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Voltage Ratings

Camesa cables are conservatively rated with respect to the voltage the cable will withstand being applied across its insulation.

Camesa cables are rated at DC rather than AC.  Rating a cable for maximum AC voltage presents difficulties.  AC voltage ratings are dependent on frequency and wave shape.  Usually an AC voltage that varies in time is characterized by what equivalent DC voltage can be used to provide the same amount of heating a resistor.

In many applications, AC power is transmitted as alternating voltages and currents in a sine or cosine wave variation in time. Also, 60 HZ is a common power frequency.  If this is the method of transmission, then a 707-volt sine wave has 1000 volts peak voltage.  Thus 707 average voltage at a frequency of 60 Hz would correspond to 1000 Volts DC.

At higher frequencies there can be more stress on the dielectric due to heating.  Generally, the higher the frequency, the lower the breakdown voltage.

Also, for different wave shapes such as square waves rather than sine waves, the peak and average values are the same, rather than in the ratio of 1:707 as is the case with a sine or cosine waveform.

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