Circuit breaker(encrypted)
•
9 likes•3,282 views
This presentation discusses the basics of circuit breakers and their types. It begins by defining a circuit breaker as a switching device that can operate manually or automatically to control and protect electrical power systems. It then discusses the components of circuit breakers including fixed and moving contacts. Different methods of arc interruption are presented, including using high resistance and utilizing the natural zero of AC waves. Principles of air break circuit breakers are explained, along with types such as air blast and details on axial and cross blast designs. SF6 circuit breakers are also mentioned.
Report
Share
Report
Share
Download to read offline
Recommended
ABCB(air blast circuit breaker)
This document provides an overview of air blast circuit breakers. It discusses that air blast circuit breakers use compressed air to extinguish arcs during opening of contacts. The document classifies air blast circuit breakers into axial blast, cross blast, and radial blast types based on the direction of the air blast. It also describes the construction, operation, advantages, disadvantages, applications, and future perspectives of air blast circuit breakers.
Air Circuit breaker
This document provides information about an electrical circuit breaker project conducted by 4th year electrical engineering students at Benha University in Egypt. It lists the names and student numbers of 4 students involved in the project, with student numbers ranging from 73 to 138. The rest of the document discusses the basic working principles of electrical circuit breakers, including their components, operating mechanisms, types according to various classification schemes, and arc quenching technologies.
Circuit breaker
A circuit breaker is a device that breaks an electrical circuit automatically or manually under normal, full load, or short circuit conditions. It contains two contacts that remain closed during normal operation. When a fault occurs, a trip coil is energized separating the contacts. An arc is struck during contact separation, allowing current to continue briefly. Circuit breakers must extinguish the arc quickly. Different types of circuit breakers use various methods and mediums like oil, air, vacuum, or sulfur hexafluoride gas to rapidly extinguish the arc. Circuit breakers are classified and selected based on the voltage level and intended application.
Circuit breaker arc phenomena
A circuit breaker is a device used to protect electrical circuits from damage caused by short circuits or overloads. It functions by automatically opening a circuit when excess current is detected. When a fault occurs, the circuit breaker detects it and uses stored mechanical energy to separate its contacts, interrupting the current. This creates an electric arc that must be contained and extinguished in a controlled way before the contacts can be re-closed to restore power. Common circuit breaker components detect faults, open contacts, extinguish arcs through techniques like lengthening or splitting it, and reclose contacts once faults have cleared.
Circuit breakers
Circuit breakers are used to break electric circuits either manually or automatically during faults. When contacts open under a fault, an arc is produced which must be quickly extinguished. There are two main methods: the high resistance method increases arc resistance over time to reduce current below the level needed to sustain the arc, such as by lengthening, cooling, or splitting the arc. The low resistance or current zero method keeps arc resistance low until current reaches zero, then rapidly deionizes the medium between contacts to prevent the arc from restarting when voltage rises again.
Air circuit breakers
Every power supply depends upon a reliable infeed of electricity. Air circuit breakers reliably protect electrical installations against damage or fire as a result of short circuits, ground faults, or overload faults.
Circuit breaker, Types of circuit breaker & different CB related questions
Circuit Breaker
Types of Circuit Breaker with different aspects
Difference between Isolator & CB
Braking capacity of CB
Over current & Over load
Air circuit breaker (ACB) Low-Voltage Miduim-Voltage High Voltage
Air Circuit Breaker, is the application use full in low voltage for the main switch gear. easy to quench the arc and long life varrenty. but for high voltage is completly replace by oil circuit breaker. It mainly 2 types of ACB are Plain Aircircuit Breaker and Air-blash Air Circuit Breaker. Plain Aircircuit Breaker mostly use in Low and Miduim Voltage and Air-Blash Air Circuit Breaker is mostly use in high voltage.
Thanks.
Recommended
ABCB(air blast circuit breaker)
This document provides an overview of air blast circuit breakers. It discusses that air blast circuit breakers use compressed air to extinguish arcs during opening of contacts. The document classifies air blast circuit breakers into axial blast, cross blast, and radial blast types based on the direction of the air blast. It also describes the construction, operation, advantages, disadvantages, applications, and future perspectives of air blast circuit breakers.
Air Circuit breaker
This document provides information about an electrical circuit breaker project conducted by 4th year electrical engineering students at Benha University in Egypt. It lists the names and student numbers of 4 students involved in the project, with student numbers ranging from 73 to 138. The rest of the document discusses the basic working principles of electrical circuit breakers, including their components, operating mechanisms, types according to various classification schemes, and arc quenching technologies.
Circuit breaker
A circuit breaker is a device that breaks an electrical circuit automatically or manually under normal, full load, or short circuit conditions. It contains two contacts that remain closed during normal operation. When a fault occurs, a trip coil is energized separating the contacts. An arc is struck during contact separation, allowing current to continue briefly. Circuit breakers must extinguish the arc quickly. Different types of circuit breakers use various methods and mediums like oil, air, vacuum, or sulfur hexafluoride gas to rapidly extinguish the arc. Circuit breakers are classified and selected based on the voltage level and intended application.
Circuit breaker arc phenomena
A circuit breaker is a device used to protect electrical circuits from damage caused by short circuits or overloads. It functions by automatically opening a circuit when excess current is detected. When a fault occurs, the circuit breaker detects it and uses stored mechanical energy to separate its contacts, interrupting the current. This creates an electric arc that must be contained and extinguished in a controlled way before the contacts can be re-closed to restore power. Common circuit breaker components detect faults, open contacts, extinguish arcs through techniques like lengthening or splitting it, and reclose contacts once faults have cleared.
Circuit breakers
Circuit breakers are used to break electric circuits either manually or automatically during faults. When contacts open under a fault, an arc is produced which must be quickly extinguished. There are two main methods: the high resistance method increases arc resistance over time to reduce current below the level needed to sustain the arc, such as by lengthening, cooling, or splitting the arc. The low resistance or current zero method keeps arc resistance low until current reaches zero, then rapidly deionizes the medium between contacts to prevent the arc from restarting when voltage rises again.
Air circuit breakers
Every power supply depends upon a reliable infeed of electricity. Air circuit breakers reliably protect electrical installations against damage or fire as a result of short circuits, ground faults, or overload faults.
Circuit breaker, Types of circuit breaker & different CB related questions
Circuit Breaker
Types of Circuit Breaker with different aspects
Difference between Isolator & CB
Braking capacity of CB
Over current & Over load
Air circuit breaker (ACB) Low-Voltage Miduim-Voltage High Voltage
Air Circuit Breaker, is the application use full in low voltage for the main switch gear. easy to quench the arc and long life varrenty. but for high voltage is completly replace by oil circuit breaker. It mainly 2 types of ACB are Plain Aircircuit Breaker and Air-blash Air Circuit Breaker. Plain Aircircuit Breaker mostly use in Low and Miduim Voltage and Air-Blash Air Circuit Breaker is mostly use in high voltage.
Thanks.
Circuit Breaker
A PERFECT PRESENTATION SHOWING DIFFEERENT TYPES OF CIRCUIT BREAKERS
1.ITS USES
2.ITS ADVANTAGES
3. WHERE IT IS USED
Circuit breaker
The document discusses different types of circuit breakers, their origins, operations, and uses. It begins by introducing circuit breakers and their basic functions of fault detection and current interruption. It then discusses the early development of circuit breakers by Thomas Edison in 1879 and the modern miniature circuit breaker patented in 1924. The remainder of the document describes the operations, components, applications, advantages, and disadvantages of various low voltage, medium voltage, high voltage, magnetic, thermal-magnetic, common trip, disconnecting, sulfur hexafluoride, vacuum, and carbon dioxide circuit breakers.
Switchgear and protection lecture 2 type of circuit breakers and applications
A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow.
Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. Circuit breakers are made in varying sizes, from small devices that protect an individual household appliance up to large switchgear designed to protect high voltage circuits feeding an entire city.
https://www.youtube.com/channel/UC2SvKI7eepP241VLoui1D5A
Circuit breakers
This document summarizes a seminar on circuit breakers. It discusses the working principles of circuit breakers, including arc phenomenon and methods of arc extinction. It also covers terms related to circuit breakers and different types of circuit breakers such as oil, air blast, sulfur hexafluoride, and vacuum circuit breakers. For each type, it provides details on principles of operation, advantages, disadvantages, and applications. The document concludes that the seminar helped gather new information about circuit breakers and their role in power systems.
Circuit breaker presentation
A circuit breaker is a device that breaks an electrical circuit automatically or manually under normal, full, or short circuit conditions. When a fault occurs, the trip coil is energized and separates the contacts, extinguishing the arc through various methods. Common types of circuit breakers include oil, air blast, SF6, and vacuum. Oil circuit breakers use oil as an insulating medium but have disadvantages like fire risk. Vacuum circuit breakers use vacuum as the insulating medium and have the highest insulation strength. SF6 circuit breakers use sulfur hexafluoride gas which effectively absorbs electrons to extinguish arcs and are commonly used for high power and voltage applications.
Circuit breaker
This document provides an overview of circuit breakers, including their operating principles, components, and classifications. Circuit breakers are mechanical switching devices that open and close electrical circuits under normal and abnormal conditions. They contain fixed and moving contacts to carry current when closed. When a fault occurs, the contacts separate, creating an arc that must be extinguished quickly. Circuit breakers use various insulating fluids or methods to cool the arc and reduce its conduction in order to interrupt the current. Common types include oil, air, sulfur hexafluoride, and vacuum circuit breakers.
Study of circuit breakers
This presentation gives the simple understanding of all circuit breakers used in thermal power plants for different operating voltages.
Circuit breaker
A circuit breaker is a device that breaks an electrical circuit automatically or manually under normal, full, or short circuit conditions. It contains two contacts that remain closed under normal operation but separate when a fault is detected, interrupting the current. When the contacts separate, an arc is struck but extinguished quickly by the circuit breaker. Common types of circuit breakers include oil, air blast, SF6, and vacuum circuit breakers. SF6 circuit breakers use sulfur hexafluoride gas to rapidly absorb electrons from the arc when contacts open, building insulation to extinguish the arc. They have advantages over oil circuit breakers like shorter arcing time, ability to interrupt larger currents, noiseless operation, and lower maintenance needs
Air Blast & SF6 Circuit Breaker Design and Construction
A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow.
Circuit Breakers
Circuit Breakers, types of Circuit Breakers, comparison, operation of Circuit Breakers,
switch gears. protection, Isolator,
vacuum CBs
A circuit breaker breaks an electrical circuit automatically or manually under all load conditions. A vacuum circuit breaker uses vacuum as an insulating and arc-quenching medium. It contains fixed contacts, moving contacts, and an arc shield housed inside a vacuum chamber. When the contacts open, an arc is produced but quickly extinguished in the vacuum environment, allowing for fast interruption of electric current. Vacuum circuit breakers are compact and reliable with long life, used for outdoor applications from 22kV to 66kV.
Er. rahul sharma circuit breaker
This document provides an overview of different types of circuit breakers presented by Er. Rahul Sharma. It discusses AC and DC circuit breakers, as well as classifications based on rated voltage and medium of arc extinction. Specific circuit breaker types covered include oil circuit breakers (plain break, self-blast, minimum oil, vacuum), air blast circuit breakers, and their operating principles. Key advantages and applications of each type are highlighted.
Circuit Breaker
This document summarizes different types of circuit breakers. It describes miniature circuit breakers (MCB) rated up to 100 amps and molded case circuit breakers (MCCB) rated up to 1000 amps. Thermal magnetic circuit breakers respond to overloads using a bimetallic strip and short circuits using an electromagnet. Medium and high voltage circuit breakers above 1kV and 72.5kV respectively use various mediums like vacuum, air, SF6 or oil to extinguish arcs. Sulfur hexafluoride circuit breakers surround contacts with SF6 gas. Common trip breakers ensure all live conductors are interrupted.
Seminar on circuit breaker
The document discusses different types of circuit breakers, including air blast, vacuum, oil, and SF6 circuit breakers. It explains that a circuit breaker breaks a circuit manually or automatically under various load conditions. The operating mechanism involves two contacts that separate when a trip coil is energized during a fault. Different circuit breakers use various mediums like oil, air, vacuum, or SF6 gas to quench the arc formed during contact separation. Modern circuit breakers widely use vacuum or SF6 breakers due to their reliable and fast operation.
CIRCUIT BREAKER ON GSS
The document discusses different types of circuit breakers used in electrical engineering. It describes oil circuit breakers, including bulk oil and minimum oil circuit breakers. Air blast circuit breakers extend the arc to quickly extinguish it. Vacuum circuit breakers maintain a high vacuum to interrupt arcs using minimal components. SF6 circuit breakers use sulfur hexafluoride gas, which has high dielectric strength and acts as an insulating and arc-quenching medium. The document provides details on the working, advantages, and disadvantages of each circuit breaker type.
2017 2 tutorial-ac_hv_circuit_breakers_dufournet
This document provides an overview of AC high-voltage circuit breakers. It discusses different types of circuit breakers including AIS, GIS, dead tank, and generator circuit breakers. It also covers rated characteristics such as rated maximum voltage and rated short-circuit making and breaking current. Additionally, the document discusses advantages of using SF6 gas and alternatives to SF6 being explored, such as the g3 gas mixture. The content is organized into sections covering topics such as arcing phenomena, arc extinction principles, switching duties, and standards.
SF6 Circuit breaker by Khalid, NIT Warangal 2014 Batch
The adoption of SF6 in switchgear for all operating conditions has brought advantages in performance , size, weight, global cost and reliability.
Circuitbreaker HIGH VOLTAGE CIRCUIT
The document discusses different types of circuit breakers including air blast, vacuum, oil, and SF6 circuit breakers. It explains that a circuit breaker consists of two contacts - a fixed contact and a moving contact. The moving contact opens and closes the circuit using stored energy. It also describes how each type of circuit breaker extinguishes the electric arc that forms during opening of the contacts using different mediums like air, vacuum, oil or SF6 gas. The document concludes that vacuum and SF6 circuit breakers are commonly used today due to their reliable and fast operation.
High voltage circuit breakers
It describes about the circuit breaker and components and types of high voltage circuit breaker. It also explains about the working principle of the circuit breaker.
Get Complete Information about Circuit Breaker
A circuit breaker is equipment that breaks a circuit either manually or automatically under all conditions at no load, full load or short circuit.
Circuit breaker
The document discusses different types of circuit breakers, including air blast, vacuum, oil, and SF6 circuit breakers. It explains that a circuit breaker can make, carry, and break currents under normal and abnormal circuit conditions. The operating mechanism involves using stored energy to move a moving contact to open or close the circuit. When contacts separate during a fault, an arc is formed that must be quickly quenched for circuit interruption. Each breaker type uses a different medium, such as air, vacuum, oil or SF6 gas, to rapidly cool and extinguish the arc. Modern systems commonly use vacuum or SF6 breakers for their fast, reliable performance.
More Related Content
What's hot
Circuit Breaker
A PERFECT PRESENTATION SHOWING DIFFEERENT TYPES OF CIRCUIT BREAKERS
1.ITS USES
2.ITS ADVANTAGES
3. WHERE IT IS USED
Circuit breaker
The document discusses different types of circuit breakers, their origins, operations, and uses. It begins by introducing circuit breakers and their basic functions of fault detection and current interruption. It then discusses the early development of circuit breakers by Thomas Edison in 1879 and the modern miniature circuit breaker patented in 1924. The remainder of the document describes the operations, components, applications, advantages, and disadvantages of various low voltage, medium voltage, high voltage, magnetic, thermal-magnetic, common trip, disconnecting, sulfur hexafluoride, vacuum, and carbon dioxide circuit breakers.
Switchgear and protection lecture 2 type of circuit breakers and applications
A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow.
Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. Circuit breakers are made in varying sizes, from small devices that protect an individual household appliance up to large switchgear designed to protect high voltage circuits feeding an entire city.
https://www.youtube.com/channel/UC2SvKI7eepP241VLoui1D5A
Circuit breakers
This document summarizes a seminar on circuit breakers. It discusses the working principles of circuit breakers, including arc phenomenon and methods of arc extinction. It also covers terms related to circuit breakers and different types of circuit breakers such as oil, air blast, sulfur hexafluoride, and vacuum circuit breakers. For each type, it provides details on principles of operation, advantages, disadvantages, and applications. The document concludes that the seminar helped gather new information about circuit breakers and their role in power systems.
Circuit breaker presentation
A circuit breaker is a device that breaks an electrical circuit automatically or manually under normal, full, or short circuit conditions. When a fault occurs, the trip coil is energized and separates the contacts, extinguishing the arc through various methods. Common types of circuit breakers include oil, air blast, SF6, and vacuum. Oil circuit breakers use oil as an insulating medium but have disadvantages like fire risk. Vacuum circuit breakers use vacuum as the insulating medium and have the highest insulation strength. SF6 circuit breakers use sulfur hexafluoride gas which effectively absorbs electrons to extinguish arcs and are commonly used for high power and voltage applications.
Circuit breaker
This document provides an overview of circuit breakers, including their operating principles, components, and classifications. Circuit breakers are mechanical switching devices that open and close electrical circuits under normal and abnormal conditions. They contain fixed and moving contacts to carry current when closed. When a fault occurs, the contacts separate, creating an arc that must be extinguished quickly. Circuit breakers use various insulating fluids or methods to cool the arc and reduce its conduction in order to interrupt the current. Common types include oil, air, sulfur hexafluoride, and vacuum circuit breakers.
Study of circuit breakers
This presentation gives the simple understanding of all circuit breakers used in thermal power plants for different operating voltages.
Circuit breaker
A circuit breaker is a device that breaks an electrical circuit automatically or manually under normal, full, or short circuit conditions. It contains two contacts that remain closed under normal operation but separate when a fault is detected, interrupting the current. When the contacts separate, an arc is struck but extinguished quickly by the circuit breaker. Common types of circuit breakers include oil, air blast, SF6, and vacuum circuit breakers. SF6 circuit breakers use sulfur hexafluoride gas to rapidly absorb electrons from the arc when contacts open, building insulation to extinguish the arc. They have advantages over oil circuit breakers like shorter arcing time, ability to interrupt larger currents, noiseless operation, and lower maintenance needs
Air Blast & SF6 Circuit Breaker Design and Construction
A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow.
Circuit Breakers
Circuit Breakers, types of Circuit Breakers, comparison, operation of Circuit Breakers,
switch gears. protection, Isolator,
vacuum CBs
A circuit breaker breaks an electrical circuit automatically or manually under all load conditions. A vacuum circuit breaker uses vacuum as an insulating and arc-quenching medium. It contains fixed contacts, moving contacts, and an arc shield housed inside a vacuum chamber. When the contacts open, an arc is produced but quickly extinguished in the vacuum environment, allowing for fast interruption of electric current. Vacuum circuit breakers are compact and reliable with long life, used for outdoor applications from 22kV to 66kV.
Er. rahul sharma circuit breaker
This document provides an overview of different types of circuit breakers presented by Er. Rahul Sharma. It discusses AC and DC circuit breakers, as well as classifications based on rated voltage and medium of arc extinction. Specific circuit breaker types covered include oil circuit breakers (plain break, self-blast, minimum oil, vacuum), air blast circuit breakers, and their operating principles. Key advantages and applications of each type are highlighted.
Circuit Breaker
This document summarizes different types of circuit breakers. It describes miniature circuit breakers (MCB) rated up to 100 amps and molded case circuit breakers (MCCB) rated up to 1000 amps. Thermal magnetic circuit breakers respond to overloads using a bimetallic strip and short circuits using an electromagnet. Medium and high voltage circuit breakers above 1kV and 72.5kV respectively use various mediums like vacuum, air, SF6 or oil to extinguish arcs. Sulfur hexafluoride circuit breakers surround contacts with SF6 gas. Common trip breakers ensure all live conductors are interrupted.
Seminar on circuit breaker
The document discusses different types of circuit breakers, including air blast, vacuum, oil, and SF6 circuit breakers. It explains that a circuit breaker breaks a circuit manually or automatically under various load conditions. The operating mechanism involves two contacts that separate when a trip coil is energized during a fault. Different circuit breakers use various mediums like oil, air, vacuum, or SF6 gas to quench the arc formed during contact separation. Modern circuit breakers widely use vacuum or SF6 breakers due to their reliable and fast operation.
CIRCUIT BREAKER ON GSS
The document discusses different types of circuit breakers used in electrical engineering. It describes oil circuit breakers, including bulk oil and minimum oil circuit breakers. Air blast circuit breakers extend the arc to quickly extinguish it. Vacuum circuit breakers maintain a high vacuum to interrupt arcs using minimal components. SF6 circuit breakers use sulfur hexafluoride gas, which has high dielectric strength and acts as an insulating and arc-quenching medium. The document provides details on the working, advantages, and disadvantages of each circuit breaker type.
2017 2 tutorial-ac_hv_circuit_breakers_dufournet
This document provides an overview of AC high-voltage circuit breakers. It discusses different types of circuit breakers including AIS, GIS, dead tank, and generator circuit breakers. It also covers rated characteristics such as rated maximum voltage and rated short-circuit making and breaking current. Additionally, the document discusses advantages of using SF6 gas and alternatives to SF6 being explored, such as the g3 gas mixture. The content is organized into sections covering topics such as arcing phenomena, arc extinction principles, switching duties, and standards.
SF6 Circuit breaker by Khalid, NIT Warangal 2014 Batch
The adoption of SF6 in switchgear for all operating conditions has brought advantages in performance , size, weight, global cost and reliability.
Circuitbreaker HIGH VOLTAGE CIRCUIT
The document discusses different types of circuit breakers including air blast, vacuum, oil, and SF6 circuit breakers. It explains that a circuit breaker consists of two contacts - a fixed contact and a moving contact. The moving contact opens and closes the circuit using stored energy. It also describes how each type of circuit breaker extinguishes the electric arc that forms during opening of the contacts using different mediums like air, vacuum, oil or SF6 gas. The document concludes that vacuum and SF6 circuit breakers are commonly used today due to their reliable and fast operation.
High voltage circuit breakers
It describes about the circuit breaker and components and types of high voltage circuit breaker. It also explains about the working principle of the circuit breaker.
Get Complete Information about Circuit Breaker
A circuit breaker is equipment that breaks a circuit either manually or automatically under all conditions at no load, full load or short circuit.
What's hot (20)
Switchgear and protection lecture 2 type of circuit breakers and applications
Switchgear and protection lecture 2 type of circuit breakers and applications
Air Blast & SF6 Circuit Breaker Design and Construction
Air Blast & SF6 Circuit Breaker Design and Construction
SF6 Circuit breaker by Khalid, NIT Warangal 2014 Batch
SF6 Circuit breaker by Khalid, NIT Warangal 2014 Batch
Viewers also liked
Circuit breaker
The document discusses different types of circuit breakers, including air blast, vacuum, oil, and SF6 circuit breakers. It explains that a circuit breaker can make, carry, and break currents under normal and abnormal circuit conditions. The operating mechanism involves using stored energy to move a moving contact to open or close the circuit. When contacts separate during a fault, an arc is formed that must be quickly quenched for circuit interruption. Each breaker type uses a different medium, such as air, vacuum, oil or SF6 gas, to rapidly cool and extinguish the arc. Modern systems commonly use vacuum or SF6 breakers for their fast, reliable performance.
Circuit breakers
A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.
Its basic function is to detect a fault condition and, by interrupting continuity, to immediately discontinue electrical flow.
Electronic switch control through rf
This document describes an electronic switch control system using radio frequency (RF) communication. A group of four students designed a remote control that can operate home appliances like fans and lights without a microcontroller. The remote contains an encoder and ASK transmitter that sends RF signals when buttons are pressed. A receiver with a decoder receives the signals and uses flip-flops and a transistor to control a relay and appliance. The system allows remote control of appliances from up to 8 meters away. Key components include HT12E/HT12D encoder/decoder chips, an ASK transmitter and receiver operating at 433MHz, and a relay to switch household power.
151080106005 2110005
This document summarizes elements of electrical engineering, specifically circuit breakers. It discusses miniature circuit breakers (MCBs), how they work through thermal and electromagnetic effects to protect circuits from overloads or shorts. MCBs are commonly used in home electrical panels and appliances due to their safety compared to fuses. The document also covers earth leakage circuit breakers (ELCBs), which detect stray voltages and interrupt circuits to prevent electric shocks, and their use in electrical installations with high earth impedance.
Introduction to fm modulation
Frequency modulation (FM) varies the carrier frequency within a small range based on the information signal. The peak frequency deviation (Df) is the farthest the FM signal can be from the original carrier frequency (fc). The modulation index (β) represents Df as a multiple of the maximum modulating frequency (fm), with Df = βfm. The FM spectrum has multiple sidebands separated by the modulating frequency on either side of the carrier frequency, with the extent of sidebands approximately (β + 1)fm above and below fc.
Am Receiver (Hardware Based)
This document summarizes a semester project to design an AM receiver. A team of 4 students - Hamza Nawaz, Muzzafar Ahmad, Muhammad Junaid, and Naveed Ahmed - presented their mid-evaluation to Dr. Mehboob Ur Rehman and Mr. Waseem Abbas. The project involved designing an AM receiver using knowledge of communication systems. Key components discussed include the tuner circuit, RF amplifier, demodulator, and audio amplifier. Block diagrams and simulation results were provided. The goal was to understand and implement an AM receiver.
J A Stein
Joseph Allen Stein was an American architect who worked in India for over 50 years. Some key works include the Indian Habitat Centre in New Delhi, which features a continuous roof space frame and balances blue, green, and red colors. At the American International School, he used folded steel lattice vaulting at the classrooms. His industrial buildings for Escorts Limited featured different shell configurations like barrel vaults and hyperbolic domes. Throughout his career, Stein focused on creating modern regionalist designs that blended local materials and responded to each site's landscape, climate, and culture.
Amplitude modulation
Analog modulation involves representing analog information as an analog signal. It is needed when the transmission medium is bandpass in nature or only a bandpass channel is available. There are three main types of analog modulation: amplitude modulation (AM), which changes the amplitude of the carrier signal; frequency modulation (FM), which changes the frequency; and phase modulation (PM), which changes the phase. AM encodes the modulating signal as variations in the envelope of the carrier signal. This results in a spectrum with the carrier frequency flanked by upper and lower sidebands. The bandwidth required is twice that of the modulating signal.
protection for power system
The document discusses power system protection, including an overview of electrical energy systems, types of protection like apparatus and system protection, the evolution of relays from electromechanical to solid state to numerical relays, and the role of circuit breakers in interrupting current flow upon a relay command.
J.A.Stein
Joseph Allen Stein was an American architect who established a regional modern architecture style in India. He is notable for designing several important buildings in Delhi, including the Indian Habitat Center complex and the Triveni Kala Sangam arts center. Stein believed in creating buildings that blended with their natural surroundings through the use of local materials, passive design, and consideration of climate and culture. His works emphasized simplicity and relationships between a building and its landscape.
Amplitude modulation
Amplitude modulation (AM) is a modulation technique where the amplitude of a carrier wave is varied in proportion to that of the message signal being transmitted. In AM, the amplitude of the carrier wave is modulated by the instantaneous amplitude of the lower frequency modulating signal. This results in a modulated wave whose amplitude varies in accordance with the modulating signal. The carrier frequency remains unchanged in AM. Demodulation of AM signals can be done using envelope detection or synchronous detection methods. Envelope detection is simpler but introduces more distortion, while synchronous detection is more complex but introduces less distortion.
Frank o. gehry
Frank Gehry is a renowned Canadian-American architect known for his innovative deconstructivist designs. Some of his most famous works include the Guggenheim Museum in Bilbao, Spain, which helped revitalize the city through its distinctive titanium cladding and irregular forms. The Gehry House in Santa Monica employed corrugated metal, wood, and chain-link fencing to wrap around and expand an existing home. The Disney Concert Hall in Los Angeles, praised for its acoustics, features a vineyard-style seating configuration within wood-paneled walls and a Douglas fir ceiling. Gehry's organic, sculptural designs break from strict grids and push architectural boundaries through unconventional shapes and materials.
9 Examples of the Inspiring Architecture of Zaha Hadid
Architect Zaha Hadid has designed several landmark buildings throughout the Middle East. Here are nine of her most iconic structures.
MCB And Earth Leakage Circuit
This document provides an overview of Miniature Circuit Breakers (MCBs) and Earth Leakage Circuit Breakers (ELCBs). It defines a circuit breaker and describes the types, including MCBs. It explains the construction, operation, and uses of MCBs. MCBs protect against overload and short circuits using magnetic and thermal trip units. The document also describes ELCBs, noting that they detect small stray voltages and interrupt circuits to prevent electric shock. ELCBs operate by detecting fault currents from live to earth and disconnecting power when a voltage is sensed across the sense coil.
Amplitude modulation
The document discusses amplitude modulation (AM) and different types of AM including double sideband AM (DSBAM), single sideband AM (SSBAM), and their modulation, demodulation, bandwidth requirements, and power considerations. It provides equations, diagrams, and explanations for DSBAM, SSBAM, and synchronous demodulation. Key aspects covered include the carrier signal, message signal, sidebands, modulation depth, spectrum analysis, and transmitter power efficiency comparisons between DSBAM and SSBAM.
Moulded Case Circuit Breaker (Mccb) & air circuit breaker (acb)
This document discusses Merlin Gerin's offerings of MCCBs and ACBs. For MCCBs, it introduces the Easypact range up to 100A and the Compact NS range from 100A to 3200A. For ACBs, it presents the Masterpact NT up to 1600A and Masterpact NW up to 6300A. It describes the performance, components, accessories, and control options of these circuit breaker families. It emphasizes innovations like current sensors, connectors, and Micrologic control units that provide flexibility, discrimination, and intelligence across the product lines.
Viewers also liked (20)
9 Examples of the Inspiring Architecture of Zaha Hadid
9 Examples of the Inspiring Architecture of Zaha Hadid
Moulded Case Circuit Breaker (Mccb) & air circuit breaker (acb)
Moulded Case Circuit Breaker (Mccb) & air circuit breaker (acb)
Similar to Circuit breaker(encrypted)
Circuit Breaker : Types
Circuit breakers are switching devices that can make, carry, and break electric currents under both normal and abnormal circuit conditions. They contain fixed and moving contacts that remain closed during normal operation but open automatically during faults to interrupt the fault current. When contacts open under fault conditions, an arc is produced that must be quickly extinguished. Different circuit breakers use various mediums like oil, air, vacuum, or SF6 gas to rapidly quench the arc through cooling and increasing dielectric strength between contacts. Common types of circuit breakers include oil, vacuum, air blast, and SF6 breakers that vary based on voltage level, switching speed, maintenance needs, and arc quenching method.
Circuit Breaker
This document discusses different types of circuit breakers and their operating principles. It describes how circuit breakers interrupt current by extinguishing the arc that forms between contacts. Vacuum circuit breakers use vacuum as the arc quenching medium, allowing for quick arc extinction due to rapid condensation. Sulfur hexafluoride circuit breakers use SF6 gas, which absorbs electrons from the arc. Air-blast circuit breakers employ high pressure air to cool and sweep away the arc.
UNIT IV Circuit Breaker.pptx
This document discusses various aspects of circuit breakers, including their design and operation. It describes how an arc is maintained between contacts during arcing periods and how factors like ionization, arc length and cross-section affect the arc resistance. It then discusses two main methods of arc extinction - the high resistance method which involves lengthening or cooling the arc, and the low resistance method which causes ionized particles to recombine. The document also covers topics like current chopping in air-blast circuit breakers, interruption of capacitive currents, classifications of circuit breakers, and the operation of different types of circuit breakers including oil, vacuum, SF6, and air blast.
arc phenomena and c.b.
The document discusses different types of switchgears used in power systems, including their definitions, examples, and working principles. It focuses on circuit breakers, describing four main types - oil circuit breakers, air-blast circuit breakers, SF6 circuit breakers, and vacuum circuit breakers. For each type, it provides details on the arc quenching medium used, construction, working, advantages and disadvantages. Key terms like arc voltage, restriking voltage and recovery voltage related to circuit breakers are also explained.
Protection & switchgear
This document provides information about a power system protection course, including:
1. The syllabus covers 5 units - introduction to protection schemes, operating principles of relays, apparatus protection, theory of circuit interruption, and circuit breakers.
2. The theory of circuit interruption unit discusses arc phenomena, interruption of DC and AC circuits. It explains the physics behind arc initiation, maintenance and methods of arc extinction.
3. Interruption of capacitive current can produce high transient voltages across the circuit breaker contacts. This occurs when unloaded transmission lines or capacitor banks are switched off.
Relay and switchgear protection
Relays sense abnormal voltage and current conditions and send signals to circuit breakers to isolate faulty parts of a power system. Electromagnetic induction relays use eddy currents produced in a disc to generate torque. There are different types of overcurrent and directional relays. Distance relays use impedance, reactance, or mho principles. Transformer and feeder protection uses overcurrent, distance, or pilot wire schemes. Circuit breakers use oil, air, sulfur hexafluoride, or vacuum to extinguish arcs and open faulty circuits. Instrument transformers reduce high voltages and currents to safer, measurable levels for meters and relays.
Switchgear Protection.pptx
Switchgear is electrical equipment used to control, protect, and isolate electrical systems. It includes components like fuses, switches, relays, and circuit breakers. There are three main types - low voltage, medium voltage, and high voltage. Circuit breakers use various mediums like air, sulfur hexafluoride gas, or oil to detect faults and quickly interrupt current to isolate issues and protect equipment. SF6 gas is commonly used due to its excellent insulating and arc quenching properties. Air blast circuit breakers use compressed air to extinguish arcs by forcing high velocity air jets onto the arc through nozzles.
Circuit Breaker arc phenomenon.pdf engineering
Different types of circuit breaker and ther applications
air type circuit breaker
This document provides information about circuit breakers. It begins by defining a circuit breaker as a switching device that can operate manually or automatically to control and protect electrical power systems by safely interrupting arcs during operation. It then discusses how modern power systems deal with huge currents and faults, requiring circuit breakers to quickly clear faults to avoid equipment damage. Finally, it explains that circuit breakers must reliably and safely disconnect and reconnect parts of the power system for control and protection purposes while carrying large currents.
Hv sytem overvolatge
High voltages can cause overvoltage events that exceed the design limits of electrical systems. There are two main types of overvoltage: lightning overvoltage from natural sources, and switching overvoltage caused by changing loads on a system. Lightning overvoltage occurs when a lightning strike induces high voltage in a system. Switching overvoltage happens when large inductive or resistive loads are connected or disconnected, causing voltage spikes. Both types of overvoltage can damage equipment and should be controlled through various techniques like resistors, phase control, and reactors. Uncontrolled overvoltages present a danger, so protection methods are important for system reliability and safety.
Air Blast Circuit Breaker(ABCB)_Switchgear & protection.pptx
This document discusses air blast circuit breakers (ABCBs). ABCBs use high pressure air blasts to extinguish electric arcs and interrupt current flow. They are classified into axial, cross, and radial blast types depending on the direction of the air blast. ABCBs operate by using a tripping impulse to open an air valve, releasing a blast of air to separate contacts and extinguish the electric arc, interrupting current. While able to rapidly extinguish arcs due to the air blast, ABCBs require maintenance of compressed air supplies and can be sensitive to voltage variations.
sam.pptx
The document discusses air blast circuit breakers, including their construction, working principles, types (cross blast and axial blast), and compressed air system. Air blast circuit breakers use compressed air to extinguish arcs and were commonly used for voltages from 11-1100kV. They have axial or cross blast designs, with axial being more common, and require a compressed air system to supply high pressure air for arc extinguishing.
highvoltagecircuitbreakers-180415102549.pdf
Circuit breakers are used to protect electrical networks and equipment. They contain movable contacts that open to interrupt the current flow during faults. When the contacts separate, an arc is formed due to ionization. Various methods are used to quench the arc, including using oil, vacuum, air blast, or SF6 gas to rapidly increase the dielectric strength between contacts and extinguish the arc. Common types of circuit breakers include oil, vacuum, air blast, and SF6 gas circuit breakers, which vary based on the medium used to quench arcs and interrupt current.
Circuit breaker Solar Power Plant, Wind Power Plant
The document discusses circuit breakers, which are switching devices that can operate manually or automatically to control and protect electrical power systems. Circuit breakers must safely interrupt arcs produced when opening circuits carrying large currents. They allow for timely disconnecting and reconnecting of power systems for protection and control by safely opening under high current conditions and extinguishing arcs. The document then discusses the working principles of circuit breakers, including their mechanical and electrical operation, as well as types of circuit breakers classified by arc quenching media, application, operating mechanism, and voltage level.
AMAN SINGH PANWAR 21BARCH0008.pptx
This document provides definitions and information about various electrical concepts and components. It discusses electric charge, current, conductance, resistance, resistivity, conductivity, conductors, insulators, semiconductors, wires, alternating current, direct current, power transmission networks, single phase and three phase power supply systems, earthing methods, appliances like MCBs and fuses, and relevant Indian Electricity Acts.
Circuit Breaker
Thank you for the detailed explanation on different types of circuit breakers. I appreciate you taking the time to provide this information.
Devices part 2
This document discusses power semiconductor devices and related topics over multiple pages. It covers SCR firing circuits, commutation circuits, heat sinks, snubber circuits, fuse selection, and the series and parallel operation of SCRs. It also discusses switching losses that occur in semiconductor devices when they are turned on and off. Key points covered include how SCRs are fired, the purpose of commutation and snubber circuits, heat dissipation methods, fuse types and ratings, and factors that influence power losses in semiconductor switches.
Air - Blast Circuit Breakers: Types, Advantages, Disadvantages, Application
Air - Blast circuit breakers employ high pressure Air – Blast as an arc quenching medium. The contacts are opened in a high flow of air blast established by the opening blast valve.
Earthing electrode, Plate Earthing, Pipe earthing | Renown Earth
Renown earth manufactured Earthing electrode, Plate Earthing, Pipe earthing, earth pit cover, earthing busbar,earthing rod, copper bonded rod etc...
Similar to Circuit breaker(encrypted) (20)
Air Blast Circuit Breaker(ABCB)_Switchgear & protection.pptx
Air Blast Circuit Breaker(ABCB)_Switchgear & protection.pptx
Circuit breaker Solar Power Plant, Wind Power Plant
Circuit breaker Solar Power Plant, Wind Power Plant
Air - Blast Circuit Breakers: Types, Advantages, Disadvantages, Application
Air - Blast Circuit Breakers: Types, Advantages, Disadvantages, Application
Earthing electrode, Plate Earthing, Pipe earthing | Renown Earth
Earthing electrode, Plate Earthing, Pipe earthing | Renown Earth
More from Rohini Haridas
Rohini haridas wind energy
The document discusses wind energy and wind turbines. It begins by explaining that wind energy comes from differential heating of the Earth's surface by the sun, which causes air currents. It then discusses various factors that affect wind, such as atmospheric pressure differences. The rest of the document discusses the key components of wind turbines, including blades, generators, gearboxes, and control systems. It also compares horizontal axis and vertical axis turbine designs, and explains how factors like blade number can impact a turbine's efficiency and cost.
Magnetic circuit
This document discusses magnetic circuits and concepts related to magnetism. It defines a magnet and explains that magnets have north and south poles where iron filings accumulate. It then describes the two laws of magnetism - like poles repel and unlike poles attract, and the force between poles is directly proportional to the product of their strengths and inversely proportional to the square of the distance between them. The document goes on to define magnetic field, magnetic lines of force, magnetic flux, pole strength, magnetic flux density, and how an electric current can produce magnetism in electromagnets. It concludes by explaining conventions for representing current direction and magnetic field direction graphically.
Protection of transmission lines (distance)
This gives idea about necessity of protection of transmission line and protection based on time grading as well as on current grading. Also includes three step distance protection of transmission line
Ppt maintenance cb(encrypted)
This document discusses maintenance and installation of circuit breakers. It outlines two types of maintenance: corrective maintenance which is done after failure, and preventive maintenance which is done on a schedule to prevent failures. Preventive maintenance is recommended for switchgear. The document then details 13 steps for circuit breaker maintenance including inspection, cleaning, drying, checking contacts and mechanisms. It concludes with 13 steps for circuit breaker installation including foundation preparation, assembly, testing, and energization.
Miniature circuit breaker(encrypted)
A miniature circuit breaker (MCB) protects electrical circuits from overloads and short circuits. It has a frame, operating mechanism, and trip unit. When too much current flows through the MCB, the bimetallic strip heats up and bends, causing the moving contact to break the current carrying path and cut off power to the circuit.
Protection of transmission lines(encrypted)
This document discusses protection methods for transmission lines. It describes:
1. Transmission lines require more protective schemes than other equipment due to their long lengths and exposure, making faults more common.
2. Key methods of transmission line protection include time-graded overcurrent protection, differential protection, current-graded overcurrent protection, and distance protection.
3. Distance protection uses impedance relays that can discriminate between faults along the line and those near the end, providing more selective operation than overcurrent protection alone. It describes implementations using simple impedance, reactance, and mho relays.
Protection of alternator(encrypted)
The document discusses protection methods for alternators, including differential protection which is most commonly used to detect stator winding faults such as phase-to-phase faults, phase-to-ground faults, and inter-turn faults. Specifically, it mentions current differential relays and percentage differential relays to protect against unbalanced loading and faults in the stator windings of alternators.
Construction of dc machines
The document describes the main construction of DC machines. It lists the two major parts as the stator, which houses the field winding, and the rotor, which rotates in the magnetic field. It then describes the other key parts which include the yoke, poles, field winding, armature winding, commutator, and brushes. The yoke forms a protective covering and carries magnetic flux. The poles contain core and shoe components that produce magnetic flux. The field and armature windings use copper wire to generate electromagnetism. The commutator collects alternating current from the armature and converts it to direct current, while the brushes collect this current.
Stepper motor(encrypted)
We know that electric motor is a machine that converts electrical energy into mechanical energy. But there difference between conventional motor and stepper motor.
1. Input to stepper motor is in the form of electric pulses whereas input to conventional motor is from constant voltage source
2. A CM has a free running shaft whereas shaft of SM moves through angular steps.
So this presentation will help to understand the basic operating principal of stepper motor, its types and some applications
Testing of dc machines_I
This document discusses different methods for testing DC machines. It describes the objectives of testing as determining if a machine's performance matches its design specifications and investigating any variations. Three main testing methods are outlined: direct, indirect, and regenerative. The direct method involves directly loading the machine and measuring efficiency. The indirect method determines performance characteristics from no-load test data using methods like Swinburne's test. Swinburne's test involves running the machine at no-load and recording parameters to calculate constant and stray losses. Examples of calculations for torque, output, and efficiency using data from brake tests are also provided.
More from Rohini Haridas (10)
Recently uploaded
Computational Engineering IITH Presentation
This Presentation will give you a brief idea about what Computational Engineering at IIT Hyderabad has to offer.
Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...
Medical image analysis has witnessed significant advancements with deep learning techniques. In the domain of brain tumor segmentation, the ability to
precisely delineate tumor boundaries from magnetic resonance imaging (MRI)
scans holds profound implications for diagnosis. This study presents an ensemble convolutional neural network (CNN) with transfer learning, integrating
the state-of-the-art Deeplabv3+ architecture with the ResNet18 backbone. The
model is rigorously trained and evaluated, exhibiting remarkable performance
metrics, including an impressive global accuracy of 99.286%, a high-class accuracy of 82.191%, a mean intersection over union (IoU) of 79.900%, a weighted
IoU of 98.620%, and a Boundary F1 (BF) score of 83.303%. Notably, a detailed comparative analysis with existing methods showcases the superiority of
our proposed model. These findings underscore the model’s competence in precise brain tumor localization, underscoring its potential to revolutionize medical
image analysis and enhance healthcare outcomes. This research paves the way
for future exploration and optimization of advanced CNN models in medical
imaging, emphasizing addressing false positives and resource efficiency.
artificial intelligence and data science contents.pptx
What is artificial intelligence? Artificial intelligence is the ability of a computer or computer-controlled robot to perform tasks that are commonly associated with the intellectual processes characteristic of humans, such as the ability to reason.
› ...
Artificial intelligence (AI) | Definitio
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressions
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
Unit-III-ELECTROCHEMICAL STORAGE DEVICES.ppt
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
Fuel Cells: Introduction- importance and classification of fuel cells - description, principle, components, applications of fuel cells: H2-O2 fuel cell, alkaline fuel cell, molten carbonate fuel cell and direct methanol fuel cells.
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
Advanced control scheme of doubly fed induction generator for wind turbine us...
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
2008 BUILDING CONSTRUCTION Illustrated - Ching Chapter 02 The Building.pdf
2008 BUILDING CONSTRUCTION Illustrated - Ching Chapter 02 The Building
Hematology Analyzer Machine - Complete Blood Count
The CBC machine is a common diagnostic tool used by doctors to measure a patient's red blood cell count, white blood cell count and platelet count. The machine uses a small sample of the patient's blood, which is then placed into special tubes and analyzed. The results of the analysis are then displayed on a screen for the doctor to review. The CBC machine is an important tool for diagnosing various conditions, such as anemia, infection and leukemia. It can also help to monitor a patient's response to treatment.
Comparative analysis between traditional aquaponics and reconstructed aquapon...
The aquaponic system of planting is a method that does not require soil usage. It is a method that only needs water, fish, lava rocks (a substitute for soil), and plants. Aquaponic systems are sustainable and environmentally friendly. Its use not only helps to plant in small spaces but also helps reduce artificial chemical use and minimizes excess water use, as aquaponics consumes 90% less water than soil-based gardening. The study applied a descriptive and experimental design to assess and compare conventional and reconstructed aquaponic methods for reproducing tomatoes. The researchers created an observation checklist to determine the significant factors of the study. The study aims to determine the significant difference between traditional aquaponics and reconstructed aquaponics systems propagating tomatoes in terms of height, weight, girth, and number of fruits. The reconstructed aquaponics system’s higher growth yield results in a much more nourished crop than the traditional aquaponics system. It is superior in its number of fruits, height, weight, and girth measurement. Moreover, the reconstructed aquaponics system is proven to eliminate all the hindrances present in the traditional aquaponics system, which are overcrowding of fish, algae growth, pest problems, contaminated water, and dead fish.
哪里办理(csu毕业证书)查尔斯特大学毕业证硕士学历原版一模一样
原版一模一样【微信：741003700 】【(csu毕业证书)查尔斯特大学毕业证硕士学历】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Recently uploaded (20)
4. Mosca vol I -Fisica-Tipler-5ta-Edicion-Vol-1.pdf
4. Mosca vol I -Fisica-Tipler-5ta-Edicion-Vol-1.pdf
Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...
Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...
Generative AI leverages algorithms to create various forms of content
Generative AI leverages algorithms to create various forms of content
artificial intelligence and data science contents.pptx
artificial intelligence and data science contents.pptx
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressions
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressions
Manufacturing Process of molasses based distillery ppt.pptx
Manufacturing Process of molasses based distillery ppt.pptx
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
Advanced control scheme of doubly fed induction generator for wind turbine us...
Advanced control scheme of doubly fed induction generator for wind turbine us...
2008 BUILDING CONSTRUCTION Illustrated - Ching Chapter 02 The Building.pdf
2008 BUILDING CONSTRUCTION Illustrated - Ching Chapter 02 The Building.pdf
john krisinger-the science and history of the alcoholic beverage.pptx
john krisinger-the science and history of the alcoholic beverage.pptx
Hematology Analyzer Machine - Complete Blood Count
Hematology Analyzer Machine - Complete Blood Count
Comparative analysis between traditional aquaponics and reconstructed aquapon...
Comparative analysis between traditional aquaponics and reconstructed aquapon...
Circuit breaker(encrypted)
- 1. Presentation on Basics of Circuit Breaker & Its Types By, Rohini Haridas Assistant Professor, Dept of Electrical Engineering, SSGM College of Engineering,Shegaon
- 2. Circuit Breaker • Electrical circuit breaker is a switching device which can be operated manually as well as automatically for controlling and protection of electrical power system respectively. • The circuit breaker mainly consists of fixed contacts and moving contacts. In normal "on" condition of circuit breaker, these two contacts are physically connected to each other.
- 3. Circuit Breaker Control Circuit(trip Circuit)
- 4. What is Arc ? • During opening of current carrying contacts in a circuit breaker the medium in between opening contacts become highly ionized through which the interrupting current gets low resistive path and continues to flow through this path even the contactscontinues to flow through this path even the contacts are physically separated. • During the flowing of electric current from one contact to other the path becomes so heated that it glows. This is called arc.
- 5. Formation of Arc • Thermal ionization (due to increase in temperature) • Ionization due to Electron Collision• Ionization due to Electron Collision Whenever free electrons come across a strong electric field, these are directed towards higher potential points in the field and acquire sufficiently high velocity.
- 6. Methods of Arc Interruption • High resistance method we can increase the electrical resistance many times to such a high value that it forces the current to reach to zeroto zero • Low resistance method The arc gets extinguished at the natural zero of the ac wave and is prevented from restricting again by rapid building of dielectric strength of the contact space.
- 7. Principle used in Air Break Circuit Breaker
- 8. Air Break Circuit Breaker
- 9. Air Blast Circuit Breaker • Air blast circuit breakers employ a high pressure air as an arc quenching medium. • The opening of contacts are done by a flow of air blast established by the opening of blast valve (located between air reservoir and arcing chamber ). • The air blast sweeps away the arching products in to the atmosphere. • Thus the dielectric strength of the medium is increased, prevents from re-establishing the arc. • The arc get extinguished and flow of current is interrupted.
- 10. Types of Air Blast Circuit Breaker The circuit breakers are classified on the basis the direction of air blast to the arc. They are classified into : • Axial Blast Type • Cross Blast Type
- 11. Axial Blast Type air blast is directed along the arc path.
- 12. Working of Axial Blast CB
- 13. Cross Blast Type air blast is directed at right angles to the arc path.
- 14. Air Blast Circuit Breaker
- 15. Double arc extinction chamber