
6.3.7
Technical data
Table 117:
FDPSPDIS (21) technical data
Function
Range or value
Accuracy
Minimum operate current
(5-500)% of
IBase
-
Reactive reach, positive
sequence
(0.50–3000.00) 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
Resistive reach, positive
sequence
(0.10–1000.00) Ω/phase
Reactive reach, zero sequence
(0.50–9000.00) Ω/phase
Resistive reach, zero sequence
(0.50–3000.00) Ω/phase
Fault resistance, phase-to-
ground faults, forward and
reverse
(1.00–9000.00) Ω/loop
Fault resistance, phase-to-
phase faults, forward and reverse
(0.50–3000.00) Ω/loop
Load encroachment criteria:
Load resistance, forward and
reverse
Safety load impedance angle
(1.00–3000.00) Ω/phase
(5-70) degrees
Reset ratio
105% typically
-
6.4
Full-scheme distance measuring, Mho characteristic
ZMHPDIS (21)
Function description
IEC 61850
identification
IEC 60617 identification ANSI/IEEE
C37.2 device
number
Full-scheme distance protection, mho
characteristic
ZMHPDIS
S00346 V1 EN
21
6.4.1
Introduction
The numerical mho line distance protection is a, up to five zone full scheme protection
for back-up detection of short circuit and ground faults. The full scheme technique
provides back-up protection of power lines with high sensitivity and low requirement
on remote end communication. The five zones have fully independent measuring and
settings, which gives high flexibility for all types of lines.
1MRK505222-UUS C
Section 6
Impedance protection
239
Technical reference manual
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