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Miniature Circuit Breakers (MCB)

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MCB - Miniature Circuit Breaker

MCBs or Miniature Circuit Breakers are electro - mechanical devices which protect an electrical circuit from an over current. The over current, in an electrical circuit, may be a result of short circuit, overload or faulty design. An MCB is a better alternative to a fuse since it does not require replacement once an overload is detected. Unlike fuse, an MCB can be easily reset and thus offers improved operational safety and greater convenience without incurring large operating cost. There are two basic arrangements of operation of miniature circuit breaker. One due to thermal effect of over current and other due to electromagnetic effect of over current. The principal of operation is simple. An MCB functions by interrupting the continuity of electrical flow through the circuit once a fault is detected. In simple terms MCB is a switch which automatically turns off when the current flowing through it passes the maximum allowable limit. Generally MCB are designed to protect against over current and over temperature faults.

Different types of Circuit Breakers

There are various types of circuit breakers that are in use these days like ACB which are rated current up to 10,000 A. They are usually electronically controlled where as some models are microprocessor controlled. A residual current device (RCD), or RCCB , Residual Current Circuit Breaker is an electrical wiring device that disconnects a circuit whenever it detects that the electric current is not balanced between the phase conductor and the neutral conductor. Such an imbalance is sometimes caused by current leakage through the body of a person who is grounded and accidentally touching the energized part of the circuit. Then there are Molded Case Circuit Breakers which provide protection by combining a temperature sensitive device with a current sensitive electromagnetic device. Both these devices act mechanically on the trip mechanism. The traditional molded-case circuit breaker uses electro mechanical or thermal magnetic trip units that may be fixed or interchangeable.

Widest variety of Industrial Products

On Tolexo, you can buy MCCB online from brands like, Havells, L&T, Bajaj, Schneider and many more at the best prices. Apart from these, Tolexo deals in 28 wide categories of products and over a million products which also includes, industrial products , safety gloves, screwdrivers, hand tools, power tools, machine supply, machine tools, lock nut, electricals, plumbing tools, coach bolts, fans, safety gloves, screwdrivers, hand tools, power tools, philips plug, screwdriver bits, test and measure tools, hardware, office supplies, extension cords, fasteners, lubricants, lab supplies, indexable inserts, havells socket, pullers, pliers, power drills, garden tools, LED Lights, adhesives, abrasives, medical supplies, lag bolts, screwdriver bits, test and measure tools, hardware, office supplies, fasteners, washers, screw drivers, hand tools, screw online ,Safety Products etc. Now you can buy nuts sitting at home, saving your money, time and energy and with a 100% guarantee of genuine products. Moreover, we assure you with a timely dispatch of your order. In case of dissatisfaction because of defect, 15-day money back guarantee. Where else would you get maximum surety at minimum prices!