A circuit breaker is defined as, switching device which interrupts the faulty current and performs the function of a switch thus protecting the electrical system from damage.
There are two essential contacts in a circuit breaker, and they are:
When the circuit is closed, which is a normal condition, the contacts touch each other and carry the current under this condition. Under a closed circuit breaker, current-carrying contacts are known as electrodes that engage each other due to the pressure of a spring.
The switching and maintenance of the system are taken care of by either opening or closing the arms of the circuit breaker. The circuit breaker is opened by applying pressure to the trigger. When there is a faulty current flowing through any part of the system, the trip coil of the breaker gets energized thereby moving away from each other, thus opening the circuit.
Also read:
Electrical Fuse |
Following are the four types of circuit breakers:
The air circuit breaker is also known as an air blast circuit breaker as they are air-based circuit breakers. In this circuit breaker type, the arc extinguishing medium used is a high-pressure air blast. In case of a faulty current flow, the blast valve opens the contact. The restriking of the arc is prevented by sweeping the ionized particles into the atmosphere, which increases the strength of the dielectric in the medium.
There are three types of air circuit breakers:
SF6 is a sulfur hexafluoride circuit breaker in which sulfur hexafluoride is used as the arc extinguishing medium. The sulfur hexafluoride gas attracts free electrons. As the circuit contacts are opened, the gas flows through the chamber striking the arc. The free electrons are then absorbed by the SF6 resulting in immobile negative ions. For the arc to extinguish completely, the Insulating strength of the medium should be increased. Both the contacts, fixed and moving contacts are placed in the arc chamber along with the gas.
In vacuum circuit breakers, the vacuum is the arc extinguishing medium. The insulating strength of this circuit breaker type is excellent compared to other types. There is a formation of an arc when the vacuum is opened as there is the ionization of the metal vapours. The moving and fixed contact along with the arc shield is mounted in the vacuum chamber.
In oil circuit breakers, oil is used as the arc extinguishing medium. The arc strikes when the contacts are opened in the oil thus, evaporating the surrounding oil as hydrogen gas. The arc region is surrounded by the hydrogen gas bubble. The hydrogen gas has a high thermal conductivity which cools the arc and deionizes the medium. There is turbulence caused in the surrounding oil pushing away the arcing products.
There are two types of oil circuit breakers:
Read more:
Circuit Components |
Difference Between MCB and MCCB |
Electric Circuit and Electrical Symbols |
Stay tuned with BYJU’S to learn more about other concepts of Physics.
A switch is used as one of the electrical components that is used for opening and closing of the circuit in normal operation. While a circuit breaker is used to either open or close the circuit during faulty currents.
The function of a circuit breaker is to make and break the circuit under faulty conditions of current.
There are two important parts of circuit breakers:
Following are the typical signs of a bad breaker:
There are two purposes of circuit breakers:
PHYSICS Related Links | |
Astigmatism Eye Defects | Fundamental Unit Of Life |
Anemometer - Measurement Of Wind Speed | Unit Of Radioactivity |
Unit Of Capacitance | Stefans Boltzmann Constant Value |
Si Unit Of Electric Flux | Dirac Equation |
Si Unit Of Momentum | Moment Of Inertia Units |
玻璃钢生产厂家漯河肖像玻璃钢彩绘雕塑定做玻璃钢鹿雕塑厂商定制洛阳玻璃钢花盆花器宁陵玻璃钢雕塑茂名小品玻璃钢雕塑奉化玻璃钢雕塑三门峡公园景观玻璃钢彩绘雕塑城市景观雕塑玻璃钢大连玻璃钢雕塑定做怎么制作玻璃钢雕塑玻璃钢花盆生产公司番禺玻璃钢雕塑彩绘招聘信息江苏中庭商场美陈厂家直销玻璃钢泡沫雕塑选哪家商场夏季dp美陈莱阳玻璃钢南瓜屋雕塑安庆学校玻璃钢雕塑优势南宁玻璃钢雕塑哪家便宜防城港玻璃钢花盆深圳特色商场美陈供应商邯郸肖像玻璃钢雕塑江苏商场美陈销售厂家南京商场入口美陈商场美陈巡场表下载宿迁商场美陈费用太原人物玻璃钢雕塑供应商烟台玻璃钢广场雕塑定制玻璃钢道教雕塑制作上海秋季商场美陈批发价沈阳创意玻璃钢雕塑价位香港通过《维护国家安全条例》两大学生合买彩票中奖一人不认账让美丽中国“从细节出发”19岁小伙救下5人后溺亡 多方发声单亲妈妈陷入热恋 14岁儿子报警汪小菲曝离婚始末遭遇山火的松茸之乡雅江山火三名扑火人员牺牲系谣言何赛飞追着代拍打萧美琴窜访捷克 外交部回应卫健委通报少年有偿捐血浆16次猝死手机成瘾是影响睡眠质量重要因素高校汽车撞人致3死16伤 司机系学生315晚会后胖东来又人满为患了小米汽车超级工厂正式揭幕中国拥有亿元资产的家庭达13.3万户周杰伦一审败诉网易男孩8年未见母亲被告知被遗忘许家印被限制高消费饲养员用铁锨驱打大熊猫被辞退男子被猫抓伤后确诊“猫抓病”特朗普无法缴纳4.54亿美元罚金倪萍分享减重40斤方法联合利华开始重组张家界的山上“长”满了韩国人?张立群任西安交通大学校长杨倩无缘巴黎奥运“重生之我在北大当嫡校长”黑马情侣提车了专访95后高颜值猪保姆考生莫言也上北大硕士复试名单了网友洛杉矶偶遇贾玲专家建议不必谈骨泥色变沉迷短剧的人就像掉进了杀猪盘奥巴马现身唐宁街 黑色着装引猜测七年后宇文玥被薅头发捞上岸事业单位女子向同事水杯投不明物质凯特王妃现身!外出购物视频曝光河南驻马店通报西平中学跳楼事件王树国卸任西安交大校长 师生送别恒大被罚41.75亿到底怎么缴男子被流浪猫绊倒 投喂者赔24万房客欠租失踪 房东直发愁西双版纳热带植物园回应蜉蝣大爆发钱人豪晒法院裁定实锤抄袭外国人感慨凌晨的中国很安全胖东来员工每周单休无小长假白宫:哈马斯三号人物被杀测试车高速逃费 小米:已补缴老人退休金被冒领16年 金额超20万
Comments