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{"title":"Plastic STMB MCCB Circuit Breaker , Motor Protection Molded Circuit Breaker","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/50\/49\/421caad76c69ad58a8c3fc87fd3e-200x200-1\/plastic_stmb_mccb_circuit_breaker_2c_motor_protection_molded_circuit_breaker.jpg","attrs":{"Brand Name":"SONTUNE","Model Number":"STMB1-100","Certification":"CE","Place of Origin":"China"}}
{"title":"3P 4P Thermal Magnetic Molded Case Circuit Breaker With Overload Protection","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/5a\/34\/2e8aa91f84aac111571e28850885-200x200-1\/3p_4p_thermal_magnetic_molded_case_circuit_breaker_c2_a0with_overload_protection.jpg","attrs":{"Brand Name":"SONTUNE","Model Number":"STN2","Certification":"CE","Place of Origin":"China"}}
{"title":"8kA Three and Four Pole Mould Case MCCB Circuit Breaker CE Passed Mini Circuit","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/4c\/6d\/a769d9e6f96d45b89e64a83a30e0-200x200-1\/8ka_three_and_four_pole_mould_case_mccb_circuit_breaker_ce_passed_mini_circuit_breaker.jpg","attrs":{"Brand Name":"SONTUOEC","Model Number":"STN3","Certification":"CE","Place of Origin":"China"}}
{"title":"65kA 4 Pole Reliable Mccb Molded Case Circuit Breaker For High Power Application","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/e3\/b2\/8db4f1b6fe9f936b3c59bc6eee17-200x200-1\/65ka_4_pole_reliable_mccb_molded_case_circuit_breaker_for_high_power_applications.jpg","attrs":{"Brand Name":"SONTUOEC","Model Number":"STM1","Certification":"CE","Place of Origin":"China"}}
{"title":"CE Certified 3P 100A MCCB Circuit Breaker , Mccb Switch With Normal Structure","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/50\/c2\/929ed51a795bc1327039ba3c4754-200x200-1\/ce_certified_3p_100a_mccb_circuit_breaker_2c_mccb_switch_with_normal_structure.jpg","attrs":{"Brand Name":"SONTUOEC","Model Number":"STMB1-100","Certification":"CE","Place of Origin":"China"}}
{"title":"STM Moulded Case MCCB Circuit Breaker , Small High Voltage Protection ,25~100kA","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/ad\/12\/82d53da1939ba5fab13acb0352c8-200x200-1\/stm_moulded_case_mccb_circuit_breaker_c2_a0_2c_small_high_voltage_protection_2c25_7e100ka_breaking_capacity.jpg","attrs":{"Brand Name":"SONTUNE","Model Number":"STM1","Certification":"CE","Place of Origin":"China"}}
{"title":"High Breaking Capacity MCCB Circuit Breaker 3P \/ 4P AC 400V Coil Voltage","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/af\/62\/826257e2c865f1c4c77ecb8b8689-200x200-1\/high_breaking_capacity_mccb_circuit_breaker_3p_2f_4p_ac_400v_coil_voltage.jpg","attrs":{"Brand Name":"SONTUNE","Model Number":"STS3","Certification":"CE","Place of Origin":"China"}}
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 Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2005
Total Annual:
350-500
Employee Number:
50~100
Ecer Certification：
Site Member
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... 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...
