Difference between MCB and MCCB

Both MCB and MCCB are circuit breaker so most of people are confused about the difference between them. One of the major difference between MCB and MCCB is that in MCB interrupting rating of under 1800 ampere whereas the MCCB interrupt rating of around 10000-200000 amperes. Before learning the difference between them first you check it out discussion inside to MCB and MCCB. The differences make them application-specific in an electric circuit. 


What is MCB?


An MCB stands for a miniature circuit breaker is an electromechanical device that protects the electrical circuit from overcurrent resulted due to overload, short circuit or anything which causes excessive current flow. The most important advantage of using MCB over fuse is that the power supply can be resumed almost immediately. So that points MCB is better to fuse.

 MCB is classified according to the tripping over the rage of fault current. It is most important for you to know what type of MCB trip curve to decide what type to use for different appliances for the correct electrical system. Before learning about type first understand the trip curve. Trip curve is essentially nothing but the maximum current that particular MCB can withstand. Here there are six different types of MCB, which are A, B, C, D, K, and Z.
  • MCB is a thermal/thermomagnetic device.
  • It provides protection against over current and short circuits.
  • It is available in single, two three and four-pole versions.
  • It commonly used in lighting circuits.
  • Available up to 100A and have a maximum short circuit capacity of 25KA.

What is MCCB?


An MCCB stand for, molded case circuit breaker is a circuit breaker and trip device assembled in a molded case. It also operates in case of overload and short circuit. MCCB is commonly used for industrial applications for high power equipment.
  • It may be a thermal/thermo-magnetic/Electronic trip type.
  • It primarily provides protection against the current and short circuit.
  • It can provide protection against mainly on residual currents and under voltages.
  • Available up to the rating of 2500A.
  • Remote ON/OFF is possible with some additional accessories.
  • Some MCCBs are microcontroller based.
  • Available in a single. two, three and four-pole versions.

Difference between MCB and MCCB :

  • MCB stands for Miniature Circuit Breaker while MCCB stands for Molded Case Circuit Breaker.
  • MCCB and MCCB both are the thermomagnetic devices and they are classified under low voltages breaker.
  • The size of the MCB is small but the size of the MCCB is big.
  • Both are low voltage circuit breakers created to meet IEC( International electrotechnical commission) 947 standards.
  • MCB is a type of switch which protects the system from overload current whereas the MCCB protects the system from over-temperature and short circuit current.
  • MCB is a tripping circuit of the MCB is fixed while in MCCB is movable.
  • MCB is rated current not more than 125 Ampere, MCCB current rated up to 1600 A.
  • Interrupting current in MCB  under 10KA while In MCCB interrupting current range from around 10KA-85KA.
  • MCB has a single, two or three pole version whereas the MCCB has a single, two, three or four-pole version.
  • MCB is mainly used in a low current circuit while MCCB is mainly used in for the heavy current circuit.
  • The cost of the MCB is low but the cost of MCCB is high.
  • MCB is used for home application, domestic purposes while MCCB is used in large industrial or commercial applications.
  • The remote ON/OFF is not possible in MCB but MCCB  is possible by the use of shunt wire.
  • A circuit breaker is installed for safety reasons.
  • Some of the MCCB units are specially made to respond to remote control signals, usually as standby power.
  • MCCB has a higher capacity than an MCB, both are classified under low voltage circuit breakers.
  • Both of the MCB and MCCB are highly durable and can last for years depending on the manufacturer.
  • Morden MCCBS has alarm system but there is no alarm system in MCB.

You may also learn about this topic:

Basic Electricity MCQ

1. The draft velocity of electrons is
A. Larger then the speed of light
B. Almost equal to the speed of light
C. Equal to the speed of light
D. Very small in comparison to the speed of light 

2. Ohm’s law applicable to
A. Temperature is reduced
B. Temperature is increased
C. Number of free electrons available become less
D. Number of free electrons available become more

3. A network having one or more than one source of emf is called
A. Passive network
B. Active network
C. Linear network
D. Non-linear network

4. Energy Meter for connection has
A. 2 terminals
B. 4 terminals
C. 6 terminals
D. 8 terminals

5. Kirchhoff’s laws are not applicable to circuit with
A. Distributed parameters
B. Lumped parameters
C. Passive elements
D. Non-linear resistance

6. Kirchhoff’s  current law is applicable only to
A. Electric circuits
B. Electronics circuits
C. Junction in a network
D. Closed-loop in a network

7. The fuse rating is always expressed in
A. Volts
B. Amperes
C. Ampere-volts
D. Ampere hours

8. An electric battery is a device that
A. Generate the emf by chemical action
B. Convert the heat energy into electrical energy
C. Convert mechanical energy into electrical energy
D. Convert fuel energy into electrical

9. Cell are connected in parallel in order to increase the
A. Life of the cell
B. Efficiency
C. Current capacity
D. Voltage rating

10. Cell are connected in series in order to increase the
A. Life of the cell
B. Terminal voltage
C. Current capacity
D. Voltage rating

11. In Fleming’s left-hand rule thumb always represents direction of
A. Current flow
B. Magnetic field
C. Mechanical force
D. Induced EMF

12. The capacity of a lead-acid battery does not depend upon
A. Charge rate
B. Discharge rate
C. Temperature
D. Density of electrolyte

13. In Fleming’s left-hand rule thumb always represents direction of
A. Remains constant
B. Varies
C. Decreases
D. Increases

14. Lamps in street lighting are all connected in
A. Series
B. Parallel
C. Series-parallel
D. End-to-end

15. Which of the following statements associated with inductors is wrong?
A. An inductor is a sort of short circuit to DC
B. An inductor is a sort of the open circuit to DC
C. An inductor never dissipates energy but only store it
D. A finite amount of energy can be stored in inductors even if voltages across it is zero,
  such as when the current through it is constant.


Advantages and disadvantages of MCCB

MCCBs stands for molded case circuit breaker, it is used to control electric energy in distribution n/k and is having short circuit and overload protection. MCCB  is a circuit breaker that is an electromechanical device that guards a circuit from a short circuit and over current.

The main primary function of MCCBs is to give a mean to manually open circuit, automatically open circuit under short circuit or overload conditions. In an electrical circuit, the overcurrent may result in faulty design.  Let us have a deep insight into the advantages of the molded case circuit breaker, to know more about it. 

Advantages of MCCB:

  • MCCB has a prevent the electrical device from faulty situation.
  • The maintenance cost fee is free and recurring costs are less.
  • This device is compact in the measure. hence saves wide space in the panel design.
  • MCCB can clear several faults before it is due for replacement.
  • In this circuit breaker, some multi-purpose accessories can be fitted with the MCCB.
  • When we have to use MCCBs, there is no possibility of single phasing due to fault in only one phase.
  • MCCB takes less time to reset and to switch on while it trips down during the faults.
  • Along with MCCBs, there are certain accessories that can be fitted and few also act as multi-purpose usage.
  • Some multi-reason adornments can be fitted with the MCCB.
  • MCCBs have to limit downtime. Unlike in a fuse based system, there is no searching for a replacement fuse. It is very well may be reset and switched on again instantly in the wake of finding the blame that caused the stumbling amid activity.
  • MCCBs can clear a few blame previously it is expected for substitution.
  • MCCBs are used for electrical feeder protection against overcurrent, earth fault and under voltage.

When you have bought online following some point to benefits which leads you in making the right decision for shopping of MCCBs:

  • Time-saving.
  • 24/7 order placement.
  • Technical specification and consultations online.
  • Exclusive offers, discounts, and better prices.
  • Easy step process to place an order.
  • Wide variety of branded products, listed in the catalog.
A molded case circuit breaker is a fundamental component of electrical protection for high current applications. Adequate size and maintenance of MCCB are key elements in order to guarantee safe and also reliable in the long term.
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LM7805 pinout | Introduction | Feature | Diagram | Application

Introduction about IC LM7805 :


In this page, we will discuss one of the most commonly used regulators IC's, the 7805 voltage regulator IC. AS we know that a regulated power supply is very much essential for several electronic devices due to the semiconductor materials employed them have a fixed rate of current as well as voltage. 

One of the most important sources of dc supply is batteries, but while using batteries, it is very sensitive electronics circuit is not a good idea as batteries eventually drain out ad lose their potential over time. 

7805 is a three-terminal linear voltage regulator IC with a fixed output voltage of 5V which is useful in a wide range of applications. Currently, the 7805, voltage regulator IC is a manufactured by many companies like texas instrument, ON semiconductor, ST microelectronics, diodes incorporated, Infineon technologies, etc

LM7805 pinout diagram :


LM7805 is shown in the figure has a three-terminal device with the three pins being Input, Ground, and Output.

Input: Pin 1 is the input pin. A positive unregulated voltage is given as the input to this pin.

Ground: Pin 2 is the ground pin. It is common to both input and output.

Output: Pin 3 is the output pin. The output regulated 5V is taken at this pin of the IC.
LM7805 Pinout

7805 Regulator Features : 

  • 5V positive voltage regulator. 
  • Operating current is 5MA.
  • Minimum input voltage is 7V.
  • Maximum input voltage is 25V.
  • 5Ω load resistor.
  • Required very minimum external component to fully function.
  • Available in TO-220 and KTE package.
  • It can deliver up to 1.5A of current. 
  • Internal thermal overload and short circuit current limiting protection is available.
  • Junction temperature maximum of 125-degree celsius. 
  • This IC has both internal current limiting and thermal shutdown features. 

Application of LM7805 : 

  • It can be used regulated dual supply. 
  • The constant +5V output regulator microcontrollers and sensors in most of the projects. 
  • It is used in a wide range of circuits. 
  • It is used as a fixed output regulator. 
  • It can be used current limiter for certain applications. 
  • This IC can be used regulated DC voltage regulator. 
  • The output polarity reversal protection circuit. 
  • Reverse bias protection circuit. 
  • Used as a positive regulator in negative configurations. 
  • Used in the current regulator. 
  • LM7805 IC can be used as an adjustable output regulator.

Conclusion : 

  • The most important point is that the input voltage should always be greater than the output voltage. 
  • The input current and the output current are almost identical means that when a 7.5V, 1A supply is given at input the output will be 5V, 1A. 
  • The remaining power is dissipated as heat and hence a heat sink like the one shown below must be used with LM7805 IC. 

Advantages and disadvantages of MCB

MCB stands for miniature circuit breaker, it is an electromechanical device which protects an electrical circuit from short circuit, faulty design, and overload which may lead to overcurrent. MCB is a better alternative to a fuse as it has more advantages over the later one. The disadvantages of fuses are that when they have operated they must be replaced. An MCB has overcome this problem since it is an automatic switch which opens in the event of an excessive current flow circuit in the circuit and can be closed when the circuit returns to normal.  Let us have a deep insight into the pros and cons of the Miniature circuit breaker to know more about it. 

Advantages of MCBs:

  • MCBs have more sensitive to current then fuse. 
  • It has quick work against short circuits.
  • It works quickly on overloading and under voltage.
  • It is reusable hence less maintenance cost and less replacement cost.
  • It is very simple to resume the supply.
  • It can be easily used circuit control switch when needed.
  • Handling MCB is electricity safer than handling fuse, in case of MCB.
  • It has reliable.
  • MCB provides a better interface.
  • MCB performance immediate indication of faculty circuit.
  • The performance of MCB is good in case of earth leakage.
  • In the case of surge current, The MCB has time delay characteristics, therefore, it works properly.
  • Shorter tripping time under moderate over current than with fuses.
  • When the use of MCB, the faulty zone of the electrical circuit can be easily identified.

Disadvantages of MCBs:

  • The cost of the MCB is greater than the fuse.
  • The cost of the MCB distribution board is greater than the rewireable fuse board.
  • The risk of overloading of the circuit due to unqualified of the person operating than completing removed.

PCB advantages and disadvantages

The PCB stands for the printed circuit board. This board is a very vital part of modern electronic equipment. Printed circuit board consists of a very large number of passive as well as active components required. The components are connected from side to side with traces on the board. It is absolutely to develop very large circuits on small printed circuit boards with the availability of very small-sized electronic components. Let us have a deep insight into the advantages and disadvantages of the printed circuit board to know more about it. 

Advantages of PCB :

  • PCBs has a low cost, mass production can be achieved at a lower cost.
  • It is Re-workable.
  • Widely available.
  • Excellent shelf life
  • This board gives low electronics noise.
  • Compact size and saving of wire.
  • Inspection time is reduced because PCBs eliminates the probability of error.
  • This board takes less time in assembling a circuit as compared to the conventional method.
  • In this design, there is no chance of loose connections or short circuit.
  • If in case of any damage, it is very easy to check and replace the particular failure components.
  • Printed circuit board design to offer uniformity of electrical characteristics from assembly to assembly.
  • The location of the electronic part is fixed and it is easy to simplify components identification and maintenance of equipment.
  • Component wiring and assembly both can be mechanized in a circuit board manufacturing facility.
  • All of the above factors bring reliability in the performance of the circuit.

Disadvantages of PCB :

  • Uneven PCB surfaces finish.
  • Not good for fine-pitch.
  • It contains lead.
  • Thermal shock.
  • Solder bridging.
  • Not easy to repair once damaged.
  • It can be used for a specific circuit.
  • We cannot be updated, once printed.
  • Plugged or reduced.
  • Redesigning is required for one type of circuit operation.
  • The etching process generates chemicals which are a harmful effect on the environment.
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Soldering advantages and disadvantages

Soldering makes quick and neat connections to electronics equipment and plumbing. Soldering may require more practice, skills and some perfect knowledge for doing it. In this article, let us have a deep insight into the merits and demerits of soldering to better understand this topic.

Advantages of soldering:

  • It is simple, low cost, flexible, economical and user-friendly.
  • Base metal does not melt, so the low-temperature heat source can be used. 
  • Any metals, non-metals can be joined by this process.
  • This can be operated at a low temperature.
  • Less time required to join.
  • The life of the solder will be more.
  • Soldered joints can be dismantled.
  • This can be easily operated.
  • Low process temperature.
  • Low amount of power is required to heat the soldering iron.
  • Thin wall part may be joined.
  • Easily automated process.
  • Dissimilar material may be joined.
  • This operation required low power.
  • The soldering can be done at low temperature, and control very easy.
  • No thermal distortion and residual stresses in the joint parts. 
  • The microstructure can no be affected by heat. 

Disadvantages of soldering:

  • This is not useful when joint works under high temperature. 
  • Strength of the joint is less.
  • Soldering process can not join heavy sections.
  • It is suitable for only small parts.
  • It is not useful at long length weldings.
  • Heavy metals cannot be welded by this operation.
  • There is a chance to toxic components at fluxes.
  • Careful removal of flux residuals is required in order to prevent corrosion. 
  • The large section can not be joined.
  • Skilled labour is required for soldering.

Advantages and disadvantages of breadboard

We all know about basic knowledge about breadboard, it is cone in the form of the rectangular boxes perforated with holes for mounting electrical projects. Holes must be punched on the test cards are commonly called nodes. They are used to insert wires and some electronics part through them to complete electrical circuits, so easy to mount your electrical project on a breadboard. 

A breadboard is readily available and also it is inexpensive to use on your PCB design. In the market, there is a lot of different type of breadboard available such as the Velleman SD 35n solderless breadboard, self-adhesive mini Tie point.  Let us have a deep insight into the advantages and disadvantages of Breadboard to know more about it. 

Advantages of Breadboard :

  • It has easy to quick to check for easy and complex circuits both and it has easily verified circuits at the initial stage, so it can save time.
  • Quick to check component around.
  • It is easy to adjust.
  • It is flexible.
  • No drilling holes.
  • No soldering required.
  • It can be debugged easily.
  • A solderless connection makes it reusable.
  • Cheap and connections can be changed. 

Disadvantages of breadboard :

  • It is unreliable.
  • Difficult to replicate.
  • It is temporary.
  • It is heavier.
  • A breadboard is noisier than properly laid-out circuit boards, sometimes far too noisy.
  • It is difficult to troubleshoot due to human error and some poor connections problem.
  • Not good for high current applications.
  • Not meant for withstand high voltage anything above 48 V. 
  • It works very poorly for high-speed design.
  • Difficult to modify complex SMD component for prototyping.
  • It almost always, take up more physical space than the final circuit board design.
  • High parasitic inductance and resistance and capacitance between adjacent rows. 
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Conclusions :

The breadboard has easy to quick to check for easy and complex circuits both and it has easily verified circuits at the initial stage. So in all over the world, we all know that every electronics or in the electrical project must be designed on a breadboard. But, as the designing complexity of the project circuit increases and consume more time with the increases in the complexity of the project. So there are used some advanced tools and board such as PCBs, and so on for designing complexities and save time.

 So here this page has the right place to design and implement your own electronics project using a breadboard with proper knowledge. So any queries regarding designing and implementing problem on breadboard please comments in the comments section below. 

Yagi UDA antenna advantages and disadvantages

The yagi UDA antenna is a particularly popular form of the antenna where directivity and gain must be required. The yagi UDA antenna offers many advantages over the other types of antennas in a lot of applications. However, it is necessary to weigh both advantages and disadvantages to ensure that the correct antenna type is chosen for any particular use.

Advantages of yagi UDA antenna:

  • It is simple to build.
  • It is a compact size and also it is must in lightweight.
  • It offers wide bandwidth due to the use of folded dipole.
  • It is lower cost because easy of handling and maintenance.  
  • It offers a unidirectional radiation pattern which is reasonably good.
  • It offers substantial increases in directivity and gains compared to the considered simple dipole antenna.
  • It can be easily mounted with standard mechanical fixings on vertical poles or other poles.
  • High gain is achieved about to 7 dB. 
  • Less amount of power is wasted.
  • Frequency coverage is broad. 

Disadvantages of yagi UDA antenna:

  • It is sensitive to frequency.
  • It does not offer very high gain limited around 20 dB. 
  • The design is obstructive in nature.
  • Bandwidth is reduced if a number of director element is used in the array.
  • Need a large number of elements to be used.
  • It is prone to noise. 
  • It is also prone to atmospheric effect. 

Conclusion :

The Yagi antenna is a very practical form of RF antenna design suitable for applications requiring gain and direction. Although the cost is higher than the basic antennas, the Yagi often offers the most cost-effective gain and directional option.

LM358 pinout | Introduction | Configuration | Features | Packages | Advantages | Application

As we know that there are available in various forms of 555 timers, single logic gates, microcontrollers, microprocessors, voltage regulators and op-amps like different ICs IC  LM741, LM7805, LM35, LM324 IC, LM337, LM338, LM339 IC, LM340, LM1117 and many more ICs are available. Here we have to learn or introduce IC LM358 because it has low power and easy-to-use dual-channel op-amp IC. This IC is designed especially to operate from a single power supply over a wide range of voltages. It is a good, standard operational amplifier and the most important point for this IC is suitable for your needs. LM358 IC is available in a small size as a chip. This IC is most commonly used in the device due to its cost-efficiency. Let us have a deep insight into the introduction, pinout, configuration, features, packages, advantages, and applications of LM358.

Introduction to LM358 :


LM358 consists of two independent compensated operational amplifiers with high gain frequency. LM 358 IC is available in the cheap sized package so this must be used in real-life applications including DC gain block, conventional OP-AMP circuits design, active filters, and transducer amplifier,  This post also gives some information about these ICs like Pinout of LM358, features, Applications, advantages, Pin configuration of LM358, Also give some real-life applications of LM358. So you have to learn some different ideas related to your project you are in the right place to study.

Pinout LM358 :

  • LM 358 has eight (8) pins in total having different individual functions associated with each of them.
  • Pin-1 and pin-8 are the output of the comparator.
  • Pin-2 and pin-6 are inverting inputs.
  • Pin-3 and pin-5 are non-inverting inputs.
  • Pin-4 is the GND terminal.
  • Pin-8 is VCC+.
LM358 IC pinout

LM358 pin configurations :

  • Here I have to represent with a complete pin diagram along with full animations.
  • A properly labelled pin diagram of any device results in better standing of the user, so the users can easily understand pin configurations.
  • The complete pinout diagram along with animation, a real image of LM358 and symbolic representation is shown in the figure below.
LM358 pin configurations

Features of LM358 IC :

  • It consists of 2 OP-AMP internally.
  • The output voltage swing is high.
  • The large DC voltage gain is around 100 dB.
  • Wider bandwidth in 1 MHz(Temperature compensated).
  • The supply current drain is very low.
  • Wider power supply, in the single power supply, is 3V to 32 V while the dual power supply is +or-1.5 V to +or- 16 V.
  • 2mV low input offset voltage.
  • Common mode input voltage range comprises ground.
  • The differential input voltage range is similar to the power supply voltage.
  • Internally frequency compensated for unity gain.
  • Short circuit protected outputs.
  • Soldering pin temperatures at 260 C.
  • The available packages are TO-99, SOIC, DSBGA, and CDIP.

LM358 packages :


The available package is TO-CAN, SOT-23(5), DSBGA, PDIP. all of these packages along with their dimensions and part numbers are given below:

PACKAGES:

PDIP(8) - 9.81 𝝬  6.35 and unit - mm
DSBGA(8) - 1.31  𝝬 1.31 and unit - mm
TO-CAN(8) - 9.08  𝝬 9.09 and unit - mm
SOIC(8) - 4.90  𝝬 3.91 and unit - mm

Advantages of the LM358 IC :

  • Two operational amplifiers are compensated internally.
  • Permits direct sensing close to GND and VOUT.
  • Well suited with all methods of logic.
  • Power drains are appropriate for the operation of the battery.
  • Two internally compensated for OP-AMP.
  • Eliminates the need for dual supplies.

LM358 applications :


LM358 has a wide range of real-life applications, we have represented the major applications of LM358 listed below:
  • It must be used in the DC gain block.
  • It can be used for signal conditioning.
  • It is used for active filters.
  • Current loop transmitter for 4 to 20mA.
  • It can be also used in transducer amplifiers in real-life applications.
  • This IC also be used in operational circuits.
  • It must be used in real-life applications like shock alarm circuits and dark sensor circuits.

Simple Schock alarm circuit using LM358 :

  • The shock alarm circuit using LM358 is very easy to design and it has many applications from home automobiles.
  • The main application of this circuit is as an anti-theft alarm in automobiles. In this circuit, a piezoelectric sensor is used as a shock sensor that has to be mounted on the door which you have to guard. 
  • Here shown in figure LM358 is connected in the inverting Schmitt trigger. The port R1 sets the threshold voltage of the circuit. R1 is used as the feedback resistor.
  • When the piezoelectric sensor has not activated the output from the piezoelectric sensor will be low and so will the output of the IC, So at a time output of the sensor is high and activates as a Schmitt trigger. Then it gives the buzzer sound. 
  • The buzzer remains beeping for some time even if the vibration is detached. This is because when inverting input has little effect when the LM358 IC is triggered and the state can't be easily inverted. So fix the sensor firmly to the surface, wherever you place it and it is always good to place the sensor near to the doorknob. 
  • So here this figure has to use the 3-volt battery as a power supply and regulate the R2 register to obtain the necessary sensitivity.
Schock alarm circuit using LM358


Conclusions :


Here this post gives the all about information IC LM 358 like pinout, pin configurations, applications, advantages, features, and also real-life applications. We hope you all understand this topic. Furthermore, for queries regarding your project please give your feedback by commenting in the comment sections.
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