During short circuits, the electricity trips with a jolt that might cause severe damage to your electrical devices. Overheating can disrupt whole manufacturing units in industrial and commercial premises and cost the companies productivity and monetary terms. Hence, to overcome such calamities, the system designers and electrical engineers use MCCB electrical protection devices to safeguard the electric circuit from excessive current.
Keep reading to learn about MCCB and understand its mechanism and application in the residential, commercial, and industrial premises.
What Is MCCB?
MCCB, an acronym for Moulded Case Circuit Breaker, is a kind of electrical protection device. It protects the electrical network from the excessive flow of electric current caused by overload and short circuits tinyzonetv
MCCB can be helpful in large-scale PV systems for isolating & protecting the high voltage machinery installed in the factories.
MCCB contains a solenoid coil that generates an electromagnetic field when current passes through electrical networks. Based on this principle, it provides an instant response to a short circuit fault.
Also, it uses a temperature-sensitive device (the thermal element) to provide a trip mechanism and protect the instruments from severe damage.
What Are The Types of MCCB
With a current rating of 2500A, MCCB can be used for a wide range of voltages and frequencies. Depending upon the circuit’s operating current and possible fault current, one can select the type of MCCB to install on their respective premises.
Following are the types of MCCB that are commonly used in high current network areas:
Circuit breakers of Type B are designed to trip if the current flowing through them is between 3 and 5 times the recommended rated load. Having an operating time of 0.04 to 13 seconds, it is the most sensitive type of MCCB. It is helpful in domestic or low voltage commercial applications where current flow is likely less.
Circuit breakers of Type C are designed to trip if the current flowing through them is between 5 and 10 times the recommended rated load. Having an operating time of 0.04 to 5 seconds, this type of MCCB helps carry commercial applications where surge current is likely moderate. anonig
Type D circuit breakers are designed to trip if the current flowing through hits 10 to 20 times the recommended rated load. Having an operating time of 0.04 to 3 seconds, this type of MCCB helps carry industrial applications where surge current is likely high.
Type K circuit breakers are designed to trip if the current flowing through hits 8 to 12 times the recommended rated load. Having an operating time of 0.04 to 5 seconds, this type of MCCB helps carry industrial applications where surge currents are extremely high.
Type Z circuit breakers are designed to trip if the current flowing through hits 2 to 3 times the recommended rated load. It is susceptible to short circuits and is used to protect semiconductor devices. It is primarily used in medical instruments where surge current is likely very low.
The correct selection of MCCB is the key to providing adequate protection in industrial premises with high voltage equipment. Also, the person should take care of its maintenance at regular intervals. Before installing MCCB on sites, it is advisable to consult a professional to get proper guidance and utilise the best outcomes. You can browse the range of MCCBs available at Legrand.