Function Revision History; Four Step Directional Ground Fault Protection; Four Step Non-Directional Ground Fault Protection - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
11.4.2.1

Function revision history

Document
revision
A
B
C
D
E
F
G
H
J
11.4.2.2

Four step directional ground fault protection

1. Connect the test set for single current injection to the appropriate IED terminals.
Connect the injection current to terminals A and neutral.
2. Set the injected polarizing voltage slightly larger than the set minimum polarizing voltage (5% of
Vn) 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 trips.
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, 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 trip level of the tested step, switch on the current and check
the time delay.
For inverse time curves, check the trip time at a current equal to 110% of the trip current for txMin.
9. Check that all trip and pickup contacts trip according to the configuration (signal matrixes).
10. Reverse the direction of the injected current and check that the step does not trip.
11. Check that the protection does not trip 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.
11.4.2.3

Four step non-directional ground fault protection

1. Do as described in
108
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 Technical data table updated with note "Operate time and reset time are only valid if
harmonic blocking is turned off for a step".
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4 The phase selection logic is added to allow phase segregated trip. The new phase
selections outputs added to this release are PHSELL1, PHSELL2 and PHSELL3. The setting
EnPhaseSel is added to enable or disable phase selection. The maximum value changed to
2000.0 % of IBase for IMin1, IMin2, IMin3 and IMin4 settings.
2.2.5 The harmonic restrain function changed to freeze the definite and IDMT timers.
Section 11.4.2.2, but without applying any polarizing voltage.
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1MRK 511 409-UUS Rev. J
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SEMOD53296-208 v8
SEMOD53296-202 v5
Phasor measurement unit RES670
Commissioning manual