Crest Value

The maximum value of a wave form. This is normally associated with electrical fault magnitude or transients.

Creepage Distance

The shortest distance between two conductors as measured along the device that separates them. Creepage Distance is normally a design parameter of insulators or insulating bushings.

C-Rate

Battery discharge current in amperes; numerically equal to rated capacity of a cell in ampere-hours.

CPE

Chlorinated Polyethylene. CPE is a thermoplastic compound that is used to jacket certain types of power cable.

Counting Relay

A relay that counts the number of times it is energized and actuates an output after a desired count has been reached.