Kinetic screen

Kinetic screens use the manipulation of gravitational fields to deflect incoming projectiles, such as those from railguns, as well as incoming torpedoes. Essentially, projectors maintain a wall of repulsive gravity. This wall prevents anything from hitting the ship.

This wall is kept up by one or more dedicated generators, as more and more material impacts the screen the generator is subjected to more and more stress. Eventually emergency safety systems disengage the screen to prevent the generator from overloading. Overriding these safety systems would keep the screens up for slightly longer, but eventually the generator would overload and cause massive internal damage to the ship.