0451010.MR

0451010.MR Application Field and Working Principle

0451010.MR is an heavy-duty hydraulic magnetic circuit breaker applied to system of AC 50/60Hz, rated insulation voltage 1000V, rated current 10A, for overload and short circuit protection under normal duty and infrequent line conversion can also be used to control and protect motor.

Application Field

• It can be widely applied in various fields such as manufacturing, architecture, petroleum, chemistry, medical treatment, etc.
• It can serve as protecting the circuit, equipment and workers against short circuit, overload, over voltage and under voltage in the circuits of 10A or lest

Working Principle

0451010.MR is designed with electromagnetic system powered by AC 50/60Hz. When the current used is too large, it will take action to rapidly switch off the power so as to ensure the safety of the circuit, equipment and workers.

Internal Structure of Magnetic Circuit Breaker

0451010.MR mainly consists of five components: case, operating mechanism, contact system, electromagnetic operating system and thermal-magnetic release.

• Case: It is a molding shell with high-temperature and high-pressure engineering plastic. It is fireproof and anti-erosion and features perfect sealing performance.
• Operating Mechanism: The manual switch is mounted inside a case made of fire-resistant plastic. When the switch is rotated clockwise, it can make contact, while rotating anti-clockwise can shut down the contact. It is of high accuracy and good anti-vibration performance. It can resist impacts, dropping, electric arc, burning and other destructions.
• Contact System: The contact bridge is made of copper and silver alloy, which is resistant to electric arc. The contact points are set in a state of insulation resulting in low electric resistance and long electrical life.
• Electromagnetic Operating System: It consists of solenoid, plunger, latch and operating coil. The solenoid is energized by the power supply and serves as the driving source for the default or shut-off operation.
• Thermal-magnetic Release: It is composed of thermal element with bimetallic strip and magnetic element. The thermal element is subjected to current, the bimetallic strip is heated and bent due to Joule’s heating effect. The switching off is accomplished by magnetic reed because of the combination of the magnetic field and thermal element.

Advantages of the Magnetic Circuit Breaker

• It has high breaking capacity and low power loss.
• It has flexible manual throwing operation and quick automatic breaking.
• The contact and coil have long working life and anti-drop electric arc performance.
• It is of high reliability and strong antishock ability.
• The components are made of special material and fireproof plated coating.

Limitations of the Magnetic Circuit Breaker

• It is not suitable for connections that are frequently used.
• Certain engineering installation is required, which can be complex.
• It needs to be frequently checked to ensure proper working.
• It is more expensive than other types of breakers.
• The contact is more likely to fail.