ABB Relion 670 Series Applications Manual page 514

Section 18
Monitoring
RatedCurrW1 : This setting is used to set the rated RMS current of winding 1 in A.
RatedCurrW2 : This setting is used to set the rated RMS current of winding 2 in A.
RatedCurrW3 : This setting is used to set the rated RMS current of winding 3 in A.
CurrTypeTestW1 : This setting is used to set the RMS value of the current which is applied
during the type test in A for winding 1.
CurrTypeTestW2 : This setting is used to set the RMS value of the current which is applied
during the type test in A for winding 2.
CurrTypeTestW3 : This setting is used to set the RMS value of the current which is applied
during the type test in A for winding 3.
The following settings are required to perform the insulation loss of life calculation:
EnaAgeCalc : This setting is used to enable or disable the transformer insulation loss of life
calculation. It has the following options:
Enable : Transformer insulation age calculation is enabled.
•
Disable : Transformer insulation age calculation is disabled. The function only calculates up
•
to hot spot temperature and age calculation will not take place.
InitialLife : This setting is used to set the transformer initial insulation loss of life. This should
be set before implementing the function in service. If it is a newly installed transformer, this
setting should be set as zero hours and if it is previously installed transformer then, the user
should predetermine the transformer insulation life consumed in hours and set it. If the
transformer insulation loss of life value will start from this value and at any time the insulation
loss of life value can be reset with this value by activating LOLRST from local HMI reset menu.
ExpectedLife : The transformer expected insulation life in hours can be set by this setting. As
per IEEE C57.91-1995 the normal life expectancy at a continuous hot spot temperature of 110 ̊ C
is 180,000 Hours.
AgeingRateMeth : This setting is used to select the method to be used for transformer
insulation relative ageing rate calculation between IEC standard method and IEEE standard
method. It has the following options:
• IEC : Transformer insulation age calculation based on IEC standard method.
IEEE : Transformer insulation age calculation based on IEEE standard method.
•
ThermalUpgrade : This setting is used to select the transformer insulation paper type between
thermally upgraded insulation and normal insulation. It has the following options:
Upgraded : The function considers the given transformer has thermally upgraded paper
•
insulation.
Normal : The function considers the given transformer has normal insulation.
•
TimeToUpdate : This setting is used to set the time interval for updating the transformer
insulation loss of life calculation outputs LOLINDAY and LOLINYRS. It can be selected as 1
hour/ 2 hour/ 4 hour/ 8 hour/ 12 hour/ 24 hour depending on user requirement.
Two settable warning levels are available for hot spot temperature with separate outputs. If
warning level exceeds for the set time, an alarm is generated.
508
The above setting values (
obtained from the manufacturer based on certified heat run test reports
conducted at maximum rating given in the name plate. The IEEE C57.91-1995
also recommends assuming a value of 80 °C for a 65 °C average winding rise
and a value of 65 °C for a 55 °C average winding rise on its nameplate,
respectively.
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HPTmpRiseWX and TopOilTmpRise ) should be
1MRK 511 401-UEN Rev. K
GUID-6CB4E94E-1DC9-46DB-ADC0-F86922A8D611 v1
GUID-B170CF21-839E-4246-A607-55A8999FAD07 v1
Bay control REC670
Application manual