Product Details
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.
ed of current of release(A) | Thermodynamic release (ambient temp+40ºC | Operational current of magnetic release(A) |
1.05In(cold state) inoperative time(h) | 1.30In(heat state) inoperative time(h) |
In≤63 | ≥1 | <1 | 10-50In ±20% |
63<In≤250 | ≥2 | <2 | 10In ±20% |
25<In≤800 | ≥2 | <2 | 5-10In ±20% |
Our Services:
- Competitive price
- Continuance Service and support
- Good-after service
- Quality Reliability and Long Product Life.
Company Profile
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.