
(0.01 - 9000.00)
Angle: At 0 degrees and 85 degrees
ohm/p
IEC 60255-121 points A,B,C,D,E
(0.00 - 3000.00)
ohm/p
(0.01 -9000.00) ohm/l
< 5% at 85 degrees -
measured with CVTs
and 0.5 < SIR < 30,
IEC 60255-121
105% typically -
Forward: -15 – 120 Pseudo continuous ramp:
degrees ±2.0 degrees, IEC 60255-121
Reverse: 165 – -60
degrees
(0.01 - 5000.00) Pseudo continuous ramp:
ohm/p ±2.0% of set value
Conditions:
Tested at ArgLd = 30 degrees
5 - 70 degrees Pseudo continuous ramp:
±2.0 degrees
Conditions:
Tested at RLdFw = 20 ohm/p
(0.000-60.000) s ±0.2% of set value or ±35 ms whichever is greater
16 ms typically, IEC -
60255-121
Min. = 20 ms -
Max. = 35 ms
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r
r
r
1MRK 505 379-BEN R
Ramp of shots:
±2.0% of set value
Conditions:
IEC 60255-121 point B
Ramp of shots:
±5.0% of set value
Conditions:
Tested at ArgLd = 30 degrees
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