ASTM D3638: Comparative Tracking Index Testing Services
The ASTM D3638 test method is used to determine the comparative tracking index (CTI) of electrical insulating materials in the presence of aqueous contaminants. This test provides a comparison of the performance of insulating materials under wet and contaminated conditions.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
What Is ASTM D3638 Comparative Tracking Index?
Applications and Benefits of ASTM D3638 Comparative Tracking Index Testing
Our ASTM D3638 Testing Procedure
Equipment and Instrumentation Used for ASTM D3638 Testing
What You Receive: Test Report, Data, and Certification
ASTM D3638 Comparative Tracking Index FAQs
It is a method for assessing the Comparative Tracking Index (CTI) of electrical insulating materials under wet, contaminated surfaces.
CTI measures a material’s ability to resist surface tracking from electrical stress and contamination.
It helps evaluate insulating materials' suitability for electrical applications and ensures compliance with safety standards.
A higher CTI value indicates better resistance to tracking and suitability for high-voltage applications.
Tracking occurs due to electrical discharges on the material's surface in the presence of contaminants like water or dirt.
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