Over voltage protection device UZM-51MD

 The protection device arcs UZM-51MD (further - AFCI) is designed to detect arcing events (sparks) in the wiring, as well as to disable equipment with a decrease and increase in the single-phase AC voltage networks. Protects equipment connected to it (in an apartment, office, etc.) from the damaging action of pulsed power surges caused by triggering of closely spaced and connected to the same network of electric motors, magnetic starters, or electromagnets, thereby preventing the equipment damage and possible fire, followed by fire .
 The device represents a voltage control relay with a powerful electromagnetic relay at the output, supplemented varistor protection and combined with a protection device from the arc (AFCI). The unit case is made of ABS plastic, which does not support combustion (UL-94V0). The device is mounted on a DIN rail width 35 mm (GOST R MEC 60715-2003) with a front connecting wires power switched circuits. Terminals tunnel construction provides a reliable clip wires to the total cross section up to 35mm2.
 The front panel of UZM-51MD has two indicator two-color (green/red) "norm-accident" and the two-color (yellow/red) "relay-arc", manual override, knob adjustment of the upper and lower disconnection thresholds. Diagram, curcuit connection and the dimensions shown in the illustrations below.