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The tracking test (electrical tracking index test) is a simulated laboratory procedure specified in standards such as IEC 60112, UL 746A, GB/T 4207, GB 4706.1, and ASTM D 3638‑92. In this test, a conductive liquid (0.1% NH₄Cl) of a prescribed drop volume is applied at a fixed voltage, for a set duration (30 s), and at a defined height (35 mm) between platinum electrodes of specified dimensions (2 mm × 5 mm) on the surface of solid insulating materials. The test evaluates the resistance of solid insulating materials to electrical tracking under the combined effects of an electric field and a moist or contaminated environment, determining their comparative tracking index (CTI) and proof tracking index (PTI). This method is applicable to research, production, and quality‑control departments in sectors such as lighting equipment, low‑voltage electrical appliances, household appliances, machine‑tool electrical devices, electric motors, power tools, electronic instruments, electrical measuring instruments, and information‑technology equipment. It is also suitable for industries dealing with insulating materials, engineering plastics, electrical connectors, and related components.
Product Overview: Used to determine the burst strength of various cardboard types, including single‑layer and multi‑layer corrugated board, as well as non‑paper materials such as silk and cotton fabric.
