Technical Data; Full-Scheme Distance Measuring, Mho Characteristic Zmhpdis (21); Introduction - ABB Relion 670 Series Technical Reference Manual

1MRK505222-UUS C
6.3.7
6.4
6.4.1
Technical reference manual

Technical data

Table 117: FDPSPDIS (21) technical data
Function
Minimum operate current
Reactive reach, positive
sequence
Resistive reach, positive
sequence
Reactive reach, zero sequence
Resistive reach, zero sequence
Fault resistance, phase-to-
ground faults, forward and
reverse
Fault resistance, phase-to-
phase faults, forward and reverse
Load encroachment criteria:
Load resistance, forward and
reverse
Safety load impedance angle
Reset ratio
Full-scheme distance measuring, Mho characteristic
ZMHPDIS (21)
Function description
Full-scheme distance protection, mho
characteristic

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.
Range or value
IBase
(5-500)% of
(0.50–3000.00) Ω/phase
(0.10–1000.00) Ω/phase
(0.50–9000.00) Ω/phase
(0.50–3000.00) Ω/phase
(1.00–9000.00) Ω/loop
(0.50–3000.00) Ω/loop
(1.00–3000.00) Ω/phase
(5-70) degrees
105% typically
IEC 61850 IEC 60617 identification
identification
ZMHPDIS
Section 6
Impedance protection
Accuracy
-
± 2.0% static accuracy
± 2.0 degrees static angular
accuracy
Conditions:
Voltage range: (0.1-1.1) x V
Current range: (0.5-30) x I
n
Angle: at 0 degrees and 85
degrees
-
ANSI/IEEE
C37.2 device
number
21
S00346 V1 EN
n
239