ABB RET670 Commissioning Manual page 166

Section 10
Testing functionality by secondary injection
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 A, 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 B and phase C.
Reactive power overload feature
1. Inject current equal to the set reactive power overload pickup level under setting parameter
UP_QOL (that is, 1.3 · 0.587A = 0.763A at 50Hz for this SCB) in phase A only.
2. Check that function binary output signals PU_QOL_A and PU_QOL are set to one.
3. Check that function binary output signals TRQOL 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 A, on the local HMI under Main
menu/Test is approximately
6. Check that service value from the function for reactive power in phase A, on the local HMI
under Main menu/Test is approximately 169% (that is, 1.3 · 1.3 = 1,69pu = 169%).
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.
9. Repeat above steps 1 - 8 for phase B and phase C.
The following formula can be used to calculate SCB reactive power in per-unit system when
current with different frequency from the rated frequency is injected.
[ ]
Q pu
EQUATION2273 V1 EN-US
Harmonic voltage overload feature
160
Note that during testing the reactive power overload feature the harmonic voltage
overload feature or overcurrent feature may also give pickup and trip signals
depending on their actual settings. Therefore it is recommended to switch them
off during this test.
tQOL (for example, 60s for this SCB) has expired.
Note that operation of this feature is based on injected current and internally
calculated true RMS values. That means that this feature is also able to trip for
current signals with varying frequency. However due to relatively complex
calculation procedure it is recommended to do secondary tests only with
fundamental frequency current signals.
f
[ ]
= ×
2
rated I pu
f
injected
382A (that is, 0.763A · (500/1) = 382A).
1MRK 504 154-UUS B
GUID-6DA88E90-366A-494F-B3A4-F8B5A3FD6396 v3
(Equation 89)
GUID-3C6B2C73-026D-4173-BD4D-1E7E9ADAE160 v3
Commissioning manual