Four Step Residual Overcurrent Protection Ef4Ptoc (51N/67N); Four Step Directional Residual Overcurrent Protection; Four Step Non-Directional Residual Overcurrent Protection; Completing The Test - ABB Relion 650 Series Commissioning Manual

Section 7
Testing functionality
tested next. Remember to set the parameter
been tested.
7.3.6

Four step residual overcurrent protection EF4PTOC (51N/67N)

Prepare the IED for verification of settings as outlined in
Values of the logical signals for EF4PTOC (51N67N) are available on the local HMI under Main
menu/Tests/Function status/Current/EF4PTOC(51N67N,4IN>)/X:EF4PTOC. 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

1. Connect the test set for single current injection to the appropriate IED terminals.
Connect the injection current to terminals A and neutral, or to terminals N and neutral.
2. Set the injected polarizing voltage slightly larger than the set minimum polarizing voltage
(default 1% of Vn) and set the injection current to lag the voltage by an angle equal to the set
reference characteristic angle (
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 A, repeat the test when
injecting current into terminals B and C with a polarizing voltage connected to terminals B
respectively C.
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
9. Check that all trip and trip 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 pickup and trip information is stored in the event menu.
7.3.6.2

Four step non-directional residual overcurrent protection

1. Do as described in
applying any polarizing voltage.
7.3.6.3

Completing the test

Continue to test another function or end the testing by setting the parameter
Disabled under Main menu/Tests/IED test mode/1:TESTMODE. If another function is tested, then
set the parameter
EF4PTOC(51N67N,4IN>)/X:EF4PTOC for the function, or for each individual function in a chain, to
46
AngleRCA ) if the forward directional function is selected.
txMin .
"Four step directional residual overcurrent
Blocked to No under Main menu/Tests/Function test modes/Current/
© Copyright 2011 ABB. All rights reserved
Blocked to Yes , for each individual function that has
6.1"Preparing the IED to verify
protection", but without
1MRK 505 268-UUS A
SEMOD53296-3 v6
settings".
SEMOD53296-208 v4
SEMOD53296-202 v3
SEMOD53296-122 v4
TestMode to
Breaker protection REQ650
Commissioning manual