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7.3.3.2
Completing the test
SEMOD56287-118 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/
OC4PTOC(51_67,4I>)/OC4PTOC:1 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.
7.3.4
Four step phase overcurrent protection phase segregated
output OC4SPTOC
GUID-6A2C8C81-4CF7-4369-8DE0-06AC18F647F4 v2.1.1
Prepare the IED for verification of settings as outlined in section
Values of the logical signals for OC4SPTOC are available on the local HMI under Main menu/
Tests/Function status/Current/OC4SPTOC(51_67,4I>)/OC4SPTOC:1. The Signal Monitoring
in PCM600 shows the same signals that are available on the local HMI.
7.3.4.1
Verifying the settings
GUID-252DB4B0-C8C9-4BA4-8146-3FA4220D38B5 v3
1.
Connect the test set for appropriate current injection to the appropriate IED phases.
If there is any configuration logic that is used to enable/block any of the four available
overcurrent steps, make sure that the step under test is enabled, for example end fault
protection. Connect the symmetrical three-phase injection current into phases L1, L2 and
L3.
2.
Connect the test set for the appropriate three-phase voltage injection to the IED phases
L1, L2 and L3.
Make sure that the protection is fed with a symmetrical three-phase voltage.
3.
Set the injected polarizing voltage slightly larger than the set minimum polarizing voltage
(default is 5% of
UBase) and set the injection current to lag the appropriate voltage by an
angle of about 55° if 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 235° (equal to 55° + 180°).
4. Increase the injected current and note the operated value of the tested step of the
function.
5. Decrease the current slowly and note the reset value.
6. If the test has been performed by injection of current in phase L1, repeat the test when
injecting current into phases L2 and L3 with polarizing voltage connected to phases L2
respectively L3 (1 of 3 currents for operation).
7.
If the test has been performed by injection of current in phases L1 – L2, repeat the test
when injecting current into phases L2 – L3 and L3 – L1 with appropriate phase angle of
injected currents.
8. Block higher set stages when testing lower set stages according to below.
9. Connect a trip output contact to a timer.
10. 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 tnMin.
11. Check that all trip and start contacts operate according to the configuration (signal
matrixes).
12. Reverse the direction of the injected current and check that the protection does not
operate.
13. Repeat the above-described tests for the higher set stages.
14. Finally check that start and trip information is stored in the event menu.
Section 7
1MRK 505 293-UEN B
Testing functionality
46
Breaker protection REQ650
Commissioning manual
© Copyright 2013 ABB. All rights reserved
Содержание REQ650 1.3 IEC
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