ABB Relion 670 Series Commissioning Manual page 104

Section 10
Testing functionality by secondary injection
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
Procedure to test inverse time delayed step:
The following points on the inverse curve are defined per relevant IEC/ANSI standards for time multiplier
value set to k_HOL_IDMT=1.0
UpeakRMS [pu]
Time [s]
Here will be shown how to test the fourth point from the above table. Other points can be tested in the
similar way:
1. Inject 140% of the base current (that is, 1.4 · 0.587A = 0.822A at 50Hz for this SCB) in phase
Aonly.
2. Check that function binary output signals PU_HOL_IDMT_A and PU_HOL are set to one.
3. Check that function binary output signals TRHOL and TRIP are set to one after the expected time
(for example, 15s for this voltage level in accordance with the above table) 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 for current in phase A, on the local HMI under Main menu /Test is
approximately 411A (that is, 0.822A · (500/1) = 411A).
6. Check that service value for voltage across SCB in phase A, on the local HMI under Main menu /
Test is approximately 140%.
7. Stop injection of all currents (that is, set all currents back to 0A).
98
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
Note that during testing the harmonic voltage overload feature the reactive power
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.
1.15
1800
Note that operation of this feature is based on internally calculated voltage peak RMS
value. That means that this feature is also able to trip for current signals with varying
frequency.
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1.2 1.3 1.4
300 60 15
1MRK 505 372-UUS Rev. K
(Equation 13)
GUID-3C6B2C73-026D-4173-BD4D-1E7E9ADAE160 v3
1.7 2.0 2.2
1 0.3 0.12
GUID-FECBCAD4-16CE-4EFC-9869-9F6D98E2F721 v2
Busbar protection REB670
Commissioning manual