low-tension vs low-voltage

low-tension and low-voltage both are adjectives.

Word	Noun	Adjective	Verb	Adverb
low-tension	No	Yes	No	No
low-voltage	No	Yes	No	No

As adjectives, low-tension and low-voltage are synonyms defined as:

low-tension and low-voltage: subjected to or capable of operating under relative low voltage

low-tension (adjective)	low-voltage (adjective)
subjected to or capable of operating under relative low voltage	subjected to or capable of operating under relative low voltage