MCB is an abbreviation for Miniature Circuit Breaker. These circuit breakers perform the vital role of breaking the circuit to prevent damage from excessive current due to short circuit or overload.
When a short circuit occurs, a large amount of current begins to flow causing the MCB to trip almost immediately. In the event of an overload, it takes a few seconds to trip and interrupt the circuit.
Overloading and short circuits in the power supply can be dangerous for both people and equipment. To minimize these risks, MCBs are installed.
Pressfit’s SFT1 MCBs come with current ratings from 6A to 63A and high short circuit breaking capacity of 10kA. SFT1 circuit breakers adhere to the IS/IEC 60898-1 norms and are perfect fit for your heavy electrical appliances.
SP MCB
SPN MCB
DP MCB
TP MCB
TPN MCB
FP MCB
Exceptional Features
IP20 Class Protection
Pressfit's SFT1-MCBs are equipped with IP20 protection. It describes the ingress protection against solid objects of up to 12 mm, e.g. person’s fingers. This helps to avoid direct contact with the internal parts of the MCB, which could result in electric shock.
Mid-Trip Indication
It has a built-in mid-trip function that indicates whether the MCB is switched-off or tripped due to a circuit fault. This makes it easy to recognize a circuit fault as the knob stays in the center in case of overloading or short circuit.
High Breaking Capacity
A high short circuit breaking capacity makes SFT1 MCBs perfect for heavy electrical applications. They are competent to protect the electrical devices by breaking the circuit, even if the current is up to 10 kA.
Energy Efficient
SFT1 circuit breakers comply with IS / IEC 60898-1 standards and offer lower power dissipation compared to IS / IEC benchmarks. Less power outage makes it energy efficient and saves money by lowering your electricity bills.
High-Speed Breaking Mechanism
SFT1-MCB has a high-speed breaking mechanism which employs electrodynamic forces generated by the strong current due to a short circuit. The contacts get separated much faster before they can peak, which suppresses the high current.
Better Air Circulation
When two or more poles are placed side by side, the breathing channels are contoured to allow air to circulate around each pole, resulting in cooler operation.
Application
MCBs are more sensitive to current than a fuse. As soon as they discover anomalies, they immediately trip and interrupt the circuit. They can also be reset after tripping, which is a huge advantage over fuses. It is one of the main reasons why we are using mcb over a fuse today.
Air conditioning compressors turn on and off frequently, which increases the overall load. This is ultimately not good for the health of your entire electrical system as it can lead to arcing and, consequently, an electrical fire. To avoid such situations, mcb is used in conjunction with voltage stabilizers. They serve as a protective circuit against short circuits and overload. Likewise, mcbs are used in conjunction with other high load devices such as geyser, motor, etc.
Although the main function of the MCB is to protect lighting circuits, they are also widely used as local control switches. They can be used conveniently to turn on and off large groups of lights in shops and factories. Pressfit's SFT1 MCBs are well capable of carrying out this additional task safely and effectively.