Plastic STMB MCCB Circuit Breaker , Motor protection molded circuit breaker

Specifications

Relative humidity of the atmosphere in the surrounding air temperature of +40ºC is less than 50%; the relative humidity at the lower temperature can be high; most of the wet month average maximum relative humidity of 90%, the monthly average minimum temperature of +25ºC and considering the temperature due to changes in product surface.
Pollution grade: grade 3.

Molded case circuit breakers can have very high current ratings, which allows them to be used in heavy duty applications. The following are some typical uses of an MCCB:

• Main electric feeder protection – The electric feeder circuits that supply power to large distribution boards normally have very high currents, of hundreds of amperes. In addition, if more circuits are added to the system in the future, it may be necessary to adjust the circuit breaker trip settings. Therefore, a molded-case circuit breaker is required.
• Capacitor bank protection – Capacitor banks are a very important component of commercial and industrial electrical systems, since they allow power factor correction – reducing line currents and preventing fees from the electric utility company. Large capacitor banks may draw high currents and will require MCCB protection.
• Generator protection – Large electrical generators may provide an output of hundreds of amperes. In addition, gen-sets are normally very expensive. The high current ratings of molded case circuit breakers allow them to provide reliable protection in this application.
• Welding applications – Some welding machines may draw very high currents that exceed the capabilities of miniature circuit breakers, requiring the use of an MCCB.
• Low current applications that require adjustable trip settings – MCCBs are not only for high current applications. There are models rated below 100 amperes for when low current equipment requires the adjustable trip settings provided by MCCBs.
• Motor protection – The reliable protection capabilities of MCCBs make them an adequate choice for motor protection. A molded case circuit breaker can be adjusted to provide overload protection without tripping during the inrush current of an electric motor.

Our Services:

1. Competitive price
2. Continuance Service and support
3. Good-after service
4. Quality Reliability and Long Product Life.

WENZHOU SANTUO ELECTRICAL Co., Ltd.(Before:YUEQING SHANTUO ELECTRICAL CO.,LTD.) is one of manufactories that specialize in manufacturing Circuit Breaker, AC CONTACTOR, Thermall Relay,Magnetic Starter(DOL),Solid State Relay,Distribution Case, Voltage Regulator  is located in Liushi, Wenzhou, China that called " the Capital of Low Voltage Electronic Products", enjoying convenient transportation access and a beautiful environment. The products have passed CE approvals and strictly comply with IEC standards. The company has advanced detection instruments and strong technical force with strong research and development capability, product constantly updated. The products export Europe, Asia, Southern Amercia, Middle East, Western Africa market.The products have passed CE certificate. And our Teams have more than 20years Experience. 

If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.

On the base of guarrantee the quality, we will try our best to design new model with ourselves patents for the coming years.