ABB rec670 Commissioning Manual page 118
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Also See for rec670:
- Applications manual (658 pages) ,
- Product manual (139 pages) ,
- Operator's manual (116 pages)
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Section 10
Testing functionality by secondary injection
112
Reactive power overload feature
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.
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).
6.
Check that service value from the function for reactive power in phase L1, 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 L2 and phase L3.
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 operate 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.
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.
f
[ ]
[ ]
=
×
2
Q pu
rated
I
pu
f
injected
EQUATION2273 V1 EN
Harmonic voltage overload feature
1MRK 511 360-UEN A
(Equation 13)
Bay control REC670 2.1 IEC
Commissioning manual
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