The Schneider Electric TeSys B CV1BL2L0ZM522 is a 2-pole contactor rated for 1000 A in AC-3 duty at 690 V, with a 220 V AC 50 Hz coil. That AC-3 rating means it's built for switching squirrel-cage motors — making and breaking currents up to that full-load figure, not just carrying them. The AC-1 rating covers resistive loads like heating and lighting, where the switching arc is less aggressive.
This contactor mounts on a panel plate or DIN rail, switching the main power feed to a motor or resistive heater bank. The 2 NO main poles switch both lines on a single-phase or DC circuit, or two phases of a three-phase system. The 2 NO + 2 NC auxiliary contacts provide feedback for a PLC or holding circuit without a separate block.