ABB REG670 Applications Manual page 669

1MRK 502 071-UEN -
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual
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.
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.
Section 17
Monitoring
663