Full-Scheme Distance Measuring, Mho Characteristic Zmhpdis (21); Application - ABB RET670 Applications Manual

Section 3
IED application
Table 57: FDPSPDIS (21) Group settings (advanced)
Name Values (Range)
OperationZ< Disabled
Enabled
OperationI> Disabled
Enabled
IPh> 10 - 2500
Pickup_N 10 - 2500
TimerPP Disabled
Enabled
tPP 0.000 - 60.000
TimerPE Disabled
Enabled
tPG 0.000 - 60.000
3.6.4
3.6.4.1
260
Unit Step
- -
- -
%IB 1
%IB 1
- -
s 0.001
- -
s 0.001
Full-scheme distance measuring, Mho characteristic
ZMHPDIS (21)
Function description
Full-scheme distance protection, mho
characteristic

Application

Introduction
Transmission and sub-transmission networks are being extended and often become
more and more complex, consisting of a high number of multi-circuit and/or multi
terminal lines of very different lengths. These changes in the network will normally
impose more stringent demands on the fault clearing equipment in order to maintain an
unchanged or increased security level of the power system.
Full-scheme distance measuring, mho characteristic function (ZMHPDIS) in the IED is
designed to meet basic requirements for application on transmission and sub-
transmission lines (solid grounded systems) although it also can be used on distribution
levels.
Default Description
Enabled Operation of impedance based measurement
Disabled Operation of current based measurement
120 Start value for phase over-current element
20 Start value for trip from 3I0 over-current
element
Disabled Operation mode Disable/Enable of Zone
timer, Ph-Ph
3.000 Time delay to trip, Ph-Ph
Disabled Operation mode Disable/ Enable of Zone
timer, Ph-G
3.000 Time delay to trip, Ph-E
IEC 61850 IEC 60617 identification
identification
ZMHPDIS
1MRK504116-UUS C
ANSI/IEEE
C37.2 device
number
21
S00346 V1 EN
Application manual