ABB Relion 670 Series Commissioning Manual page 189

1MRK 504 165-UEN E
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
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
IOC> (for example, 1.2 · 1.35 · 0.587A = 0951A at 50Hz for this SCB) in phase L1 only.
2. Check that function binary output signals STOCL1 and STOC are set to one.
3. Check that function binary output signals TROC and TRIP are set to one after the set time
under parameter
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 L1, 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 L2 and phase L3.
Undercurrent feature
1. Inject SCB rated current (that is, 0.587A at 50Hz for this SCB) in all three phases.
2. Lower phase L1 current 10% under the set value for setting parameter
0.7 · 0.587A = 0.370A at 50Hz for this SCB).
3. Check that function binary output signals STUCL1 and STUC are set to one.
4. Check that function binary output signals TRUC and TRIP are set to one after the set time
under parameter
5. 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.
6. Check that service value from the function for current in phase L1, on the local HMI under
Main menu/Test is approximately 185A (that is, 0.370A · (500/1) = 185A).
Transformer protection RET670
Commissioning manual
Note that during testing the overcurrent feature the harmonic voltage overload
feature or reactive power overload feature may also give start and operate
signals depending on their actual settings. Therefore it is best to switch them
off during this test.
tOC (that is, 30s for this SCB) has expired.
Note that the operation of this feature is based on current peak value. That
means that this overcurrent function is also able to operate 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.
tUC (for example, 5s for this SCB) has expired.
© Copyright 2017 ABB. All rights reserved
Testing functionality by secondary injection
tReconnInhibit (for example 300s for this SCB) has
Section 11
GUID-7E1A7532-7A45-4DA2-A0F3-CE300F8A48BF v3
GUID-5C2ED7D0-9BE3-40DC-82C0-C351878D4568 v2
IUC< (that is, 0.9 ·
183