MCCB Guide: Types of MCCBs Available in India
An MCCB or a molded case circuit breaker is a kind of electrical protection device that plays a crucial role in guarding the electrical circuit again high current, which can lead to a short circuit or an overload. With maximum current ratings of 2500A, MCCBs can be utilized for a wide range of frequencies and voltages with adjustable trip settings.
Since MCCBs are used in large-scale PV systems, they are ideal for the purpose of system isolation and protection in the workspace. So, if you are planning to purchase these products for your commercial building but aren’t sure which type to look for, don’t worry. We have got you covered. In this blog, we will explain the different kinds of MCCBs available in India.
Sizing of MCCBs
Before we explore the different kinds of MCCBs, let us understand the sizing of an MCCB. Ideally, MCCBs must be sized based on the electrical circuit’s anticipated operating current and potential fault currents. The three key criteria for sizing the MCCBs are given below.
Breaking Capacity
The breaking capacity of an MCCB should be more than the theoretical possible fault currents so that it trips in case of a fault.
Trip Value
An MCCB’s trip value must be adjusted in accordance with the current drawn by the load.
Rated Working Voltage
An MCCB’s rated working voltage (Ue) must be equal to the voltage of the system.
Types of MCCBs Available
Now that you are aware of how an MCCB is sized, let us understand the various types of MCCBs available in India.
Type B
The range of operating current in Type B MCCBs trips between 3 and 5 times in the entire rated current. The operating time varies from 0.04 to 13 seconds. This makes it ideal for domestic applications, especially due to the fact that these have resistive load applications and low surge currents.
Type C
This type of MCCB trips between five and 10 times the rated current input and has a response time between 0.04 and 5 seconds. Moreover, the surge current is moderate. This makes it highly useful in commercial and industrial areas.
Type D
Type D MCCBs have inductive-capacitive load applications, such as large winding motors, motors, and pumps, due to the high surge current. These products trip between 10 and 20 times rated current and have an operating response time between 0.04 and 3 seconds.
Type K
Type K MCCBs trip between eight and 12 times rated current and have a minimum response time of 0.04 seconds and a maximum response time of 5 seconds. Its industrial applications involve inductive and motor loads with high inrush currents.
Type Z
MCCBs that belong to this category trip between 2 and 3 times rated current and have a response time between 0.04 seconds. Their surge current is very low. In fact, they are highly sensitive to short circuits and are utilized for the protection of highly sensitive devices like semiconductors.
Kinds of MCCBs by Application
While we have mentioned above the various kinds of MCCBs, it is better to know their types based on application. This will help you understand better.
Low Current Applications
MCCBs are not just for high current environments. There are MCCB products that are rated less than 100A for times when low current equipment needs adjustable trip settings that MCCBs offer.
Application in Welding
Some welding machines tend to draw high currents, which are beyond the capabilities of MCBs. this implies the need for an MCCB.
Protection of Generators
Large electrical generators provide an output of hundreds of amperes. The high current ratings of MCCBs enable them to offer reliable protection in the case of these generators.
Protection of Capacitor Bank
Capacitor banks are highly crucial in industrial as well as commercial electrical systems. This is because they enable power factor correction, decreasing line currents and preventing charges from electrical utility companies. Since large capacitor banks draw high currents, they require MCCBs for their protection.
Final Word
There are five different kinds of MCCBs available in India, namely Type B, Type C, Type D, Type K, and Type Z. Of these, Type C, D, and K have industrial and commercial applications. So, if you are looking to purchase MCCBs for your commercial space, you should consider these types of MCCBs, based on your requirements. You can explore a wide variety of MCCBs online on L&T-SuFin and then make the purchasing decision according to your needs.
Everything About MCCB Electrical; All You Need to Know About MCCB Electrical; What is an MCCB Electrical?
Whether you are a small business or a large enterprise, the safety of your workplace is extremely crucial. And while there are several aspects associated with a safe environment, we are talking about the safety associated with electrical circuits.
Many a time, a fault in the electrical circuit leads to a hazardous situation, such as fire. This happens when proper safety measures aren’t taken into consideration. Thus, to help you take these measures, this guide will explain MCCB electrical in detail. Keep reading to find out how installing MCCBs in your office building can be greatly beneficial for you.
Are MCCBs Circuit Breakers?
MCCB stands for molded case circuit breaker and is useful in cases when there is an overload or a short circuit. The key motive is to prevent any hazards that could be a result of a fault in the electric circuit. Now that you have understood the basics of an MCCB, let’s get into the specifics to comprehend it better.
MCCBs - Electrical Protection Gadgets
MCCBs are devices that can be utilized with a wide range of voltages for the protection of electrical circuits as well as appliances from excessive current. They have adjustable trip settings and can carry up to 2,500A in current ratings.
Manual Switching
MCCBs can be turned on and off manually. These are especially helpful in cases when replacements or repairs take place.
Protection Against Overload and Short Circuit Currents
MCCBs provide protection when electrical faults occur. This is done by immediately interrupting a current that is either higher because of a line fault or in the case of a short circuit. The devices protect in the case of an overload as well, that is when the current exceeds the rated value and exists for a longer period than usual.
Applications of MCCB Electrical
Since MCCBs can handle high currents, they are often utilized in cases that involve heavy duty. Some of the key applications of molded case circuit breakers are described below.
Electricals with Low Current Requirements
While MCCBs boast carrying high loads of current, they can carry those electricals that have a low current requirement as well. This is due to the feature of adjustable trip settings. In fact, Type B and Type Z have low and very low surge currents respectively.
Protection of Capacitor Banks
Capacitor banks are utilized for correcting power factors in commercial as well as industrial electrical systems. In case the currents drawn are extremely high, MCCB aids in reducing currents and protecting capacitor banks.
Protection of Electric Feeders
In case you use feeder circuits for the distribution of electric current, they can carry hundreds of amperes. In some cases, you may also possess additional circuits that require trip settings. MCCBs are useful in both cases.
How to Test an MCCB?
Testing an MCCB after installation is crucial to make sure that your building or workspace gets the required protection. Three tests must be performed to ensure the same.
Contact Resistance Test
Generally, this is a low value since the MCCB requires to enable current to pass throw even in the case of low voltage. You will be required to test the resistance of electrical contact and later compare the findings with the recommendations provided by the manufacturer of the MCCB.
Insulation Resistance Test
An insulation resistance test is performed to make sure that you obtain reliable protection. In this case, you need to disconnect the MCCB so you can test the insulation across supply terminals, load terminals, and between phases. In case the insulation resistance is less than the recommended value by the manufacturer, there is not enough protection.
The Tripping Test
You will be required to simulate an overcurrent or a fault to notice how the molded case circuit breaker reacts. We recommend you perform this test in the end because the MCCB will heat up because of the high current.
- Thermal Protection: The first step is to use an overcurrent nearly 300% above the rated value. Typically, the MCCB should trip rightly. In case it does not, it fails in thermal protection.
- Magnetic Protection: The second step is to simulate a fault by sending pulses of a very high current. These need to be extremely short because a fault can be hazardous. Magnetic protection must be instant.
In case you pass all the tests, your MCCB product is reliable and perfect for protecting. MCCBs have great industrial and commercial applications due to their excellent and unique features. So now that you have understood MCCB electrical properly, it is time you head to the online store of L&T-SuFin and start searching for the ideal MCCB for your commercial property.
A Review of The Best MCCB Products in India
Looking for the best MCCB or Molded Case Circuit Breaker products in India? We will help you find them based on numerous factors, such as features and reviews. Since such a product plays a crucial role in avoiding danger, you should be extremely careful while making the purchase. Thus, you should take several aspects into consideration while choosing the right MCCB for your commercial space. Keep reading to find out more.
Functions of an MCCB
Before we get into the details of the best MCCB products in India in 2023, let us understand their key functions. This will help you better comprehend what to look for while purchasing an MCCB for your space.
Prevention of Fire
MCCB is an electromagnetic device that detects a fault in cases of a short circuit or electrical surge in order to protect it from explosion, heat, and fire. Thus, we recommend you buy good quality MCCBs that meet industry standards so as to ensure the utmost safety.
Protecting Electrical Equipment
All electrical equipment in commercial spaces requires a steady flow of current for better functioning. Since MCCBs are made for higher loads of current, it is vital to install these in workspaces. By doing so, the light machine control systems can be guarded through the isolation of the power supply in the case of an electrical fault.
Protection Against Overload
The key motive of an MCCB is to protect against overload. The MCCBs can be automatically and manually disconnected. And unlike MCBs, which deal with low loads of current, MCCBs deal with high current.
The Best MCCB Products
Now that you are aware of the reasons behind the need for an MCCB as well as the factors you must take into consideration, let us focus on the best MCCB products in India. In fact, we will share with you three top companies in the country that offer top-notch MCCB products today.
Havells
Founded in 1958, Havells provides a range of products, from electronic devices to industrial and domestic circuit protection devices. Undoubtedly, the company offers a variety of MCCBs, including HIM MCCBs, HID MCCBs, Loadline Digital MCCBs, and Loadline MCCBs. Each of these has a compact size and robust design and complies with industry standards.
INDOASIAN
With an Indian origin, Indoasian established the trust of customers more than six decades ago. The Optium MCCBs by Indoasian range from 16A to 1250A with four breaking capacities and are even available in 4 Pole and 3 Pole kinds. Moreover, the line load reversibility as well as a unique clip design implies an easier installation of the product. And the fact that their size is just 60mm means they are perfect for small spaces. Besides, customers can choose from 5 different frame sizes, out of which 1 and 2 Frames are the most compact.
Legrand
Last but not least, the best MCCB products in India other than Indoasian and Havells are by Legrand. The company is an international specialist in digital as well as electrical building infrastructure. It offers a wide array of MCCB products, each focused on attaining the specific needs of the building. Besides, they comply with CE and ISI standards, aid in avoiding terminal burns and ensure flexibility.
Things to Consider While Purchasing MCCBs
Since there are a variety of MCCBs available in India, several aspects must be taken into account before making the buying decision to ensure that the product is capable of properly functioning and protecting your workspace in the case of an electrical fault.
Breaking Capacity
Look at the breaking capacity of the MCCB to see if it meets the requirements of your electrical system. Opt for an MCCB switch that has a breaking capacity equal to your fault current level in the system or higher than that.
Brand Reputation
The reputation of the brand plays a crucial role. The fact that a certain brand is highly popular speaks for the fact that the product is of high quality, well-priced, and is liked by users across the nation.
Product Quality
Ensure that the MCCBs you plan to buy are made of high-quality materials that comply with the regulations and standards of the industry.
Where can I find the MCCBs that I need?
The installation of MCCBs is a very important step in ensuring the safety of the workspace. Also, it is equally important to make sure that the product fulfills all kinds of needs of the space and complies with industry standards to ensure no damage is caused due to an electric fault. If you are looking to purchase MCCB products for your commercial space as well, we recommend you purchase online through L&T Sufin since there is a wide range of products available here.
Introduction to MCCB and Its Benefits
The rising use of MCCBs in industrial and commercial spaces clearly implies that these have numerous advantages in the industry. Not only do these guard a circuit from an overcurrent or a short circuit but they are also helpful in protecting electrical equipment. In case you are still wondering about the hows and whys, think no more.
In this article, we have explained what MCCBs are, how they operate, and their numerous benefits. So without delaying further, let’s delve into the details.
What is an MCCB?
MCCB stands for molded case circuit breaker. As their name suggests, they are used for breaking the circuit in the case of a short circuit and overcurrent, thus guarding the circuit. These electromechanical devices are utilized for controlling the electric energy in distribution as well.
What are MCCBs Made of?
An MCCB is made from a trip button, a handle/trip-free mechanism, a magnetic trip unit, a thermal trip unit, a terminal connector, an operating mechanism, contacts, and an arc chute.
Are MCCBs the same as MCBs?
Molded Case Circuit Breakers are basically an advanced version of MCBs or Miniature Circuit Breakers. They are the same in the manner that they operate similarly. Nonetheless, MCCBs offer additional features like adjustable trip settings and remote closing.
What is the Function of an MCCB?
MCCBs have numerous functions, all associated with protection. To begin with, these protect against overloading. This is when the current exceeds a predetermined limit for a certain duration.
Further, MCCBs protect against short circuits, that is when the live wire comes into contact with a neutral or live wire. Through the existence of MCCBs, fire hazards, and electric equipment damage can be prevented.
How do MCCBs Operate?
MCCBs utilize a thermal element, which is a temperature-sensitive device, along with a magnetic element, which is a current-sensitive electromagnetic device. These offer the trip mechanism for isolation and protection purposes. Overall, these aid in the following:
Electrical Switch for Disconnection
MCCBs can be utilized as manual disconnection switches, especially in the case of maintenance operations or emergency cases. When the contact opens, an arc can be formed. To fight this, MCCBs comprise internal arc dissipation mechanisms that allow for the quenching of the arc.
Protection Against Short Circuit Currents
in case of a short circuit fault, a large current starts flowing through the solenoid coil. This results in the establishment of a strong electromagnetic field, which opens the contacts by attracting the trip bar.
Protection Against Overload
The temperature-sensitive component through MCCB offers protection against overload. In case the current exceeds the trip value, the bimetallic contact begins heating and bending away because of the varying thermal rates of expansion. Eventually, the circuit is interrupted.
Benefits of Using MCCB
There are several advantages of using MCCB for commercial or industrial purposes. So if you are planning to install an MCCB at your workspace, you will be delighted to know what these benefits are.
Ease of Installation
First and foremost, MCCBs are compact in size, which means they require lesser space and can be installed anywhere. Moreover, it is very easy to move as well as handle and thus, easy to install.
Protection of Power Circuit
The key advantage of MCCBs is associated with the protection of the power circuit from faulty electric currents, such as a short circuit or an overcurrent. Moreover, these products can easily sense such faults and guard the system against hazardous conditions like fire.
In the case of a fault, MCCBs take very less time for resetting and switching on. Besides, they have high carrying current capacities, which range from 100A to 1kA, and interrupting ratings between 480V and 150kA. This makes it perfect for industrial and commercial applications due to the ability of carrying large currents.
Time and Cost Efficient
The double insulation technique of MCCBs implies that the electrical accessories can be mounted directly with the installation of the circuit breaker. This results in high efficiency and thus saves costs as well.
Final Word
MCCBs are ideal for commercial spaces due to their ability to carry large loads of current. In fact, you can look for MCCBs online at L&T-SuFin and choose from a wide variety of these products. Remember to carefully consider your building needs before purchasing.