Contactor DC loop non-reversing DB 180A

The contactors feature a top-wired design with all power connections at the top of the contactor. Contacts-the double break silver cadmium oxide contacts are weld resistant for improved reliability. Movable contacts are wedge shaped, while the stationary contacts have a unique fold back design. On contact opening, this fold back design generates a strong magnetic field which quickly throws the arc off the contact surface. The arc is then cooled and extinguished by the surface of the arc chamber. Coil-the contactor coils are hot pressure molded in thermo set epoxy to protect against mechanical damage and harmful environments. The coil shunt plate is designed to retard the magnetic flux until the voltage applied reaches the pick up voltage. Each coil is provided with an exclusive thermal cut-out which is designed to open on excessive currents or misapplied voltages. Magnet-the high efficiency magnet has a permanent air gap. Pole face wear cannot affect the air gap and cause magnetic sticking due to residual magnetism. Each magnet lamination is phosphate coated to provide ample resistance to corrosion.