https://en.wikipedia.org/wiki/T-14_Armata
The tank features the Afghanit (Russian: Афганит) active protection system (APS),[53] which includes a millimeter-wave radar to detect, track, and intercept incoming anti-tank munitions, both kinetic energy penetrators and tandem-charges.[2][54] Currently, the maximum speed of the interceptable target is 1,700 m/s (Mach 5.0), with projected future increases of up to 3,000 m/s (Mach 8.8).[19] According to news sources, it protects the tank from all sides,[27] however it is not geared towards shooting upwards to defend against top-attack munitions.[55][56]
Defense Update released an analysis of the tank in May 2015, speculating that Afghanit's main sensors are the four panels mounted on the turret's sides, which are probably AESA radar panes spread out for a 360° view, with possibly one more on top of the turret. In their opinion, the active part of the system consists of both a hard kill and soft kill element, the first of which actively destroys an incoming projectile (such as an unguided rocket or artillery shell), while the second confuses the guidance systems of ATGMs, causing them to lose target lock. They believe that it would be effective against 3rd and 4th generation ATGMs, including Hellfire, TOW, BILL, Javelin, Spike, Brimstone, and JAGM, as well as sensor-fused weapons (SFW).[57] Some Russian sources claim the hard-kill APS is effective even against depleted uranium-cored armor-piercing fin-stabilized discarding sabot (APFSDS) rounds traveling at 1.5–2 km/s (0.93–1.24 mi/s), but others are skeptical, saying the fragmentation charge would not do much to the dense penetrator; while it might be able to push it off course somewhat with a hit-to-kill approach, it likely will not do much to stop it.[58] Practical tests confirmed the destruction of the uranium subcalibration projectile (goal speed up to 2 km / s).[59]