Circuit Breaker
A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected.Learn everything related to circuit breaker from this page.
Types of Circuit Breaker
Air Blast Circuit Breaker – Construction, Working and Types
Air blast circuit breaker employs a high-pressure air blast as...
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Different Types of Circuit Breakers
A circuit breaker is a switching device which can be...
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GFCI (Ground Fault Circuit Interrupter) – Working, Types, Installing and Troubleshooting
A ground fault circuit interrupter (GFCI or GFI) is an inexpensive...
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MCB (Miniature Circuit Breakers) – Types, Working and Trip Curves
What is MCB? MCB or Miniature Circuit Breaker is an electromechanical...
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Moulded Case Circuit Breaker (MCCB) – Types and Working
Moulded Case Circuit Breaker is an electromechanical device which protects...
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Oil Circuit Breakers – Types, Working and Construction
Save In oil circuit breakers, some insulating oil (e.g., transformer...
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SF6 Circuit Breakers – Construction, Types and Working
Save In an SF6 Circuit breaker, sulphur hexafluoride gas is used...
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Vacuum Circuit Breaker (VCB) – Principle, Construction and Working
What is VCB? VCB stands for Vacuum Circuit Breaker. In...
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Working of Air Circuit Breakers
What is an ACB? A circuit breaker in which the...
Read MoreMore Articles about Circuit Breaker
Substation Earthing System Design
Save We have already given an introduction to substation earthing system in an article published earlier. Today we are going
Transformer Oil – Tests and Purification Methods
What is Transformer Oil? Transformer oil is mineral insulating oil derived from crude petroleum. It is a mixture of various
Function of Protective Relays in Power System
Save We usually think of an electric power system in terms of its more impressive parts – the big generating stations,
Circuit Breaker Working Principle and Arcing Phenomenon
As the name indicates, the circuit breaker means the device which breaks (Open) the circuit under the abnormal condition and
Square D QO Circuit Breakers
Save QO stands for Qwik-Open. Square D QO Circuit Breakers are fastest tripping circuit breakers at 1/60th of a second.
Circuit Breaker Ratings
The rating of circuit breaker is given according to the duties that are performed by it. For complete specifications, standard
Circuit Breakers – Objective Questions – Part 2
Part 1Part 2Part 3Part 4Part 5 16. Out of the following circuit breakers, which one has the lowest voltage
Working of Air Circuit Breakers
What is an ACB? A circuit breaker in which the contacts open and close in the air at atmospheric pressure
What are Protective Relays? | Types and Working
What is a Protective Relay? The protective relay was invented more than 160 years ago. During the last 60 years,
Vacuum Circuit Breaker (VCB) – Principle, Construction and Working
What is VCB? VCB stands for Vacuum Circuit Breaker. In vacuum circuit breakers, the vacuum is used as the arc
Basic Types of Switchgear Components
Before learning about different switchgear components, let us understand what is switchgear. The apparatus used for switching, controlling and protecting
Transformer Bushing Types : RIP Bushing vs OIP Bushing
Save Transformer bushing types are categorized based on their material, manufacturing, and design mainly into the following types: OIP (Oil-Impregnated
Insulation Resistance Test (IR Test) or Megger Test
Insulation Resistance or IR Test is carried out by maintenance engineers to ensure the healthiness of the overall insulation system
Solid State Relays (Static Relays)
What is a Static Relay? There are two basic classifications of relays – Electromechanical Relays and Solid State Relays (Static
What is a FUSE and How it Works?
Save A fuse protects an electrical circuit or device from excessive current when a metal element inside it melts to create
Low Voltage Switchgear
Save As per IEC 60947, switchgears with rated voltages up to 1000 V ac and 1500 V dc are termed
Air Blast Circuit Breaker – Construction, Working and Types
Air blast circuit breaker employs a high-pressure air blast as an arc quenching medium. The construction and working of different
Types of Electrical Relays
Save We have already discussed the working of electrical relays. Now we are going through different types of electrical relays.
Capacitor Voltage Transformer (CVT or CCVT) – Construction & Working
Capacitor Voltage Transformer (CVT) or Capacitor Coupled Voltage Transformer (CCVT) is a switchgear device used to convert high transmission class
Electrical Substation: Equipment, Types, Components & Functions
An electrical substation is an installation with electrical equipment capable of interrupting or establishing electrical circuits and changing the voltage,
What are Motor Control Centres?
The Motor Control Centre is used in general to describe combinations of enclosures, busbars, circuit breakers, power contactors, power fuses,
Circuit Breakers – Objective Questions – Part 1
Part 1Part 2Part 3Part 4Part 5 1. A circuit breaker is (A) power factor correcting device (B) a device
All Day Efficiency of Transformer
The ratio of output in kWh to the input in kWh of a transformer over a 24-hour period is known
Auto Reclosing of Power Lines and Types of Faults
Save The goal of the auto reclosing in power lines is to restore the line to service as quickly as