6.1.7
Technical data
Table 29:
ZQMPDIS (21) Technical data
Function
Range or value
Accuracy
Number of zones
5 with selectable
direction
-
Minimum operate current, phase-
to-phase and phase-to-ground
(10-30)% of IBase
± 2,0 % of I
n
Positive sequence impedance
reach for zones
(0.005 - 3000.000) Ω/
phase
± 2.0% static accuracy
± 2.0 degrees static angular accuracy
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
Fault resistance, phase-to-
ground
(1.00-3000.00) Ω/loop
Fault resistance, phase-to-phase (1.00-3000.00) Ω/loop
Line angle for zones
(0 - 180) degrees
Magnitude of ground return
compensation factor KN for
zones
0.00 - 3.00
-
Angle for ground return
compensation factor KN for
zones
(-180 - 180) degrees
-
Dynamic overreach
<5% at 85 degrees
measured with CVT’s
and 0.5<SIR<30
-
Impedance zone timers
(0.000-60.000) s
± 0.5% ± 10 ms
Operate time
30 ms typically without
CVT
-
Reset ratio
105% typically
-
Reset time
45 ms typically
-
1MRK 506 335-UUS A
Section 6
Impedance protection
125
Technical manual
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