He had found Lieutenant Tyler working alone to replace some kind of power coupling.

The power coupling hadn't been quite in place, that was all.

There wasn't so much as an uneven flicker in the power couplings.

The short caused a power spike large enough to knock out the main power couplings.

He needed a few new power couplings for the replicators on the Denorios.

Sisko took a few steps closer, clutching the four power couplings.

"The last thing anyone needs right now is my ignorance of engineering to result in a severed power coupling."

Siregar grunted, then returned her attention to the exposed power coupling she had been working on.

But we took several power couplings off-line for standard maintenance.

That last surge knocked out the power couplings to the thrusters.