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Mitsubishi group
Mitsubishi group (Mitsubishi Group) is a loose joint consists of the originalJapanese Mitsubishi plutocrat disintegrate after the company entity, the nameMitsubishi Mitsu says "three", while Bishi said "water caltrop". Mitsubishi grouphas 100 years of history, especially after the Meiji Restoration, Mitsubishigroup began into the true sense of the development. Then Mitsubishi began to get involved in mining, shipbuilding, banking, insurance, warehousing and trading, then business paper, steel, glass, electrical equipment, aircraft, oiland real estate industry. Development so far, Mitsubishi has set up a series ofenterprises play a decisive role, playing a role in the process of industrial modernization in japan.
Group
Mitsubishi logo originated in two parts: "MITs" means "three", "Bishi"represents "water chestnut", is a combination of Iwasaki was the family clanemblem "three Ling" and soil with Lord Yamauchi family clan emblem "San BaiLing".
Unlike other family firms, once for the development of Japan "first zaibatsu"Mitsubishi group is not the Iwasaki family start empty-handed build, but Iwasaki Ataro took over from the hands of the government.
The story should speak of from the experience of Iwasaki Ataro. In 1834, MItaro was born in an "underground" ronin "family. This lower social status,stimulate the MI taro to improve the social status and continue to make efforts.
Japan less people, with arable farmland is at all levels of government to dream of things. Perhaps, the merchant is the ability of natural. A day with brotherfishing, facing the broad river Mi taro sudden inspiration: if on the Bank of the river embankment, river reclamation, hand to resist the flood, hand can increase the farmland. With this in mind, Iwasaki brothers immediately apply to the fan County Gazette group plan, and approved quickly. In 1864, riverreclamation be accomplished, that year won the grain, cotton harvest. Since then, hundreds of acres of land by the river brought income to MI taro, evenas he landed "political capital" because of Farmland: active, Ata Ro was appointed to the Kochi city pursues the subordinate officials. After the Meiji Restoration, was from Nagasaki to Tosa domain into Hall of the chamber of Commerce, appointed as Acting Secretary General into the hall.
After the Meiji Restoration, Japan Society respected business. The new government think, fan business will squeeze the folk enterprise survival space,Fan Ying decided to abolish the cause. 1871 in such a historical opportunity,,Ata Ro completely took over the government run "big selling chamber of Commerce", with "ninety-nine chamber" as his firm, the chamber of Commercein the boat bought, began operating Osaka - Tokyo, Kobe, Kochi maritimetransport industry. These symbols of the ship, is today MITSUBISHI logo. In 1873, Ata Ro will be renamed "MITSUBISHI chamber of Commerce Chamber of commerce". Since then, he's completely off the robe, the spirit of "good faithspirit of opposition of the heart", engage in shipping industry.
Established at the beginning of the MITSUBISHI chamber of Commerce and small scale, less Mitsui chamber of Commerce, but by virtue of goodreputation, Ata Ro laid a certain foundation for your career. On 1873, PiusMitsui chamber of Commerce political forces lost, MITSUBISHI chamber of commerce until the chance. In 1874, the Japanese invasion of the island of Taiwan, Ata Ro took the opportunity to ask for instructions to cabinet ministerstake all the munitions transport work. In order to guarantee the transportation,the government of Japan for 7710000 yen to buy 13 steamboat lendMITSUBISHI chamber of Commerce, at the same time, its rival 18 merchant ships have the unconditional lend MITSUBISHI chamber of commerce. In addition, every year also give MITSUBISHI 250000 yuan subsidy.
In 1877 Japan China's southwestern war, Secretary of State Condoleezza Okubo Rintong decided in 15 years, installment loan repayment way, lend Mitaro 3450000 yen capital, the purchase of 10 ships, let MITSUBISHI companyassist military transportation. After the war, these ships were the governmentall gave Mitsubishi Co. In the southwest of the war in 8 months time, the Japanese government used in shipping costs as high as 13000000 yen,equivalent to 1/3 of the total cost of the war, most of which are Mitsubishi Coincome capsule. At that time, MITSUBISHI owned steamboat at 61 ships,35464 tonnes, accounting for the Japanese national steamboat tonnage of 73%, Mitsubishi Co became the mistress of the seas.
However, in order to curb the excessive expansion of MITSUBISHI group, the Meiji Government prohibited the development of shipping business other than MITSUBISHI. Expanded ambitions but this does not prevent the MI taro, he is the center of steamboat, will cause to expand the scope of foreign exchangeindustry, marine insurance industry, warehousing industry etc.. Fornegotiation in the Mitsubishi Co of goods are transported by ship toMITSUBISHI, and by MITSUBISHI in insurance, in MITSUBISHI warehouse,thereby, MITSUBISHI exchange, insurance, transportation, warehousing and other aspects of the profits doubled.
Mark of origin
The MITSUBISHI logo is a symbol of the Iwasaki family family "three Ling" andsoil with Lord Yamauchi family family symbol combination of "San Bai Ling",then gradually evolved into today's MITSUBISHI logo (pictured at left), in the Meiji 43 years (in 1910) in its current form for MITSUBISHI joint venturecompany the English version of business guide book. MITSUBISHI(MITSUBISHI) of the three diamond shaped logo was originally ninety-ninechamber of Commerce flag records, it is a shipping company in nineteenth Century 70, many Mitsubishi Co are developed by the company. Now, this logo is a symbol of the company MITSUBISHI organization staff proud. And, tocustomers all over the world, this logo is the quality and product maintenance,
1、 空气断路器的额定电压必须大于或等于线路的工作电压。【负载或额定电源的电压要大于或等于开关的额定电压，因为这事关产品的安全性能。高于开关额定电压的电压有可能会使产品绝缘性能性能下降，存在事故隐。】
2、 空气断路器的额定短路通断能力≥线路中可能出现的最大短路电流。【线路中发生相线与相线或相线与中性线之间的短路电流是很大的，越是接近电源分配端的电流就越大，因为整个短路回路的阻抗小。因此要求空气断路器必须有一定的短路分断能力，当短路分断能力大于或等于线路中可能出现的最大短路电流时，在瞬时脱扣器的作用下，开关能瞬时熄弧断开。如开关的额定短路通断能力≤线路中可能出现的最大短路电流因开关不能熄弧，由燃弧引起的过高温度使触点粘（短路）从而毁坏配电线路以致设备。】
3、 空气断路器的额定电流≥线路的负载电流。【负载的额定电流必须等于或小于开关的额定电流，一般情况下小于开关的额定电流，考虑到留有一定的裕度，一般选开关的额定电流比实际负载电流大20℅左右，不要选得太大，必须考虑过载保护及短路保护都能动作，选取过大的额定电流，过载保护失去作用，由于线路的粗细及长短关系，负载端的短路电流达不到瞬时脱扣器的整定动作值，从而使短路保护失效。】
4、 漏电空气断路器的额定漏电动作电流必须≥2倍的线路业已存在的泄漏电流。【在配电线路中由于线路的绝缘电阻随着时间的增长会下降及对地布线分布电容的存在，线路或多或少对地存在一定的泄漏电流，有的还比较大，因此在选取漏电空气断路器的额定漏电动作电流必须大于实际泄漏电流的两倍才能保证开关不会误动作，这也是与国家标准规定的额定漏电不动作电流为额定动作电流的一半是相符合的。】
5、 空气断路器末端单相对地短路时能使选用B、C、D型瞬时脱扣器的开关动作，对于不同类型的负载（用电设备）选用不同的瞬时脱扣器和相应的电流等级的产品。根据不同的负载设备选用不同类型的瞬时脱扣器和额定电流，B、C、D型瞬时脱扣器的使用对象前面有说明。选取额定电流及相应的瞬时脱扣器时必须考虑负载的额定电流及可能输出的最大短路电流。当最大短路电流大于或等于B、C、D型瞬时脱扣器的整定动值时，短路保护才能起作用。
6、 在装漏电保护器之前必须搞清原有的供电保护型式，以便判断是否可以直接安装或需改动。【供电保护型式在前面已有详细说明。在未安装漏电空气断路器之前，有些设备已采取一些供电保护型式，但是有一些保护型式如不改动是不适宜直接安装漏电空气断路器，否则会引起开关的误动或拒动。具体使用将在后面案例中进行分析。
7、 有进出线规定的产品必须严格按要求接线，进出线不可反接。【漏电空气断路器必须按要求接线，否则会引起开关漏电保护功能的损坏，因漏电保护线路板的工作电源从开关的出线端引出，如采取反接线，则线路板的工作电源长期存在，一旦漏电保护动作，内部电磁脱扣线圈因长期通电而损坏（电磁脱扣线圈的设计为瞬时工作方式），漏电功能损坏。
塑壳断路器：
经济型
NF30-CS , NF63-CW, NF100-CWB(NF125-CW),
NF250-CWB, NF400-CW, NF630-CW, NF800-CEW
标准型
NF32-SW, NF63-SW, NF125-SW, NF-125-SGW RT, NF-125-SGW RE,
NF160-SW,NF160-SGW RT, NF250-SW, NF250-SGW RT, NF250-SGW RE,
NF400-SW,NF400-SEW, NF630-SW, NF630-SEW, NF800-SEW, NF1000-SEW,
NF1250-SEW,NF1600-SEW
高性能型
NF63-HW, NF125-HW, NF125-HGW RT, NF125-HGW RE, NF160-HW,
NF160-HGW RT,NF160-HGW RE, NF250-HW, NF250-HGW RT,
NF250-HGWRENF400-HEW,NF630-HEW,NF800-HEW
带漏电报警塑壳断路器：
经济型
NF63-ZCW,NF125-ZCW,NF250-ZCW,NF400-ZCW,NF630-ZCW
标准型
NF63-ZSW,NF125-ZSW,NF250-ZSW,NF400-ZSW,NF400-ZEW,
NF630-ZSW,NF630-ZEW,NF800-ZEW
高性能型NF63-ZHW,NF125-ZHW,NF250-ZHW
漏电断路器：
经济型
NV63-CW,NF125-CW,NV400-CW,NV630-CW
标准型NV32-SW,NV63-SW,NV125-SW,NV250-SW,NV400-SW,NV400-SEW,NV630-SW,
NV630-SEW,NV800-SEW
高性能型NV63-HW,NV125-HW,NV250-HW,NV400-HEW,NV630-HEW,NV800-HEW
限流型断路器：
塑壳断路器NF30-FAU,NF50-FAU,NF50-FHU,NF100-F
