ABB REG670 - Impedance Protection; Characteristic ZMFPDIS (21); Full Scheme Distance Protection, Mho Characteristic ZMHPDIS; High Speed Distance Protection Zones, Quadrilateral and Mho

13.4 Impedance protection
SEMOD53525-1 v2
13.4.1 Full scheme distance protection, mho characteristic ZMHPDIS
(21)
M14944-3 v10
Prepare the IED for verification of settings outlined in Section "Preparing the IED to
verify settings".
Keep the current constant when measuring operating characteristics. Keep the current
as close as possible to its rated value or lower. But make sure it is higher than the set
minimum operating current.
Ensure that the maximum continuous current in an IED does not exceed four times its
rated value, if the measurement of the operating characteristics runs under constant
voltage conditions.
To verify the mho characteristic, at least two points should be tested.
In the following, three test points are proposed. The mho characteristic always goes
through the origin, which automatically gives a fourth point for the characteristic.
13.4.2 High speed distance protection zones, quadrilateral and mho
characteristic ZMFPDIS (21)
GUID-DF1650F4-EC3E-402B-BE26-EF2EF1034237 v6
Prepare the IED for verification of settings outlined in section
"Requirements" and
section "Preparing for test" in this chapter.
Measure operating characteristics during constant current conditions. Keep the
measured current as close as possible to its rated value or lower. But make sure it is
higher than the set minimum operating current.
Ensure that the maximum continuous current to the IED does not exceed four times its
rated value, if the measurement of the operating characteristics runs under constant
voltage conditions.
The test procedure has to take into consideration that the shaped load encroachment
characteristic is active. It is therefore necessary to check the setting. To verify the
settings with the shaped load encroachment characteristic the test should be carried out
according to figures
42 and 43 and tables 19 and 20. In cases where the load
encroachment characteristic is activated tests according to the adjusted figures should
be carried out.
To verify the settings for the operating points according to the following fault types
should be tested:
Section 13 1MRK 502 073-UUS A
Testing functionality by secondary injection
146 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual