Photo 1. This type of submersible pump control box contains a capacitor, relay, and associated electronics. In this article, we'll take a look at the 3-wire 240V single-phase submersible pump system ...

For the second time in 2 months, the agency has warned of a potential problem with the controllers, with one related death.

Clad in bulky spacesuits, NASA astronauts Chris Cassidy and Tom Marshburn replaced a pump control box thought to be responsible for the leak of ammonia, which cools down the orbiting lab's systems.

There's a pump problem on the International Space Station. On Wednesday, the pump module on one of the space station's two external cooling loops automatically shut down.