Insulator (electricity)

Ceramic insulator used on railways electrified with 25kV AC overhead electrical catenary

3-core copper wire power cable, each core with individual colour-coded insulating sheaths all contained within an outer protective sheath

PVC-sheathed Mineral insulated copper cable with 2 conducting cores

Power lines with ceramic insulators in California, USA

An electrical insulator is a material whose internal electric charges do not flow freely, and therefore make it nearly impossible to conduct an electric current under the influence of an electric field. This contrasts with other materials, semiconductors and conductors, which conduct electric current more easily. The property that distinguishes an insulator is its resistivity; insulators have higher resistivity than semiconductors or conductors.

单词	Creepage distance
释义	Creepage distance 英语百科 Insulator (electricity) An electrical insulator is a material whose internal electric charges do not flow freely, and therefore make it nearly impossible to conduct an electric current under the influence of an electric field. This contrasts with other materials, semiconductors and conductors, which conduct electric current more easily. The property that distinguishes an insulator is its resistivity; insulators have higher resistivity than semiconductors or conductors.
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Creepage distance

Insulator (electricity)