ABB Relion 670 Series Applications Manual page 487

1MRK 511 401-UUS F
DecAmbTmp : This setting is used to set the December month average ambient temperature.
The hot spot temperature calculation is done by estimating the temperature rise between the hot
spot and the top oil. This difference is due to stray losses, local oil flows and additional paper on
conductor. The function has the following settings related to hot spot to top oil temperature
gradient calculation.
HPTmpRiseW1 : This setting is used to set the hot spot temperature rise of winding 1 above
ambient temperature in K (Kelvin).
HPTmpRiseW2 : This setting is used to set the hot spot temperature rise of winding 2 above
ambient temperature in K (Kelvin).
HPTmpRiseW3 : This setting is used to set the hot spot temperature rise of winding 3 above
ambient temperature in K (Kelvin).
TopOilTmpRise : This setting is used to set the top oil temperature rise above ambient
temperature in K (Kelvin).
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.
Bay control REC670
Application manual
The above setting values (
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.
© Copyright 2017 ABB. All rights reserved
HPTmpRiseWX and TopOilTmpRise ) should be obtained
Section 17
Monitoring
GUID-F6960AEE-E0F9-4675-B8F2-A5DD53B10FEA v1
GUID-6CB4E94E-1DC9-46DB-ADC0-F86922A8D611 v1
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