Thermovision is an instrument for visualizing and detecting the temperature on an object in the catch and in the show to a display with infrared technology. to find out the temperature of the heat on the connection and the conductor, in order to get the value of the temperature difference between the temperature of the conductor against the connection, so it can detect the State of the switchyard on equipment under normal circumstances or not normal, as well as discussing methods the measurement value of emissivity emissivity value for gaining an accurate and well, that States that the value of the temperature measurement accuracy and has a good persision. The temperature is hot (hot point) at carrier substation equipment (switchyard), is a parameter on the monitor and in the analysis of changes at any time. It is closely related to the protection and the reliability of existing systems in the switchyard. The method in use i.e. searching for references to research, gather research data on the location, analysis and mathematical calculations. Temperature measurement results in the connection clamps take 20 sample temperature to emissivity value calculation to get the value of test method precision and accuracy using the method vaildasi. The results of the calculation of the temperature difference between the clamps towards the conductor in may 33 dial in good condition, 3 connection in condition when maintenance and inspection 1 connection in planning improvements to the condition of the test method emisitivy, get the value of precision 0.4% and 99.84% accuracy so that the method of calculation of the test in the test can be used
