开关装置

A switch includes a case having an upper surface having a hole provided therein, an operating unit inserted into the hole movably up and down, plural switch contacts activated upon the operating unit moving up and down, and a guide wall protruding downward from an inner edge of the hole.

一种开关装置，包括：具有形成有开口孔的上表面的外壳；可上下移动地插入开口孔内的操作体；随操作体的上下移动而进行动作的多个开关接点；从开口孔向下方伸出的导向壁。外壳的开口孔具有内周端。

The aim of these researches is to improve the work performance and reliability of switching devices and finish the protection and control of the power supply system. This work is based on the design of VCB with multiple breaks and vacuum arc of high current in short-gap is studied.

本文探讨真空开关电弧外部形态特征和内部等离子体参数的诊断，旨在提出相应的调控理论以提高开关装置的工作性能和指标，完成电力系统的保护和控制任务。

Through be being compared with electromagnetism type transformer and phase of traditional switch plant, the characteristic that introduced switch of electronic type transformer, intelligence and use method.

通过和电磁式互感器和传统开关装置相比较，介绍了电子式互感器、智能开关的特征和使用方法。

Company's existing electrical products and machinery processing production capacity: Mine QBZ series of mine flameproof vacuum electromagnetic starter, QJZ series of mine Flameproof and nature of security vacuum electromagnetic starter, QJZ series of mine flameproof and intrinsically safe Vacuum-mobile electromagnetic starter, QJZ series of mine flameproof and intrinsically safe exchange of soft / straight starter, PBG1 series of high-pressure mine explosion-proof vacuum distribution equipment, KBZ series of mine flameproof vacuum Feed Switch, the coal mine explosion-proof electric drill, lighting signal integrated protection device, KJP-belt machine comprehensive protection and GCS, GGD Series高低压开关cabinet, various types of distribution boxes, large and medium-sized motors, such as launch counter.

公司现有电器产品及机械加工制作能力：矿用QBZ系列矿用隔爆型真空电磁起动器、QJZ系列矿用隔爆兼本质安全型真空电磁起动器、 QJZ系列矿用隔爆兼本质安全型手提真空电磁起动器、QJZ系列矿用隔爆兼本质安全型交流软/直起动器、PBG1系列矿用隔爆型高压真空配电装置、 KBZ系列矿用隔爆型真空馈电开关、矿用隔爆型煤电钻、照明信号综合保护装置、 KJP型皮带机综合保护器及GCS、GGD系列高低压开关柜、各类配电箱、大中型电机、启动柜等。

Group main products are: three-phase modular overvoltage protectors, high voltage current-limiting fuse combination of protective devices, de-excitation of synchronous generator rotor device, large-capacity high-speed switching device, extinction arc and over-voltage protection device, computer system protection device, intelligent switchgear, etc., series, nearly a hundred kinds of products.

集团主要产品有：三相组合式过电压保护器、高压限流熔断器组合保护装置、同步发电机转子灭磁装置、大容量高速开关装置、消弧及过电压保护装置、微机系统保护装置、智能开关装置等七大系列，近百种产品。

Our main products are: microprocessor-based arc, harmonic elimination and PT counters, high-capacity three-phase modular overvoltage protectors, Intelligent Switchgear control devices (SC-8), current mutual inductance Secondary over-voltage protectors, large-capacity high-speed switching device, de-excitation of synchronous generator rotor Switchgear, composite over-voltage protectors, low-voltage modular overvoltage protectors ( SCB-400), high voltage current-limiting fuse combination switch cabinet, computer integrated protection device and other products.

公司主要产品有：微机型消弧、消谐及PT柜、高能容三相组合式过电压保护器、开关柜智能操控装置（SC-8）、电流互感器二次过电压保护器、大容量高速开关装置、同步发电机转子灭磁开关柜、复合式过电压保护器、低压组合式过电压保护器（SCB-400）、高压限流熔断器组合开关柜、微机综合保护装置等产品。

Switch gear mainly includes circuit breaker, disconnecting switch , load-break switch and fuse.

开关装置主要包括断路器、隔离开关、负荷开关和熔断器。

Switchgear mainly includes circuit breaker, disconnecting switch, load -break switch and fuse.

开关装置主要包括断路器、隔离开关、负荷开关和熔断器。

Switchgear mainly includes circuit break er, disconnecting switch, load- break switch and fuse.

开关装置主要包括断路器、隔离开关、负荷开关和熔断器。

Reelcraft has several types of switches and speed controls available. These switches are motor size specific and must be wired properly for the hose reel to function correctly.

锐技卷轴公司有许多各种类型的开关和速度控制装置，这些开关装置都是和电机配套的，并且需要正确的安装才能发挥出它的功效。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。