ABB REC670 Applications Manual page 524

Section 17
Monitoring
518
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.
1MRK 511 401-UEN A
GUID-6CB4E94E-1DC9-46DB-ADC0-F86922A8D611 v1
GUID-B170CF21-839E-4246-A607-55A8999FAD07 v1
Bay control REC670 2.2 IEC
Application manual