Pressure quick how should be resistor chosen, the coil that communicates contactor two end are pressed with what quick resistor, holding to the principle that serves for broad user, everybody comes below press below popular science quick how is resistor chosen after all.

 

Above all we will next what understand is to press quick resistor: It is one kind is had nonlinear the resistor parts of an apparatus of volt-ampere character, voltage clamp undertakes when basically be being used at bearing to press in circuit, absorb redundant electric current in order to protect sensitive parts of an apparatus, have nonlinear character is good, shed a capacity big, normal divulges electric current small, noise of low, movement should mix residual voltage level quickly to wait for a characteristic without follow on current, apply extensively at power source system, surge is restrained implement, how to defend a system, electromotor protection, car electron system, electric home appliances<gj.

 

 

The coil that why communicates contactor do two upright paralell connection press quick resistor? Should make the contact of contactor is sucked close, there must be enough electricity in its coil. When contactor cuts off the power, feel oneself with respect to meeting generation electromotive force, because coil cuts off the power for an instant, voltaic change rate is very old, feel oneself so electromotive force is very large also. Meeting puncture exceeds instantaneous high pressure the electronic parts of compression, the compression that exceeds contactor coil itself even makes coil damages. Of component of the electron in thinking to protect line, absorb coil to lose the voltaic impact of electric instant, raise power factor, two upright paralell connection press the coil that should communicating contactor quick resistor.

 

Pressure quick the character of resistor is press in its report of two end under some numerical value when, it scarcely electric, be equivalent to open circuit; And after exceeding some numerical value when the voltage on its, it by puncture, be equivalent to short circuit almost. So we choose to press quick the electric current that the secure job electric current of resistor wants to be more than coil, such pressing quick resistor is in open circuit position can regain after cutting off the power. The choice is pressed quick the electrify voltage that the puncture voltage of resistor wants to be more than coil, can avoid to press quick resistor is online encircle normal electrify from time to tome electric current.

 

So PLC output of the client receives AC220V communication contactor, need is in pressure quick the series connection in the circuitry before resistor a fuse, press too when circuit so when, press quick report nick to wear, cause fuse fusing. Should choose at that time pressure quick resistor is 430V~470V. And when if be,be being used, should receive online road and earth to be in between, also want likewise from series connection a fuse. When be struck by lightning, the voltage of voltage outclass circuitry of thunder, press more than quick the threshold value of resistor, pressure quick resistor guides, to earth discharge, avoid the electric equipment in attaint circuitry. Right now, pressure quick resistor chooses 470V~510V.