Application of switch of double power source is very wide, we look simply how to use relay, contactor realizes automatic switch.

 

 

Two contactor realize switch

 

Reserve the coil of power source goes advocate of contactor often close a point, advocate power source contactor is sucked add up to main circuit to guide. Advocate power source cuts off the power, reserve power source is passed advocate of contactor often shut a dot to guide. If advocate power source returns to normal, reserve power source disconnects.

 

Also can come true of course with lock of contactor each other, it is a bit more troublesome, and advocate power source and reserve how to when power source has report at the same time, do? Accept ordinal job even so the sort of, not necessary so troublesome, the method is not only.

 

 

A relay two contactor

 

Advocate the contactor coil of power source walks along relay often open contact, reserve the contactor coil of power source walks along relay often close contact.

 

When masterstroke road has report, relay is sucked close, often open contact to close, masterstroke road guides. Often shut contact to disconnect, reserve power source does not work. When masterstroke road cuts off the power, relay also cuts off the power. Often open contact to restore initiative disconnect condition, masterstroke road disconnects. Reserve the contactor of circuit connects those who cross relay to often shut contact to begin the work.

 

 

Relay of double changeover contact

 

This is mixed above similar, just this relay is double changeover contact, when electrify, two groups of contact close. Two groups of contact when cutting off the power close. Component of an electric equipment can be finished. If A road is single-phase power source of 220 bend over, the coil voltage of relay also chooses those who communicate 220 bend over.

 

Contactor and relay are being connected there is time to differ when cutting off the power, very high to using report to ask equipment or electric equipment can have ephemeral reaction. For instance bulb twinkled apparently, electric machinery halt. If be to lock up circuit oneself, you can discover the equipment that use phone did not work.

 

 

Transfer switch of double power source

 

This cost is a bit high, need hand is moved. If start work the friend with strong capability, completely OK oneself start work assemble circuit of a control.

 

Power source changeover has brief time difference for certain, do not have impossibly that intermediate uninterrupted report is achieved seam join.

 

 

Of class of PC of diverter switch of double power source and CB class divisional:

 

Diverter switch of double power source divides PC class and CB level, both structure is roughly same. PC class is segregation model, resemble the double switch that drop a knife, add operation orgnaization to form.

 

CB class is breaker protection, add manipulator compose to comprise by two breaker, have protection of overload short circuit, with breaker protection. The user should consider when the choice from the following respects.

 

(1) consider from dependability angle.

 

The reliability of the class comparing CB of PC class is a few higher, what PC class uses is mechanical + the electron changes behavioral lock, what CB class uses is lock of electronic changeover movement. Ask in a few security more expensive work produces place so, the proposal selects PC form product.

 

(2) consider from switch time angle.

 

Time of switch of two kinds of products is different, PC form product is used on decelerate electric machinery more general, because electric machinery rotate speed is high (16-22r /min) , after circuit malfunctions, need to wait for decelerate of electric machinery rotate speed to spark to certain level ability of switch movement orgnaization disconnects, behavioral time is slower, although switch time is slow, but as mechanical product more still consider from durable sex angle.

 

CB form product is commonly used in dweller building, it is easy that breakdown power source disconnects, switch time is fast.

 

(3) diverter switch of PC class double power source protects a function without short circuit, the user is additional increase breaker to whether should need to consider according to circuit system.

 

Diverter switch of double power source its action is action of changeover of implementation two-way power source, have protect a function to won’t run an influence to it without short circuit. A lot of people think short circuit function is to use protective switch, this is wrong understanding error.

 

(4) add install switch-disconnector, can take up space, raise cost, reduce reliability, the proposal is industrial the switch-disconnector in electric system needs to control installation amount, necessary setting switch-disconnector is done not have in dweller floor.