Hitachi Relion 670 Series Commissioning Manual page 117

1MRK 511 403-UEN Rev. L
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 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 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 IUC< (that is, 0.9 · 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 tUC (for example, 5s for this SCB) has expired.
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).
7. Stop injection of all currents (that is, set all currents back to 0A).
8. Check that all above mentioned function binary output signals now have logical value zero
because they will be automatically blocked by operation of built-in reconnection inhibit feature.
9. Repeat above steps 1-8 for phase L2 and phase L3.
Reactive power overload feature
1. Inject current equal to the set reactive power overload pickup level under setting parameter
QOL> (that is, 1.3 · 0.587A = 0.763A at 50Hz for this SCB) in phase L1 only.
2. Check that function binary output signals STQOLL1 and STQOL are set to one.
3. Check that function binary output signals TRQOL and TRIP are set to one after the set time
under parameter tQOL (for example, 60s 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 L1, on the local HMI under Main
menu /Test is approximately 382A (that is, 0.763A · (500/1) = 382A).
Bay control REC670
Commissioning manual
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.
Note that during testing the reactive power overload feature the harmonic voltage
overload feature or overcurrent feature may also give start and operate signals
depending on their actual settings. Therefore it is recommended to switch them off
during this test.
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Section 11
Testing functionality by secondary injection
GUID-5C2ED7D0-9BE3-40DC-82C0-C351878D4568 v2
GUID-6DA88E90-366A-494F-B3A4-F8B5A3FD6396 v3
111