Miniature Circuit Breakers, also referred to as MCBs, are electromechanical devices whose primary function is to safeguard an electrical circuit from the disastrous effects of an overcurrent.
In the ideal working conditions of a low voltage electrical circuit, a stable level of current passes through the network. When a default of any type takes place in this electrical network, it is common for a situation to unfold where the current crosses the rated limit. This unprecedented flow of current can result in long-lasting damage to the electrical equipment. To shield these appliances and the individuals using them from any major concerns this high-rated current needs to be dealt with as soon as possible. This is exactly where the performance of an MCB comes into play. This MCB identifies the irregular current flow and swiftly breaks the circuit. This can also be referred to as the tripping action of the MCB knob.
In previous times this operation was performed by a device called a fuse – however, MCBs now have replaced the fuse as the eminent popular safety appliance in the sphere of power management and distribution management system. There are several types of MCBs - single pole, 2-pole, 3-pole, and 4 pole MCB. Below explained are the key differences between a single-pole MCB and a 2-pole MCB.
Physical Differences -
A single pole MCB is thin in appearance and has a solitary switch through which it is operated. A 2 Pole MCB has double the width of a single-pole with the appearance of two switches, bridged to operate as a single switch.
As per the characteristics listed in the point above, double-pole breakers will also require twice the space in a breaker panel as their single-pole counterparts.
Electrical Differences -
Single and double-pole MCBs differ in terms of the number of connectors connected to the breaker, as well as the ampere and power ratings of the breakers.
Single-pole breakers offer 120 volts service while double-pole breakers offer 240 volts service.
Single-pole breakers are rated for 15-20 amps while double-pole breakers are rated for 20-60 amos.
Single-pole breakers connect with two wires - one hot and one neutral. Double-pole breakers have three connecting wires - two hot and one common neutral connection.
Applications -
Single-pole breakers are suitable for non-heating or low amperage household use. This includes-
Indoor lighting
Light appliances such as hair dryers, vacuums etc
Outdoor lighting
On the other hand, double-pole breakers are popular for the following functions -
Water heaters
Central Air Conditioners
Electric ranges
Electrical clothes dryers
To conclude – all the different MCBs have proven themselves to be electrically safe to operate. This is promoted through a unique interface, enhanced by the varied benefits of negligible maintenance requirements and economically feasible costs. With popular manufacturers such as #SchneiderElectric, there is a wide variety of safe and reliable options in the market today #LifeIsOn.
