6 Functions and settings
Maschinenfabrik Reinhausen GmbH 2016
125
5163667/00 EN
TRAFOGUARD® ISM®
If you are using a cooling system, you also need to enter the following pa-
rameters for each cooling stage.
You can set the following parameters:
▪
Calculation method
–
IEC 60076-7
–
IEEE Std C57.91
▪
Hot-spot factor (only with IEC 60076-7 calculation method)
▪
Gradient (only with IEC 60076-7 calculation method)
▪
Winding exponent (only with IEC 60076-7 calculation method)
▪
Oil time constant (only with IEC 60076-7 calculation method)
▪
k21 (only with IEC 60076-7 calculation method)
▪
k22 (only with IEC 60076-7 calculation method)
▪
Gradient (only with IEEE Std C57.91 calculation method)
▪
Exponent (only with IEEE Std C57.91 calculation method)
▪
Rated current of transformer (with IEC 60076-7 and IEEE Std C57.91
calculation methods)
▪
Winding time constant (with IEC 60076-7 and IEEE Std C57.91 calcula-
tion methods)
Note the relevant standard for more information about the parameters.
To set the parameters for the hot-spot calculation, proceed as follows:
1.
Go to
Settings > Parameters > Hot-spot
.
2.
Select the parameter you want.
3.
Set the parameter you want.
4.
Press the
Accept
button to save the modified parameter.
Setting calculation of transformer's loss of life (optional)
In order to calculate the transformer's aging rate, you need to set the follow-
ing parameters:
▪
Insulating paper
▪
Transformer age
▪
Anticipated service life
6.9
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