Ano ang isang circuit breaker?

Ano ang circuit breaker?

Paglalarawan ng circuit breaker

Ang circuit breaker ay isang switch device na binubuo ng contact system, arc extinguishing system, operating mechanism, release device, housing, at iba pa, na maaaring mag-close, mag-carry, at mag-break ng current sa normal at abnormal na kondisyon upang maprotektahan ang circuit at equipment mula sa overload, short circuit, at iba pang mga pagkakamali.

Pangunahing istraktura

• Contact system

• Arc extinguishing system

• Operating mechanism

• Release device

• Shell

Pamamaraan ng paggana

Kapag may short circuit, ang magnetic field na ginawa ng malaking current (karaniwang 10 hanggang 12 beses) ay natalo ang reaction spring, ang release device ay nag-hila ng operating mechanism upang gumalaw, at ang switch ay agad na natrigger. Kapag overloaded, ang current ay naging mas malaki, ang init ay naging mas matindi, at ang bimetal sheet ay nabago ang hugis upang mapromote ang pag-act ng mechanism (ang mas malaking current, ang mas maikling oras ng pag-act).

Operasyonal na katangian

• Rated voltage

• Rated current

• Setting range ng trip current para sa overload protection

• Short circuit protection

• Rated short circuit breaking current

Klasipikasyon ng circuit breaker

Low-voltage circuit breaker : may manual na function ng switch, at maaaring awtomatikong gumawa ng voltage loss, undervoltage, overload, at short circuit protection ng electrical appliances, maaaring gamitin para sa distribution ng electrical energy, infrequently start asynchronous motors, ang power line at motor protection, kapag sobrang overload o short circuit at undervoltage failures maaaring awtomatikong putulin ang circuit.

High-voltage circuit breaker : ang rated voltage ng 3kV at higit pa ay pangunahing ginagamit para punitin at mag-close ng electrical circuit.

Pagsambit ng circuit breaker

• Wiring mode behind the board

• Plug-in connection mode

• Drawer type wiring mode

Pamantayan ng paggana

• Temperature : upper ambient air temperature +40℃;  Lower limit of ambient air temperature -5℃; The average ambient air temperature for 24h does not exceed +35℃.

• Elevation : The elevation of the installation site does not exceed 2000m.

• Atmospheric conditions : the relative humidity of the atmosphere does not exceed 50% when the ambient air temperature is +40℃; It can have higher relative humidity at lower bottom temperature. The monthly average maximum relative humidity of the wettest month is 90%, while the monthly average minimum temperature of the month is +25 ° C, taking into account the condensation that occurs on the surface of the product due to temperature changes.

• Pollution level : The pollution level is 3.

Direction ng pag-unlad

• Bulk

• Intelligentize

• Miniaturization