For Maintenance or Fault Cleaarence. It can safly close & open a city to prots
Rated Current. A Short Circuit Occurs when Two Exposed Wires COME INTO CONTACT WITH EACH EACHER BY AnY Means.
Related Post: Difference Between MCB, MCCB, ELCB, RCB, RCD or RCCB CIRCUIT BREAKERS
The main objective of a circuit breaker is to safly break open the circuit
It Should Momentarily withstand the Fault Current
It Should Safly Break Open The Circuit
It Should Quickly Extinguish the Arc.
ITS TERMINALS Should Withstand the Voltage after Breaking.
It Should Prevent the Arc from Re-Strinking.
Open The Contracts USING Thermal Expansion or An Electromagnetic Field USING A Solenoid.
Air
Vacuum
Insulating oil
Insulting Gas Such AS SF6 (Sulphur Hexafluoride)
Other than the Medium bebing used arch quenching, various arc extinction techniques are used to quickly & safly eliminate an arc.
Related post: How to find the proper size of circuit breaker? Breaker Calculator & Examples
, The Voltage Required to Maintain the Arc Also Increases & The Current Starts to Drop Resulting in Arc Quenching.
Reducing the CurrenThich Leads to the Exhibition of the Arc.
ReduCing Cross-section of Arc: Another technique is to reduce the crass-section of arc by reducing the controlfores. The voltage required for arc informationSESESESESESESESESEST
Reducing the Arc Current & Eventually Extinguishing It.
Then, then
Basically, A Circuit Breaker is sheSSARY to Install on Every line to propy it from any kind of hazard or disasters.
Intended Voltage Applications
Alternating or Direct Current
Location of the Installation
Design Characteristics
Method and Medium used for Current interruption (Arc Extinction)
There are various types of circuit breakers that are differentity basid on various characteristics.
AC CIRCUIT BREAKER
DC Circuit Breaker
Related Post: Can we use account accuit breaker for dc circuit & vice versa?
Circuit Breakers used for account for quite different than in dc. Inherent zero brossings in acvide multiple class in a second for the arc to extantinguish ittem.
High Voltage AC Circuit Breaker
breakers.
The Arc Extinction Can be do done using various method in such high voltages. The HV Circuit Breaker may or may not use the arc excitections; thereting tan: then: are classified in.
Oil Circuit Breaker
Oil-less circuit breaker
Related Post: Difference Between Relay and Circuit Breaker
Oil Circuit Breaker
Starts Ionizing & Creates An Arc Between The Contorys.
Pressure On It Increasing de-Yization of the Medium. De-Yization of the Medium Increases ITS DIELECTRIC StreingTh that Will Quench The Arc at Zero Crossing of the Curren.
Besides that, The Cooling Effect of the Oil & The Gas Bubbles Also helps in Arc Quenching.
Based on the Amount of Oil Being Use in OCB (OIL CIRCUIT BREAKER), They Are Classified Into Two Two Types
BULK OIL CIRCUIT BREAKER (BOCB)
Minimum Oil Circuit Breaker (MOCB)
Related Posts:
Types of HVDC Systems and MTDC Configurations
Types of Facts (Flexible AC Transmission System) Controller & Devices
BULK OIL CIRCUIT BREAKER (BOCB)
Such Type of Oil Circuit Breaker Ueses The Insulating Oil to Quench The Arc As INSULATE The LIVE Contacts FRTHE EARTHED PARTS of the CB. Such cb user in bulk.
Safly Outside.
Plays ITS ROLE IN Quenching The Arc Once The Current Goes Through Zero Crossing.
The bocb is divided into further two types base on the division of arcs to Quickly expressinguish it.
Relands
Single Break Bulk Oil Circuit Breaker
The controls.
Double Break Bulk Oil Circuit Breaker
Into Two PARTS HAVING LOWER Streangth Which Can Be Easily Cooled Office The Oil.
Advantages
The Oil use for Arc Quenching Has Very High Dielectric Stringth
The Oil Insulaters the Live Contacts from the Earthed Parts
The Oil Produces Hydrogen Gas with The Heat from the Arc Which is Benefoice for Arc Quenching.
The Pressure of Oil Compresses The Gas to Deionize the Medium.
The Gas Also helps in cooling the medium.
Disadvantages
The Oil is inflammable & causes a fire hazard.
The controls can get damaged with the arc.
The Carbonization of the Oil from the Contory Reducess ITS DIELECTRICTRIC Streingth.
The controls & the il must be checked & maintaind regulaly.
The user of huge amount of il information was cost
Their large illed tanks are heavy & take laarge space.
Minimum Oil Circuit Breaker (MOCB)
"
Then, then
The Oil from the Support Chamber with the Help of the Piston. As they contact moves downward, a venT Becomes Available for the Hydrogen Gas to exhausst out.
In terms of vennting, mocb is divided insto two types.
Axial Direction Through The Upper Vent.
The Axial Venting Generates Very High Pressure Thus Having Very High de-Weization Capabilities & Consequently High Dielectric Streangth of the Oil. It is using a.
Radial Venting Mocb: While in Radial Venting Mocb, The Vents Are Designed Radially Along the Arc Chamber. The Arc is Swept Radially Through the Multiple Vents.
The Radial Venting Has Low Pressure Thus The Oil has low Dielectric Streangth. TheReface, Radial Venting MOCB is used for high current at low voltages.
A Combination of Both Axial & Radial Venting is using inside a single mocb to break both low & high volages efficiently.
Advantages
It requires a very less amount of il.
Less amount of il means the risk of fire hazard is low.
It has low weight.
It has Small Size & Takes Up Small Space
It is cheaper than bocb.
It has Easier Maintenance & Oil Can Be Easily Replaced.
Best for installation in Places where it is not foodly using.
Disadvantages
Lesser Oil is more affected by the amount of carbonization from the contacts.
The Oil Quickly Losses its Dielectric Streangth.
It is requires more free with makingnance.
Related Post: How To Read MCB Nameplate Data Rating Print on it?
OIL IMPULSE CIRCUIT BREAKER
Oil less
Air Circuit Breaker
Air Blast Circuit Breaker
Sf6 circuit breaker
Carbon dioxide circuit breaker
Vacuum Circuit Breaker
Air Circuit Breaker (ACB)
To the absence of inflamMable Oil & The Risk of Fire Hazards.
Then, then
While the arcing contacts remain closed.
"
ACB is further divided into the following types.
Plain Air Circuit Breaker
ARC-chute Circuit Breaker
Magnetic Blow Out Circuit Breaker
Air Blast Circuit Breaker
Related Post: Air Circuit Breaker (ACB) -Construction, Operation, Types and Uses
Plain Air Circuit Breaker
It has multiple Small Compartments Made from Section of Metallic Plates.
. It is using for low voltage applications.
Air Chute Air Break Circuit Breaker
absorb the damage from arcing.
Arcing contagos are easily replaceable in case of wear & tear.
Magnetic Blowout Air Circuit Breaker
Extinguish the Arc But Merly Deflects It Which is Later Extinguished by the Air. It Offers Control over the Arc to Increens Voltage.
Air Blast Circuit Breaker
up to 450kv. They are used for 220kv lines in switchyards.
The Air Blast Circuit Breaker is Further Divided Into Four Types
Axial Blast Air Circuit Breaker
Axial blast with slice moving contact acb
Radial Blast Air Circuit Breaker
Cross Blast Air Circuit Breaker
Axial Blast ACB
arc is extinguished.
Related Post: Difference Between Fuse and MCB
Axial Blast ACB with Sliding Moving Contory
Arc Quenching Operation as discussed in the previous acb.
Radial Blast ACB
contacts along the arc theReface it is Called Radial Blast ACB.
Cross Blast ACB
arc chamber for the air to flow out.
Splitters Split the Arc that is eventually queenched at the zerouroRent. The Air Blast Also Increases the Dielectric Streangth of the Medalen THEGEG.
Advantages of ACB
ACB DOES not have any fire hazards, unlike ilcuit breakers.
ACB HAS A VERY High Speed I.E. ITS Arc Quenching is very fast.
The speed of arc queenching is the ame for all values of carent.
It has Small Size Due to Small Space Required for An Air Blast to Cool & Quench The Arc.
It is use for free file.
It is very relle & consident becauSe Short Arcing Time Cannot Wear the Contory Quickly.
It requires less, to leave the controls.
ACB is fairly cheaper asre is used as the arc queenching medium.
Disadvantages of acb
The Air Compressor Needs to be Maintained to have the correct presure at all the time.
The Air Compressor Takes Up a Large Space.
The Air Pipes Junction May Leak Air Pressure.
TheRe is a channel of a high rate rate of re-stricing voltage and can chopping.
The Air Release Produces a noise.
Air As Compared to Other Insulating Gases Lower Extinguishing Properties.
Related Post: Difference Between Circuit Breaker and GFCI
Sulphur hexafluoride (sf6) Circuit Breaker
Sulphur hexafluoride or Shortly Known as sf6 is a non-flammable & insulating gas that has very high electronic.
This enhances the dielectric stream of themedium where the arc is quenchd. The sf6 has far more superior insulation & arc quenching capabilities Than Air almost 100 times bet.
Operation. The System Also Monitors Its Pressure Which IS Directly Proportional to ITS DIELECTRICTRICTRINGTH.
There are three types of sf6 circuit breakers
Non-PUFFER TYPE SF6 Circuit Breaker
Single Pressure Puffer Type sf6 Circuit Breaker
Double Pressure Type sf6 Circuit Breaker
Non-Puffer Type
contacthas vents for pressurized gas to flow.
SF6 Quench The Arc & Flows Through the Hollow Moving Contory. This Gas is then Recombined & Pumped Back Into the Gas Chamber for Re-Utilization.
NON-PUFFER SF6 CIRCUIT BREAKERS WEERE UASED WHEN THEY WEEY Wee First Invented. Nowadays Easier & SIMPLE SF6 BREAKERS Are Userly the Puffer Cylinder.
Related post: How to wire a gfci circuit breaker? 1, 2, 3 & 4 poles gfcis wiring
Single Pressure Puffer Type sf6 Circuit Breaker
in the Figure. by moving the cylinder, its interzard volume can be varied.
Flowing Out Through The Hollow Contory. This Pressurized SF6 Quenches the Arc.
Then, then
Double Pressure Type sf6 Circuit Breaker
Stored in the Gas Chamber.
Due to Low Temperature.
Advantages of sf6 Circuit Breaker
SulPhur HexaFluoride SF6 Has Superior Arc Quenching Property Almost 100 Times More Effective THAN Air.
The arcing time of the sf6 circuit breaker is very short.
The Dielectric Streangth of SF6 GAS IS 2 to 3 Times Higher than Air.
Due to high dielectric stringth, the required contact section is small to prevent arc restriking.
High Dielectric Streangth Leads to Large Current Interruption Capabilities.
The sf6 CB has a compact design. Thus require small space & count for installation.
Sf6 Gas can handle all knows of switching phenomena.
SF6 CB HAS A Closed Circuit Gas System with No Leakage. TheReface, Best for Any Installation in Any Kind of (Extreme) Environment.
No carbon particles are formed with arcing, thus the dielectric stringth does not redule.
It Does Not Require An Expensive & Bulky Air Compressing System Except for Double Pressure Type Which is Obsolete.
The operation of sf6 cb is noiseless.
Sf6 Gas is non-toxic in its pure state.
SF6 GAS NON-FLAMMABLE, Thus No CHANCE of Fire Hazards.
SINCE ITS Operation is Flawless, It Requires Less Maintenance.
Disadvantages of sf6 circuit breaker
The byproducts formed from sf6 GAS During ARCING ARCING ARE TOXIC for the Environment But they mostly recombined into sf6
The decomposed sf6 is toxic.
Sf6 is an exitensive gas so thecuit breakers areornly.
Leakage of sf6 from the jobs must be constinuously monitored.
It Requires Special Transportation & MainTaining of the Quality of Gas.
The sf6 is heavier than oxygen & can cause disciculty in breakhing.
Recombination & reconditioning of the sf6 gas requires adDitional equipment.
Related Post: How TO WIRE An Afci Breaker? ARC FAULT CIRCUIT Interrupter Wiring
Vacuum Circuit Breaker (VCB)
. It is suitable for switching medium-voltage ranging from 22kv to 66 kv.
The Vacuum Chamber & Prevents Any Leak.
The high dielectric stringth to prevent arc re-stricying after the current zero.
It must have high electrical conDuctivity to Avoid Overheating upon normal load careaster.
It must have high thermal condition to disipate large heat product during arcing.
It should have high arc withstanding capabilities & low current chopping level.
It must have low density.
The Contracts are Made from Copper Aloy Such as Copper-BISMUTH, Copper-Lead, and Copper-Chromium Material.
Advantages of VCB
Vacuum is the absence of matter this vcb has no fire hazards
The Vacuum Has Very High Dielectric Streangth & Superior Arc Quenching Properties than Air & SF6.
Due to high dielectric stringth, vcb requires a small contact gap to exceeish the arc.
Vcb is compact & requests small install.
It is free of Maintenance this it is reliable having a long life.
It does not product any noise doing the operation.
There are no toXic exhaust jses.
Its operation is very fast.
It is suitable for repeated use.
It can break all types of faultcurrents.
Since there is a vacuum, the control mechaanism required power to move the controls.
Disadgantages of VCB
A Single Vacuum Interrupter Can only Interrupt up to 38kv.
For interupting voltages more than 38kv, multiple vacuum interuPters must be connected in series.
It ’s UNECONOMICAL for Voltages ExceeDing 38KV SINCE It Requires More than One VCB & The Total Cost Increases.
In case of loss of vacuum, the vcb becomers useless.
LOW VOLTAGE AC CIRCUIT BREAKER
Voltages are extinguishable. Lv Circuit Breakers Are Mostly Used For Residence & IndustRICATIONS.
Follow are some of the low voltage account:
Miniature Circuit Breaker (MCB)
MOLDED CASE CIRCUIT BREAKER (MCCB)
Residual Current Circuit Breaker (RCCB)
GFI or GFCI CIRCUIT BREAKER (GROUND FAULT CIRCUIT Interrupter)
ARC FAULT CIRCUIT Interrupter (AFCI)
Common trip (ganged) breakers
Magnetic Circuit Breakers
Thermal magnetic circuit breakers
Miniature Circuit Breaker (MCB)
Circuit 240/415 V AC HAVING A Wide Range of Current Ratings Below 125V.
For overloading. It is to make great the cb does not trying time with a momentary or starting of induction.
Mechanism as discussed earlier is of two types I.E.Tmal & Magnetic.
, It Heats Up & Starts Expanding Due to Which it bets & triggers the latch to select the controls.
Related Post: MCB (MINIATURE CIRCUIT BREAKER) -Construction, Working, Types & Useses
MOLDED CASE CIRCUIT BREAKER (MCCB)
The thermal Mechanism is used for overloading & magnetic is used for short circuit condition.
MCCB Can Have Fixed or Interchangeable Trip Unit. The Trip Unit is Responsible for Breaking the Contorys Upon Meeting Condition. It provides through the way:
Then, then
Short Circuit Must be interuplted in the shortest period of time postible. MCCB Can Trip screates up to 10K-200K AMPS in the Duration of 0.04 Seconds.
Manual switching
MCCB Can Also Act As a Manual Switch to Switch On/off the Power Supply to the Circuit. It can manually break the power support in case of emintenance.
Related Posts:
Types of relateds
Types of SSR Relays
Advantages of McCB
MCCB has an adjustable trip setting.
It can interrupt very largeurrents.
It has a movable trip unit.
It has a very small tripping time this fast switching during fault current.
It also offers remote on/off feature.
It has a compact design & takes less space.
Earth Leakage Circuit Breaker (ELCB)
Are use for proposition aganst electrical shock. They do not offer propection aging or short circuit. They must be used in the server in mcb.
There are two types of elcb;
VOLTAGE ELCB
Current ELCB (AKA RCCB)
The Current ELCB is renamed as RCCB.
VOLTAGE ELCB
Electrical Shock Upon Touching It.
Related Posts:
Types of Switches
Types of fuses
Current ELCB (RCCB)
Group Wire or Through a Person’s Body Connected with the Group.
Currents is Called Residual Current. When there is an import in the city, the residual carrent Will trip the Circuit Breaker.
Type AC RCCB
Such Type of RCCB Is Sensitive to only Alternating Current & Cannot Offer Protection Against DC or Any Other WaveForm.
Type a RCCB
Such type of rccb is sarstive to ac as one pulsating dc or square waveform
Type B RCCB
Such type of rccb offers protes protes aginst ancu up to 1000Hz, pulsating dc as well as smooth dc.
Limitations of RCCB
It Does Not Offer Protection Against Overloading & Short Circuit.
It does not proterct against line-to-neutral electrical shock.
It is a jenStive to only Specific WaveForms & Does Not Guarantee to Protect from Other WaveForms.
Related Post: Electronic Circuit Breaker – Schematic and Working
Residual Current Breaker with Overcurrent (RCBO)
Residual Current: It is the imbalance in the current between live & neutral wire due to the leakage of current to the group. RCBO Office.
Overcurrent: Overcurrent Means when the current exceeds itemit. It occurs day to two reasons: overloading & short circuit.
Overloading: It Occurs Due to HUGE CURRENT DRAW ABOVE Rated Current for A Prolonged Duration that Can Damage the Wiring as the Components.
SHORT CIRCUIT: It Occurs when the live & Neutral Wire Comes Into Direct Contory with Each Other. There is a huge amount of Current Flow that can damage energy equipment.
The RCBO Offers Protection Against Both Types of Fault that is Offered Individually by RCCB & MCB.
Related Posts:
Types of Inductors
Types of Resistors
Types of Capacitors
ARC FAULT CIRCUIT Interrupter (AFCI) Circuit Breaker
To Property & Life. The Afci Breaks The Circuit Upon Sensing Any Arc in the Connected Circuit.
Electronic Equipment.
Prevent the first arc. Although it can present the one that follow & avoid a portential fire hazard.
Common trip (ganged) circuit breakrs
-PhaSe System WHERE A FAULT in A Single Phase Must Break The Power Supply to All the Phases. It is all used for increasing thecrent racings of a cb by reporting it in parallellly.
Related Post: why Circuit Breaker CapaCity was rated in MVA and Now in Ka and KV?
Types of Circuit Breaker Based on ITS Tripping Curve
Circuit Breakers Can Be Classified Into 5 Types Based on their Tripping Characteristics & Instantaneous Tripping Current.
Type B Circuit Breaker
ToLerate Low Surge Current. They Are Suitable for Resistive Loads in Residential Applications Such As Lighting & Other Resistive Elements.
Type Circuit Breaker
Type D Circuit Breaker
applications.
Type K Circuit Breaker
Such Type of McB Instantly Trips at 8 TO 12 TIMES Rated Current. They are used for heavy inductive loads userd in data.
Type Z Circuit Breaker
Quench The Arc Much Easily. DC Does Not Have Such A Natural Zero Currents So Much Harder to Quench The Arc.
DC Circuit Breaker used that public to lengthen it & make it easy. However, there are low voltage,
Related Post: Smart Wifi Circuit Breaker -Construction, Installation and Working
HVDC CIRCUIT BREAKER
HVDC Stands for High Voltage Direct Current. It is use for saving & protrly breaking & protarcting aginst fault currents in HVDC Circuits.
In order to break the circuit und fault conditions & safly queench the arc in hvdc cb, the follow sTEPS MUST BeENSURD
Creation of Artificial Zero Crossing
Disablement of the stated Energy Inside the LC Circuit
Withstanding the voltage between its contact
Prevention of Arc Restriking
Direction Bringing the Current to Zero. At this point, the contacts are sitting & the arc is queenched at the zerourorrent.
Related Post: HVDC Circuit Breaker -Types, Working and Applications
The Circuit Breaker can be classified base on the localization of the installation.
Indoor Circuit Breakers
As the name suggets, such breakers are designed for indoor use inside buildings. They has a weather-resisionant enClosure. They are designed to operate at lowIEDIEDIED VOEDAS.
Outdoor Circuit Breakers
Such Type of Circuit Breaker is Designed to Withstand the Harsh Environment Outdoor. Their Outr Cover is Relacted to Withstand the Extreme Environment, Wear & Tear.
Dead tank circuit breakers
The Insulated Bushings are used for like line & load connections that all allow mounting of bushing can transformer on the reduce further count.
Live Tank Circuit Breakers
Such CBS can be used in server to operate at a higher voltage at a Reduced Cost. However, it requires sitaPate CTS, UNLIKE DEAD TATAT Can Utilizer Bushing CT.
Related post:
Types of Microprocessors & Their Applications
Types of MicroController & Their Applications
Based on the Operating Mechanis used for tripping the circuit, CB can be divided into the following types.
Spring -PERATED CIRCUIT BREAKER
PneuMatic-Operating Circuit Breaker
PNEUMATIC CIRCUIT BREAKER USES Compressed Air For Actuating ITS CONTACTS. Air Compressor Compresses the Air & Stores It Inside a Tank Which IS Release Upon Signal CHAGNAL MATOREAKRALALERALARARARARARARRARARARARARARAERAAAAEEAAAAEAAAEAAEEEREAERREEREREERREERE andERE andERE andE
Hydraulic-operated circuit breaker
Hydraulic Circuit Breaker Uses Piston & Hydraulic Fluid to Actuate its Contracts.
Magnetic-operated Circuit Breaker
Such CB USES An Electromagnet or A Solenoid to Produce A Magnetic Field WHICH IS USEd for Pulling The Latch that Holds The Spring etc..
Magnetic-Hydraulic Circuit Breaker
Such CB Use Both Features of Magnetic & Hydraulic CB to Perform the Tripping Action.
Related Post: Fuse, Circuit Breaker and Protection Symbols
Motor Protection Circuit Breaker (MPCB)
LINE FAULT: MPCB Protects The Motor from Short Circuits, LINE-TO-GROUND & Line-LINE FAULT. It Immediaately Breaks the Supply These Faults.
Overloading: Drawing Excess Amount of Currential Rated-Current is Called Overloading, It can damage the windings. MPCB Protes from Overloading & It can be adjusted.
Theermal delay: Overloading Heats up the Windings Thus It is Newsry to WAIT for It to cool down Before RESTATING It. MPCB offers adjustable thermal delay.
Unbalanced Phase: MPCB Offers Protections Against An unbalanced 3-PHASEM or A Phase Loss that Can CAUSE DAMAGE to the Motor.
. It is also used for isolating the power support to the motor for maIntennce Purposes.
Related Post: How to Wire 120V & 240V Main Panel? Circuit Breaker Box Installation
Automotive Circuit Breakers Just Like Normal CBS Are used for Protection Against Fault Current In Vehicles. They Are Classified Into the Follow Types Based MemEret Memmed MESET MES
Type 1 Automatic Reset CB
Type 2 Manual Reset CB
Then, then
Type 3 Push-TO-TRIP CB
High Current Application.