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Prepare the IED for verification of settings as outlined in section
Values of the logical signals for EF4PTOC are available on the local HMI under Main menu/
Tests/Function status/Current/EF4PTOC(51N67N,4IN>)/EF4PTOC:X. The Signal Monitoring
in PCM600 shows the same signals that are available on the local HMI.
7.3.6.1
Four step directional residual overcurrent protection
SEMOD53296-208 v5
1.
Connect the test set for single current injection to the appropriate IED terminals.
Connect the injection current and voltage to terminals L1 and neutral.
2.
Set the injected polarizing voltage slightly larger than the set minimum polarizing voltage
(default 1% of Ur) and set the injection current to lag the voltage by an angle equal to the
set reference characteristic angle (
AngleRCA), if the forward directional function is
selected.
If reverse directional function is selected, set the injection current to lag the polarizing
voltage by an angle equal to RCA+ 180°.
3.
Increase the injected current and note the value at which the studied step of the function
operates.
4.
Decrease the current slowly and note the reset value.
5.
If the test has been performed by injection of current in phase L1, repeat the test,
injecting current into terminals L2 and L3 with a polarizing voltage connected to
terminals L2, respectively L3.
6.
Block lower set steps when testing higher set steps according to the instructions that
follow.
7.
Connect a trip output contact to a timer.
8.
Set the injected current to 200% of the operate level of the tested step, 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
txMin.
9.
Check that all trip and start contacts operate according to the configuration (signal
matrixes)
10. Reverse the direction of the injected current and check that the step does not operate.
11.
Check that the protection does not operate when the polarizing voltage is zero.
12.
Repeat the above described tests for the higher set steps.
13. Finally, check that start and trip information is stored in the event menu.
7.3.6.2
Four step non-directional residual overcurrent protection
SEMOD53296-202 v4
1.
"Four step directional residual overcurrent protection"
applying any polarizing voltage.
7.3.6.3
Completing the test
SEMOD53296-122 v4
Continue to test another function or end the testing by setting the parameter
TestMode to Off
under Main menu/Tests/IED test mode/TESTMODE:1. If another function is tested, then set
the parameter
Blocked to No under Main menu/Tests/Function test modes/Current/
EF4PTOC(51N67N,4IN>)/EF4PTOC:X for the function, or for each individual function in a chain,
to be tested next. Remember to set the parameter
Blocked to Yes, for each individual function
that has been tested.
Section 7
1MRK 505 293-UEN B
Testing functionality
48
Breaker protection REQ650
Commissioning manual
© Copyright 2013 ABB. All rights reserved
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