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What is Circuit Breaker? Electrical circuit breaker is a switching device which can be operated manually and automatically for controlling and protection of electrical power system respectively. As the modern power system deals with huge currents, the special attention should be given during deg of circuit breaker for safe interruption of arc produced during the operation of circuit breaker. This was the basic definition of circuit breaker. Introduction to Circuit Breaker The modern power system deals with huge power network and huge numbers of associated electrical equipments. During short circuit fault or any other types of electrical fault these equipment as well as the power network suffer a high stress of fault current in them which may damage the equipment and networks permanently.
Boost Converters From TI For saving these equipment and the power networks the fault current should be cleared from the system as quickly as possible. Again after the fault is cleared, the system must come to its normal working condition as soon as possible for supplying reliable quality power to the receiving ends. In addition to that for proper controlling of power system, different switching operations are required to be performed. So for timely disconnecting and reconnecting different parts of power system network for protection and control, there must be some special type of switching devices which can be operated safely under huge current carrying condition. During interruption of huge current, there would be large arcing in between switching s, so care should be taken to quench these arcs in circuit breaker in safe manner. The circuit breaker is the special device which does all the required switching operations during current carrying condition. This was the basic introduction to circuit breaker. Working Principle of Circuit Breaker The circuit breaker mainly consists of fixed s and moving s. In normal "ON" condition of circuit breaker, these two s are physically connected to each other due to applied mechanical pressure on the moving s. There is an arrangement stored potential energy in the operating mechanism of circuit breaker which is released if switching signal is given to the breaker. The potential energy can be stored in the circuit breaker by different ways like by deforming metal spring, by compressed air, or by hydraulic pressure. But whatever the source of potential energy, it must be released during operation. Release of potential energy makes sliding of the moving at extremely fast manner. All circuit breaker have operating coils (tripping coils and close coil), when-
7/3/17, 7:51 PM
Electrical Circuit Breaker | Operation and Types of Circuit Breaker | El...
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≡ This operating coil plunger is typically attached to the operating mechanism of circuit breaker, as a result the mechanically stored potential energy in the breaker mechanism is released in forms of kinetic energy, which makes the moving to move as these moving s mechanically attached through a gear lever arrangement with the operating mechanism. After a cycle of operation of circuit breaker the total stored energy is released and hence the potential energy again stored in the operating mechanism of circuit breaker by means of spring charging motor or air compressor or by any other means. Till now we have discussed about mechanical working principle of circuit breaker. But there are electrical characteristics of a circuit breaker which also should be considered in this discussion of operation of circuit breaker. Let's have a discussion on electrical principle of circuit breaker. The circuit breaker has to carry large rated or fault power. Due to this large power there is always dangerously high arcing between moving s and fixed during operation of circuit breaker. Again as we discussed earlier the arc in circuit breaker can be quenching safely if the dielectric strength between the current carrying s of circuit breaker increases rapidly during every current zero crossing of the alternating current. The dielectric strength of the media in between s can be increased in numbers of ways, like by compressing the ionized arcing media since compressing accelerates the deionization process of the media, by cooling the arcing media since cooling increase the resistance of arcing path or by replacing the ionized arcing media by fresh gasses. Hence a numbers of arc quenching processes should be involved in operation of circuit breaker. Types of Circuit Breaker According different criteria there are different types of circuit breaker. According to their arc quenching media the circuit breaker can be divided asAccording to their arc quenching media the circuit breaker can be divided as1. Oil circuit breaker. 2. Air circuit breaker. 3. SF6 circuit breaker. 4. Vacuum circuit breaker. According to their services the circuit breaker can be divided as1. Outdoor circuit breaker 2. Indoor breaker. According to the operating mechanism of circuit breaker they can be divided as1. Spring operated circuit breaker. 2. Pneumatic circuit breaker. 3. Hydrolic circuit breaker. According to the voltage level of installation types of circuit breaker are referred as1. High voltage circuit breaker. 2. Medium voltage circuit breaker. 3. Low voltage circuit breaker. Next »
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7/3/17, 7:51 PM
Electrical Circuit Breaker | Operation and Types of Circuit Breaker | El...
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Closely Related Articles Circuit Breaker Maintenance High Voltage Testing | Low Frequency Constant DC High Frequency Surge or Impulse Test Sulfur Hexafluoride | SF6 Gas Properties Routine Tests of Circuit Breakers Remote Controlling of Circuit Breaker by Microcontroller Circuit Breaker Operation Rating of Circuit Breaker | Short Circuit Breaking Making Current Short Circuit Current of Circuit Breaker Air Circuit Breaker Air Blast Circuit Breaker Oil Circuit Breaker Bulk and Minimum Oil Circuit Breaker Types and Operation of SF6 Circuit Breaker Vacuum Circuit Breaker or VCB and Vacuum Interrupter Residual Current Circuit Breaker Dielectric Gases More Related Articles What is an Arc ? | Arc in Circuit Breaker Arc Interruption Theory Vacuum Arc or Arc in Vacuum Electrical Fuse HRC Fuse High Rupturing Capacity Miniature Circuit Breaker or MCB Working Principle of Earth Leakage Circuit Breaker ELCB | Voltage and Current ELCB | RCCB
7/3/17, 7:51 PM
Electrical Circuit Breaker | Operation and Types of Circuit Breaker | El...
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≡ Electrical Switchgear Protection Electrical Isolator or Electrical Isolation Switch Low Voltage Switchgear or LV Switchgear Medium Voltage Switchgear High Voltage Switchgear Equipment Earthing GIS or Gas Insulated Switchgear Metal Enclosed Switchgear Vacuum Switchgear ZnO Gapless Lightning Arrester or Surge Arrester BIL or Basic Insulation Level Definition Table and Calculation New Articles Collecting Oil Sample from Oil Immersed Electrical Equipment Causes of Insulating Oil Deterioration Acidity Test of Transformer Insulating Oil Magnetic Flux Ring Counter
© 2011-2017 electrical4u.The content is copyrighted to electrical4u and may not be reproduced on other websites.
7/3/17, 7:51 PM
1 of 4
https://www.electrical4u.com/electrical-circuit-breaker-operation-and-...
≡
Thick Film Technologies Electrical Circuit Breaker | Operation and Types of Circuit Breaker Next »
What is Circuit Breaker? Electrical circuit breaker is a switching device which can be operated manually and automatically for controlling and protection of electrical power system respectively. As the modern power system deals with huge currents, the special attention should be given during deg of circuit breaker for safe interruption of arc produced during the operation of circuit breaker. This was the basic definition of circuit breaker. Introduction to Circuit Breaker The modern power system deals with huge power network and huge numbers of associated electrical equipments. During short circuit fault or any other types of electrical fault these equipment as well as the power network suffer a high stress of fault current in them which may damage the equipment and networks permanently.
Boost Converters From TI For saving these equipment and the power networks the fault current should be cleared from the system as quickly as possible. Again after the fault is cleared, the system must come to its normal working condition as soon as possible for supplying reliable quality power to the receiving ends. In addition to that for proper controlling of power system, different switching operations are required to be performed. So for timely disconnecting and reconnecting different parts of power system network for protection and control, there must be some special type of switching devices which can be operated safely under huge current carrying condition. During interruption of huge current, there would be large arcing in between switching s, so care should be taken to quench these arcs in circuit breaker in safe manner. The circuit breaker is the special device which does all the required switching operations during current carrying condition. This was the basic introduction to circuit breaker. Working Principle of Circuit Breaker The circuit breaker mainly consists of fixed s and moving s. In normal "ON" condition of circuit breaker, these two s are physically connected to each other due to applied mechanical pressure on the moving s. There is an arrangement stored potential energy in the operating mechanism of circuit breaker which is released if switching signal is given to the breaker. The potential energy can be stored in the circuit breaker by different ways like by deforming metal spring, by compressed air, or by hydraulic pressure. But whatever the source of potential energy, it must be released during operation. Release of potential energy makes sliding of the moving at extremely fast manner. All circuit breaker have operating coils (tripping coils and close coil), when-
7/3/17, 7:51 PM
Electrical Circuit Breaker | Operation and Types of Circuit Breaker | El...
2 of 4
https://www.electrical4u.com/electrical-circuit-breaker-operation-and-...
≡ This operating coil plunger is typically attached to the operating mechanism of circuit breaker, as a result the mechanically stored potential energy in the breaker mechanism is released in forms of kinetic energy, which makes the moving to move as these moving s mechanically attached through a gear lever arrangement with the operating mechanism. After a cycle of operation of circuit breaker the total stored energy is released and hence the potential energy again stored in the operating mechanism of circuit breaker by means of spring charging motor or air compressor or by any other means. Till now we have discussed about mechanical working principle of circuit breaker. But there are electrical characteristics of a circuit breaker which also should be considered in this discussion of operation of circuit breaker. Let's have a discussion on electrical principle of circuit breaker. The circuit breaker has to carry large rated or fault power. Due to this large power there is always dangerously high arcing between moving s and fixed during operation of circuit breaker. Again as we discussed earlier the arc in circuit breaker can be quenching safely if the dielectric strength between the current carrying s of circuit breaker increases rapidly during every current zero crossing of the alternating current. The dielectric strength of the media in between s can be increased in numbers of ways, like by compressing the ionized arcing media since compressing accelerates the deionization process of the media, by cooling the arcing media since cooling increase the resistance of arcing path or by replacing the ionized arcing media by fresh gasses. Hence a numbers of arc quenching processes should be involved in operation of circuit breaker. Types of Circuit Breaker According different criteria there are different types of circuit breaker. According to their arc quenching media the circuit breaker can be divided asAccording to their arc quenching media the circuit breaker can be divided as1. Oil circuit breaker. 2. Air circuit breaker. 3. SF6 circuit breaker. 4. Vacuum circuit breaker. According to their services the circuit breaker can be divided as1. Outdoor circuit breaker 2. Indoor breaker. According to the operating mechanism of circuit breaker they can be divided as1. Spring operated circuit breaker. 2. Pneumatic circuit breaker. 3. Hydrolic circuit breaker. According to the voltage level of installation types of circuit breaker are referred as1. High voltage circuit breaker. 2. Medium voltage circuit breaker. 3. Low voltage circuit breaker. Next »
Comments/s
7/3/17, 7:51 PM
Electrical Circuit Breaker | Operation and Types of Circuit Breaker | El...
3 of 4
https://www.electrical4u.com/electrical-circuit-breaker-operation-and-...
≡
Closely Related Articles Circuit Breaker Maintenance High Voltage Testing | Low Frequency Constant DC High Frequency Surge or Impulse Test Sulfur Hexafluoride | SF6 Gas Properties Routine Tests of Circuit Breakers Remote Controlling of Circuit Breaker by Microcontroller Circuit Breaker Operation Rating of Circuit Breaker | Short Circuit Breaking Making Current Short Circuit Current of Circuit Breaker Air Circuit Breaker Air Blast Circuit Breaker Oil Circuit Breaker Bulk and Minimum Oil Circuit Breaker Types and Operation of SF6 Circuit Breaker Vacuum Circuit Breaker or VCB and Vacuum Interrupter Residual Current Circuit Breaker Dielectric Gases More Related Articles What is an Arc ? | Arc in Circuit Breaker Arc Interruption Theory Vacuum Arc or Arc in Vacuum Electrical Fuse HRC Fuse High Rupturing Capacity Miniature Circuit Breaker or MCB Working Principle of Earth Leakage Circuit Breaker ELCB | Voltage and Current ELCB | RCCB
7/3/17, 7:51 PM
Electrical Circuit Breaker | Operation and Types of Circuit Breaker | El...
4 of 4
https://www.electrical4u.com/electrical-circuit-breaker-operation-and-...
≡ Electrical Switchgear Protection Electrical Isolator or Electrical Isolation Switch Low Voltage Switchgear or LV Switchgear Medium Voltage Switchgear High Voltage Switchgear Equipment Earthing GIS or Gas Insulated Switchgear Metal Enclosed Switchgear Vacuum Switchgear ZnO Gapless Lightning Arrester or Surge Arrester BIL or Basic Insulation Level Definition Table and Calculation New Articles Collecting Oil Sample from Oil Immersed Electrical Equipment Causes of Insulating Oil Deterioration Acidity Test of Transformer Insulating Oil Magnetic Flux Ring Counter
© 2011-2017 electrical4u.The content is copyrighted to electrical4u and may not be reproduced on other websites.
7/3/17, 7:51 PM
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