Manufacturer of FTL1 Outdoor Cable Branch Box for South Africa Factory
Exterior and dimensions
In the past few years, our company absorbed and digested advanced technologies both at home and abroad. Meanwhile, our company staffs a team of experts devoted to the development of Manufacturer of FTL1 Outdoor Cable Branch Box for South Africa Factory, welcomes all overseas friends and merchants to establish collaboration with us. We will provide you with honest, high quality and efficient service to meet your requirements.
FTL1 outdoor cable branch box is suitable in power supply system with AC 50HZ, rated working voltage( 0-380V), the current is not greater than 630A for the use of power distribution. It is widely used in various low-voltage cable branch of residential quarters, industrial and mining enterprises, with a flexible, practical, safe and reliable features. The spire-type lid is conducive to the discharge and the bottom of the lid with a vent hole which guarantee the box components will not be condensated. There are double fold on the door to prevent watering and installed with a new outdoor door which general staff can not open.
FTL1 Outdoor Cable Branch Box meet GB7251.5-1998 standard and passed the CCC certificate.
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Inventor of miniature circuit breaker.
The miniature circuit breaker was invented by Stotz-Kontakt, a company established in Mannheim, Germany, in 1891
application, although his commercial power distribution system used fuses. Its purpose was to protect lighting circuit wiring from accidental short circuits and overloads. Inside the MCB and its construction.
MCB means is miniature circuit breaker. it is commonly use in low voltage electrical network system instead of fuse. miniature circuit breaker is best if compared to the fuse. Its automatically switches off the electrical appliances during abnormal condition like over load or short circuit condition.
Working Principle of Miniature Circuit Breaker.
In MCB there are two type arrangement of operation. First is due to thermal effect of over current and second is electromagnetic effect of over current.
The thermal operation of MCB is achieved with a bimetallic strip when continuous over current flows through MCB the bimetallic strip is heated and deflects by bending just like in electric iron. deflection of bimetallic strip releases mechanical latch and operate the MCB mechanism to open the miniature circuit breaker contacts.
In case of short circuit condition current rise suddenly. it causes electromechanical displacement of plunger associated with tripping coil or solenoid of MCB. The plunger strikes the trip lever causing immediate release of latch mechanism consequently open the circuit breaker contacts.
There are three type of MCB, one is Type B, second is Type C and third is Type D.
• Type B trips between 3 and 5 time full load current and is generally used for lighting and domestic applications.
• Type C trips between 5 and 10 times full load current and is generally used for industrial and commercial applications.
• Type D trips between 10 and 20 times full load current and is generally used for specialist industrial use with high inrush currents.