7.8.8 Technical data
GUID-6C2EF52A-8166-4A23-9861-38931682AA7D v7
Table 147: ZMFPDIS, ZMFCPDIS (21) technical data
Function Range or value Accuracy
Number of zones 3 selectable
directions, 3 fixed
directions
-
Minimum operate current,
phase-to-phase and phase-to-
ground
(5-6000)% of IBase ±1.0% of I
n
Positive sequence reactance
reach, phase-to-ground and
phase-to-phase loop
(0.01 - 3000.00)
ohm/p
Pseudo continuous ramp:
±2.0% of set value
Conditions:
Voltage range: (0.1-1.1) x V
n
Current range: (0.5-30) x I
n
Angle: At 0 degrees and 85
degrees
IEC 60255-121 points
A,B,C,D,E
Ramp of shots:
±2.0% of set value
Conditions:
IEC 60255-121 point B
Positive sequence resistance
reach, phase-to-ground and
phase-to-phase loop
(0.00 - 1000.00)
ohm/p
Zero sequence reactance
reach
(0.01 - 9000.00)
ohm/p
Zero sequence resistive reach (0.00 - 3000.00)
ohm/p
Fault resistance reach, phase-
to-ground and phase-to-phase
(0.01 -9000.00)
ohm/l
Dynamic overreach < 5% at 85 degrees
measured with CVTs
and 0.5 < SIR < 30,
IEC 60255-121
-
Reset ratio 105% typically -
Directional blinders Forward: -15 – 120
degrees
Reverse: 165 – -60
degrees
Pseudo continuous ramp:
±2.0 degrees, IEC 60255-121
Resistance determining the
load impedance area - forward
(0.01 - 5000.00)
ohm/p
Pseudo continuous ramp:
±2.0% of set value
Conditions:
Tested at ArgLd = 30
degrees
Ramp of shots:
±5.0% of set value
Conditions:
Tested at ArgLd = 30
degrees
Angle determining the load
impedance area
5 - 70 degrees Pseudo continuous ramp:
±2.0 degrees
Conditions:
Tested at RLdFw = 20 ohm/p
Definite time delay to trip,
phase-to-ground and phase-
to-phase operation
(0.000-60.000) s ±0.2% of set value or ±35 ms whichever is greater
Operate time 16 ms typically, IEC
60255-121
-
Reset time at 0.1 to 2 x Zreach Min. = 20 ms
Max. = 35 ms
-
Section 7 1MRK 502 066-UUS B
Impedance protection
328
Technical manual
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