10.4.2.1
Verifying the settings
SEMOD128616-59 v3
Procedure
1.
Connect the test set for appropriate current injection to the appropriate IED
terminals.
If there is any configuration logic, which is used to enable or block any of 4
available overcurrent steps, make sure that step under test is enabled (that is,
end fault protection).
2.
Increase the injected current and note the operated value of the studied step of
the function.
3.
Decrease the current slowly and note the reset value.
4.
Block higher set stages when testing lower set stages according to below.
5.
Connect a trip output contact to a timer.
6.
Set the injected current to 200% of the operate level of the tested stage,
switch on the current and check the time delay.
For inverse time curves, check the operate time at a current equal to 110% of
the operate current for
tmin
.
7.
Check that all trip and start contacts operate according to the configuration
(signal matrixes)
8.
Repeat the above described tests for the higher set stages.
9.
Finally check that start and trip information is stored in the event menu.
10.4.2.2
Completing the test
SEMOD128616-83 v2
Continue to test another function or end the test by changing the
TESTMODE
setting to
Off
. Restore connections and settings to their original values, if they were
changed for testing purposes.
10.4.3
Four step residual overcurrent protection, (Zero sequence
or negative sequence directionality) EF4PTOC
SEMOD53296-3 v9
Prepare the IED for verification of settings outlined in Section
Values of the logical signals for D2PTOC are available on the local HMI under
Main menu/Tests/Function status/Current protection/
ResidualOverCurr4Step(51N_67N,4(IN>))/EF4PTOC(51N_67N;4(IN>)):x
,
where x = instance number.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
10.4.3.1
Four step directional earth fault protection
SEMOD53296-208 v7
Section 10
1MRK 505 372-UEN A
Testing functionality by secondary injection
92
Busbar protection REB670 2.2 IEC
Commissioning manual
