ABB REC670 Applications Manual page 523

1MRK 511 401-UEN A
Bay control REC670 2.2 IEC
Application manual
JulyAmbTmp: This setting is used to set the July month average ambient
temperature.
AugAmbTmp: This setting is used to set the August month average ambient
temperature.
SepAmbTmp: This setting is used to set the September month average ambient
temperature.
OctAmbTmp: This setting is used to set the October month average ambient
temperature.
NovAmbTmp: This setting is used to set the November month average ambient
temperature.
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).
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.
Section 17
Monitoring
GUID-F6960AEE-E0F9-4675-B8F2-A5DD53B10FEA v1
517