What Does It Mean When Creepage Marks Appear On The Insulation Surface Of A Copper Terminal Block?

For installation environments of copper terminal block, especially in humid or dusty industrial locations, the creepage distance between copper distribution block and the tracking resistance of the insulation material are crucial. If the insulator surface is subjected to a high electric field and the material's CTI value is low, conductive paths may gradually form on the surface, causing current to extend along the outer edge of the insulation and leave traces on the surface. This is consistent with the mechanism of tracking.

The insulation of copper terminal strip is greatly affected by the external environment. Dust, moisture and slight dirt deposits can reduce the breakdown resistance of the insulation surface and cause surface tracking phenomenon.