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1、Circuit breaker断路器Compressed air circuit breaker is a mechanical switch equipment, can b e i空气压缩断路器是一种机械开关设备，能够在n normal and special conditions breaking current (such as short circuit cur 正常和特殊情况下开断电流(比如说短路电流)。rent). For example, air circuit breaker, oil circuit breaker, interference circ例如空气断路器、油断路
2、器，干扰电路的导体uit conductor for the application of the safety and reliability of the circuit 干扰电路的导体因该安全可靠的应用于其中，breaker， current in arc from is usually divided into the following grades :a电流断路器按灭弧远离通常被分为如下等级 :ir switch circuit breaker, oil circuit breaker, less oil circuit breaker, co mpr空气开关断路器、油断路器、少油
3、断路器、压缩空essed air circuit breaker， a degaussing of isolating switch, six sulfur hex af气断路器、具有消磁性质的隔离开关、六氟luoride circuit breaker and vacuum breaker。Their parameters of voltage, 化硫断路器和真空断路器.他们的参数有电压等级、 current, insulation level of breaking capacity, instantaneous voltage of f ti开断容量的电流、绝缘等级开断时间的瞬时电压恢复
4、和me of recovery and a bombingo Breaker plate usually include: 1 the maxi 轰炸时间。断路器的铭牌通常包括：1.最大可承mum tolerable current; 2 of the maximum current is interrupted ； 3 large st受电流；2.最大中断电流；3。最大线line voltage ； 4 interrupt the cycle number. In the 60hHZ system, interr upt路电压；4.中断周期数量.在60hHZ的系统中，中断may last f
5、rom 3一 to 8 cycle, in order to quickly break up to the load curre可能持续3-至8个周期，为了快速中断达负荷电流，nt, we have to ensure continued to cool it ,high 一speed, breaking can limit我们不得不确保它的持续冷却，高速 开断能限制on transmission line damage, it is equally important to help system to mai 对传输线路的损害，这一点是同等重要的它帮助系统ntain stable ope
6、ration at any time of the accident, the main circuit breaker 在任何事故发生时维持稳定运行，断路器主要by operating mechanism, actuator and arc quenching chamber.由操作机构、执行机构和灭弧室组成。When a trigger current or voltage, spring operation mechanism of air isol当有触发电流或者电压时，空气隔离开关的弹簧操作机构ation switch moves quickly to reduce the cont
7、act loss, special shape and u迅速动作以用来减少触点的烧损，主触点的特殊形se the material of main contact completely fit for the arc of contact， air is状和使用材料完全适合电弧的接触，空气olation switch further improvement is due to the arc quenching performan隔离开关更进一步的改进是由于灭弧性能ce, insulating baffle plates arc shield, with arc the function o
8、f these specia绝缘隔板组成的灭弧罩，带灭弧功能的触头等这些特殊性l properties, it is used in low voltage and DC circuit breaker。质，所以仍被应用于低电压等级和直流断路器中。Oil circuit breaker in around 1900， mainly to meet the new， breakingcapa多油断路器出现于1900前后，主要用来满足新的开断容量的要求，city requirements, AC switch is immersed in an oil cylinder, the oil in t
9、he交流开关被浸入一个油缸之中，油在arc quenching and zero set off function is very effective in the current， arc熄灭电弧和在电流过零时建立开断功能是十分有效,gate, nozzle, pear, a new operation mechanism and a variety of the new c灭弧栅、喷油嘴、鸭梨锄头、新的操作机构和多种新的断路功能 ircuit function in recent decades to introduce the use of oil circuit breaker 在近几
10、十年引进使用多油断路器能够适应362kV。can adapt to 362kV.Types and Construction of Transformer变压器的类型和结构A transformer is a device that alternating current electric energy at one vo 变压器是一个通过磁场作用将一个交流电压值变成另一个电压值的 ltage level into alternating current electric energy at another voltage level 设备。through the action of a ma
11、gnetic field。It consists of two or more coils wir它由2条或更多的金属丝缠绕在e wrapped around a common ferromagnetic core。These coils are （usually）一个核心磁铁上组成的。这些绕线（一般）不直not directly connected。 The only connection between the coils is the com 接接触。绕线之间唯一的联系是它们共有的存在于磁芯 mon magnectic flux presen within the core.的磁通量。O
12、ne of the transformer windings is connected to a source of ac electric po 一组变压器绕组连接到一个交流电源上，wer,and the second(and perhaps third) transformer winding supplies elect同时第二组(或许第三组)变压器绕组作为电源提供给负载.ric power to loads。 the transformer winding connected to the power sou ce连接到电源上的变压器绕组叫做一次绕组，或者输is called the
13、primary winding or input windingo and the winding connecte 入绕组。连接负载的绕组叫做二次d to the loads is called the secondary winding or input winding.If there is 绕组或者输出绕组。如果电压a third winding on the transformer,it is called the tertiary winding. Powe器上有第三绕组，它叫做三次绕组.电力变r transformer are constructed on one of two types of cores.one type of con 压器由一两种磁芯中的一种构成。一种构造是由struction consists of a simple rectangular laminated piece of steel with the 一种简单的变压器绕组缠绕在矩形两边的矩形薄钢片组成。transformer windings wrapped around two sides of the rectangle This typ这种构e of construction is know as coreform .The other type co
