Positronic relay

Positronic relay was technology on board Starfleet vessels in the 24th century, used to power some parts of a ship. It was also used in Soong-type androids.

Sometime in the 2350s, Kathryn Janeway knocked out power to six decks on the USS Al-Batani by mis-aligning the positronic relays on that ship. She later told the story to her first officer on the USS Voyager, Commander Chakotay. 

In 2371, Data experienced an overload in his positronic relay while on the Amargosa observatory due to his emotion chip being recently installed.