Verifying The Settings - ABB ret650 Commissioning Manual

1MRK 504 126-UEN -
6.4.2.1
Commissioning Manual
Values of the logical signals for OC4PTOC are available on the local HMI under
Main menu/Tests/Function status/Current/OC4PTOC(51_67,4I>)/
1:OC4PTOC. The Signal Monitoring in PCM600 shows the same signals that are
available on the local HMI.

Verifying the settings

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 or 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. The protection shall be 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 55° if forward directional function is
selected.
If 1 out of 3 currents for operation is chosen: The voltage angle of phase L1 is
the reference.
The voltage angle of phase L1 is the reference.
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 out 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 txMin.
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 6
Testing functionality
45