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Section 10
Testing functionality by secondary injection
236
6.1. Test the set timing defined byRatedOperCurr, RatedFltCurr,
OperNoRated, OperNoFault, DirCoef, CBLifeAlmLevel.
6.2. Vary the phase current in the selected phase from below rated operated
current, RatedOperCurr to above rated fault current, RatedFltCurr of a
breaker.
6.3. The remaining life of CB output CBLIFEPH is estimated when the CB is
changed from closed to open position. Check that the output CBLIFEPH is
decreased with a value that corresponds to the injected current.
6.4. CBLIFEAL is activated as soon as CBLIFEPH is below the set
CBLifeAlmLevel value.
7.
Test of accumulated energy
7.1. Test the actual set values defined by AccSelCal to Aux Contact,
ContTrCorr and AlmAccCurrPwr.
7.2. Inject phase current in the selected phase such that its value is greater than
set AccStopCurr value.
7.3. When the breaker goes to open position, accumulated energy IPOWPH is
calculated. The calculated value can be seen on the output IPOWPH.
7.4. Alarm signal IPOWALPH appears when IPOWPH is greater than set
AlmAccCurrPwr value.
7.5. Lockout signal IPOWLOPH appears if IPOWPH exceeds further to the
threshold value LOAccCurrPwr.
7.6. Calculation of accumulated energy IPOWPH is stopped when injected
current is lower than set AccStopCurr value.
8.
Test of CB operation cycles
8.1. Test the actual set values defined by OperAlmLevel and OperLOLevel.
8.2. The operation counter, NOOPER is updated for every close-open sequence
of the breaker by changing the position of auxiliary contacts POSCLOSE
and POSOPEN.
8.3. OPERALM is activated when NOOPER value exceeds the set
OperAlmLevel value. The actual value can be read on the output NOOPER.
8.4. OPERLO is activated when NOOPER value exceeds the set OperLOLevel
value.
9.
Test of CB spring charge monitoring
9.1. Test the actual set value defined by SpChAlmTime.
9.2. Enable SPRCHRST input. Also activate SPRCHRD after a time greater
than set time SpChAlmTime.
9.3. At this condition, SPCHALM is activated.
10. Test of CB gas pressure indication
10.1. Test the actual set value defined bytDGasPresAlm and tDGasPresLO.
10.2. The output GPRESALM is activated after a time greater than set time of
tDGasPresAlm value if the input PRESALM is enabled.
10.3. The output GPRESLO is activated after a set time of tDGasPresLO value if
the input PRESLO is enabled.
1MRK 506 355-UEN A
Line distance protection REL670 2.1 IEC
Commissioning manual
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