Verifying The Settings And Operation Of The Function - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UUS Rev. K
Connect the secondary test set to the CT inputs on the IED dedicated for the SCB currents. Single- or
three-phase test equipment can be used but it may be required to have facility to vary the frequency of
the injected current signal(s).
11.4.16.1

Verifying the settings and operation of the function

Reconnection inhibit feature
1. Inject SCB rated current (that is, 0.587A at 50Hz for this SCB) in at least one phase (preferably
perform this test with three phase injection).
2. After couple of seconds stop injection of all currents (that is, set all currents back to 0A).
3. Check that function binary output signal RECNINH is set to logical 1 and that only resets after the
set time under parameter tReconnInhibit (for example 300s for this SCB) has expired.
4. If this binary signal is used to prevent CB closing make sure that it is properly connected/wired into
the CB closing circuit.
Overcurrent feature
1. Inject current 20% bigger than the set overcurrent pickup level under setting parameter PU 51 (for
example, 1.2 · 1.35 · 0.587A = 0951A at 50Hz for this SCB) in phase A only.
2. Check that function binary output signals PU_51_A and PU_OC are set to one.
3. Check that function binary output signals TROC and TRIP are set to one after the set time under
parameter tOC (that is, 30s for this SCB) has expired.
4. If any of these signals are used for tripping, signaling and/or local/remote indication check that all
relevant contacts and LEDs have operated and that all relevant GOOSE messages have been
sent.
5. Check that service value from the function for current in phase A, on the local HMI under Main
menu /Test is approximately 476A (that is, 0.951A · (500/1) = 476A).
6. Stop injection of all currents (that is, set all currents back to 0A).
7. Check that all above mentioned function binary output signals now have logical value zero.
8. Repeat above steps 1-7 for phase B and phase C.
Undercurrent feature
1. Inject SCB rated current (that is, 0.587A at 50Hz for this SCB) in all three phases.
2. Lower phase A current 10% under the set value for setting parameter PU_37 (that is, 0.9 · 0.7 ·
0.587A = 0.370A at 50Hz for this SCB).
3. Check that function binary output signals PU_37_A and PU_UC are set to one.
4. Check that function binary output signals TRUC and TRIP are set to one after the set time under
parameter tUC (for example, 5s for this SCB) has expired.
Bay control REC670
Commissioning manual
Note that during testing the overcurrent feature the harmonic voltage overload feature or
reactive power overload feature may also give pickup and trip signals depending on their
actual settings. Therefore it is best to switch them off during this test.
Note that the operation of this feature is based on current peak value. That means that
this overcurrent function is also able to trip for the same current magnitude but for
different injected frequencies. If required repeat this injection procedure for example for
the 3rd harmonic by just simply injecting 3 · 50 = 150Hz currents with the same
magnitude. Obtain results shall be the same.
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Section 11
Testing functionality by secondary injection
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GUID-7E1A7532-7A45-4DA2-A0F3-CE300F8A48BF v3
GUID-5C2ED7D0-9BE3-40DC-82C0-C351878D4568 v2
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