AB-3S Outdoor permanent magnet vacuum circuit breaker

•product overview of China AB 3S outdoor permanent magnet vacuum circuit breaker:

Model AB-3S -40.5 permanent magnet type vacuum circuit breaker adopted the peculiar permanentmagnet mechanism and high reliable intelligent controller.This China AB 3S outdoor permanent magnet vacuum circuit breaker mainly operating in medium voltage overhead line, used to open or close loadingcurrent, overloading current, and short circuit current, moreover it can perform 0 ~ 3 cycles of reclosingoperations.

•Product advantage:

extremely high reliability

Free of maintenance during its servicing life

long mechanical life and electrical endurance

Small size, lightweight, easy to be installed

With standard relay protection and fast automatic reclosing function

           

•Conditions of use:

Ambient temperature: -30℃~ +60℃

Altitude: not exceed 2000M

Max wind speed 34M/S

The vibration resulted from switchgear or controlgear, or other normal cases can be omitted

Pollution grade: IV

Storage Temperature -40℃ +85℃

•The basic structure and principle of vacuum circuit breaker 

AB-3S-40.5 vacuum circuit breaker mainly consists of the embedded poles, current transformer,permanent magnet actuator and case

This China AB 3S outdoor permanent magnet vacuum circuit breaker  is of minimized type, and equipped with the emergent OPEN device of manuallyoperated type

CTs are optional as required by the users

The control function for BZW-33M breaker is performed by the intelligent control unit

The breaker can be closed or opened locally, or remotely through its communication port

The other information of the breaker can be transmitted to the control center through thesignaling passage that may be cable, optical fiber, GPRS/CDMA, GSM and so on

The intelligent China AB 3S outdoor permanent magnet vacuum circuit breaker controller installation closing to Vacuum circuit breaker

 It uses cable to connect between controller and breaker

 The power source for the inelligent break controller has mains power supply and the standbypower, the mains power supply is AC or DC 220V, it come from the PT in high-   tension line.

Battery provides the standby power source (installed in the controller box)

When main power supply for the controller, meanwhile it will charge the standby power source

In case that main power source is failed, standby power source will replace to operate and takeeffect not less than 48hours at full load

BZW-33M has emergency manual opening handle, China AB 3S outdoor permanent magnet vacuum circuit breaker can be use for emergency switching-off whenthe intelligent controller or power source is failed

     

•The principle of arcing 

China AB 3S outdoor permanent magnet vacuum circuit breaker adopted vacuum interrupter,extinguish the arc and insulate by use of vacuum chamber, high vacuum degree. When the electrifiedmoving and static contacts are opened by operating mechanism, there will produce vacuum arcbetween contacts, meanwhile due to the special figure of the contacts, it will have longitudinalmagnetic field in the gap of contacts, make the arc to be diffused, electric arc will burn evenly on thesurface of contacts, remain low arcing voltage, while current value pass through zero, the residual ions,electrons, and steamed metal particles will recover or condense on the surface of contact and shieldedcover within several ms, insulation strength will recover quickly, namely electric arc is quenched andbreaker is opened. Because vacuum arc controlled by longitudinal magnetic field, consequently thisvacuum circuit breaker has high and steady breaking capacity.

•Charging energy 

The energy for controlling AB-3S-40.5 permanent magnet type vacuum circuit breaker is stored in highperformance capacitor which installed in the itelligent controller box. When to open or close the breaker,the capacitor release the energy immediately, and charge the capacitor through main power source orstandby power supply, charging time not more than 10s, capacitor voltage tolerance ≤1V

•Closing operation 

Push the CLOSE button on the controller box, or through remote closing operation, electrify the closingcoil of operating mechanism, the iron core will drive the contacts of breaker to move at specified speed.After the breaker is in ON position, control circuit will switch off power supply of closing coil, at thisstatus, the iron core will be picked up by permanent magnet and remained in the side of breakerCLOSED. After closing coil is out of power supply, it can eliminate the reaction force resulted fromcontacts of the breaker, make breaker reliably remained in ON position.

•opening operation 

Push the OPEN button on the controller box, or through remote opening operation, electrify theopening coil of operating mechanism, produce further larger than the absorption force of permanentmagnet, to drive the contacts of breaker to move at specified speed. After the breaker is in OFFposition, control circuit will switch off power supply of opening coil, at this status, the iron core will beremained in the side of breaker OPENED due to opening spring, make breaker reliably remained in OFFposition.

•Manual opening handle operation for emergency use

When the China AB 3S outdoor permanent magnet vacuum circuit breaker in ON position, use the insulation rod to hook the operating eye of operating handle,and pull down, the breaker will be opened at some speed, to ensure the breaker can be break loadingcurrent reliably.

•mainly technical parameters

                                                                                                                                                         

 

•Mainly data of operating mechanism of China AB 3S outdoor permanent magnet vacuum circuit breaker