Completing The Test; Estimation Of Transformer Insulation Life Lolsptr; Verifying The Signals And Settings - ABB RET670 Commissioning Manual
Relion 670 series, transformer protection
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Also See for RET670:
- Applications manual (1016 pages) ,
- Commissioning manual (328 pages) ,
- Installation and commissioning manual (240 pages)
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1MRK 504 165-UEN A
11.13.6.1
11.13.7
11.13.7.1
Transformer protection RET670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection
the function and check that the counter result corresponds to the number of
operations.
Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
Estimation of transformer insulation life LOLSPTR
Prepare the IED for verification of settings outlined in Section
to verify
settings".
Verifying the signals and settings
Time measurement and the injection of current and voltage can be done using
common test equipment.
Verifying HPTMPMAX and TOTCALC outputs
1.
Connect the test set for injection of three-phase currents to the appropriate
current terminals of the IED.
2.
Activate the TOTVALID input and set some temperature value in TOTEMP
input.
3.
Supply the IED with three-phase currents slightly more than the rated value.
4.
Make sure that the hot spot temperature (HPTMPMAX) is more than the set
value of TOTEMP.
5.
Activate the AMBVALID input and set some temperature value in
AMBTEMP input.
6.
Make sure that the top oil temperature calculated (TOTCALC) is more than
the set value of AMBTEMP.
Verifying WARNINGx and ALARMx outputs
1.
Connect the test set for injection of three-phase currents to the appropriate
current terminals of the IED.
2.
Make sure that the settings in the IED are appropriate, especially the warning
temperature levels (WrnHPTmpLevX) and alarm time settings
(tDelayToAlarmX).
3.
Supply three-phase currents nearly zero to the IED and take note of hot spot
temperature (HPTMPMAX).
4.
Make sure that the WARNINGx and ALARMx signals remains low.
5.
Supply three-phase currents slightly more than the rated value to the IED and
take note of hot spot temperature (HPTMPMAX).
Observe the maximum permitted overloading of the current circuits in the
IED.
Section 11
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GUID-C08B2360-2134-43DD-9F39-54CD9FA45B5B v1
"Preparing the IED
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GUID-85CA2ABF-13A9-4A4B-8E3F-AEF71D091E32 v1
269
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