The Comparative Tracking Index (CTI) is used to measure the electrical breakdown (tracking) properties of an insulating material. Tracking is an electrical breakdown on the surface of an insulating material wherein an initial exposure to electrical arcing heat carbonizes the material.

CTI: The Comparative Tracking Index Test ds 50 drops of contaminated water without tracking. Tracking is defined as the formation of conductive paths du hort”) in equipment using insulating materials. This test also provides a means to compare insulating materials

This method is used to assess the relative resistance of insulating materials to tracking.

2023年10月5日 · As high voltages are applied to an isolator, electric discharges close to the surface of the package can cause tracking of the mold compound. This deterioration creates a conductive path across the isolator and is often referred to as tracking.

2022年2月2日 · This method is an accelerated test which at relatively low test voltages, provides a comparison of the performance of insulating materials under wet and contaminated conditions. The comparative tracking index is not related directly to the suitable operating voltage in service.

The formation of an electric arc between two bare conductors can occur through a current path that develops on the surface of the insulating material. This path is referred to as a "tracking". Some insulating materials characterized by a low "surface resistance" are more prone than others to manifest this phenomenon.

CTI is short for Comparative Tracking Index, means the maximum voltage measured in volts to verify the electrical breakdown properties of an insulating material that used in the electronic devices.

The numerical value of the voltage which causes failure with the application of 50 drops of the electrolyte is arbitrarily called the comparative tracking index. This value provides an indi- cation of the relative track resistance of the material. 5.

6 天之前 · Comparative Tracking Index (CTI) is the extent to which the insulating material of the PCB can resist the unwanted current to flow between traces on the board. It is a measure of the ability of the PCB substrate to withstand any breakdown between two tracks on the PCB surface.

2021年4月15日 · A tracking test is to verify the comparative tracking index (CTI) and proof tracking index (PTI) of the solid insulating materials or the solid insulating materials on the selected components, so as to determine the appropriate insulation distance between conductors on solid insulating materials.