ABB REC670 Applications Manual page 563

1MRK 511 401-UUS A
Bay control REC670 2.2 ANSI
Application manual
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).
The above setting values (HPTmpRiseWX and TopOilTmpRise) should
be 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.
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.
Section 17
Monitoring
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