Electron MASTERTEMP, Instruction Manual

Page: 21 / 80

DIGITAL TEMPERATURE MONITOR – MASTERTEMP
18
Rev 1.1
Continuation.... MASTERTEMP CONFIGURATION MENU TRAFO
Submenu Parameter Variable Description
Hot Spot
Factor
Hot Spot ABNT
0 to 20 ºC
Configuration of the Hot-Spot factor that is summed to the
temperture gradiente according to standard NBR 5416 and
IEEE Std C 57.91-1995 in order to find the hottest point of the
winding.
If using standard IEC to the calculation, this parameter will be
adjusted to 0 (zero).
Hot Spot IEC
1.0 to 1.5
Configuration of the Hot-Spot factor that is multiplied by the
temperature gradiente according to the standard IEC 354 in
order to find the hottest point of the winding.
If using standard ABNT to the calculation, this parameter will
be adjusted to 0 (zero).
Cooling Type 2M 1.0 to 2.0
Configuration of the cooling type used on the transformer.
1,6 (natural and forced oil);
2.0 (directed oil);
Nominal
Current
Winding 1
Winding 2
Winding 3
0,001 a 9,999 KA
Configuration of the nominal current of the transformer in the
windings.

Winding 1 – nominal current at winding 1

Winding 2 – nominal current at winding 2

Winding 3 – nominal current at winding 3
Current
Relation
Winding 1
Winding 2
Winding 3
1 a 9.999
Configuration of the transformation ratio at the CTs of thermal
image of the monitored windings.
Example: CT of thermal image 950 / 5 A = CT ratio of 190.

Winding 1 – Transformation ratio of the thermal
image CT at winding 1

Winding 2 – Transformation ratio of the thermal
image CT at winding 2

Winding 3 – Transformation ratio of the thermal
image CT at winding 3