机柜内正负母排直接与电源主母排连接，这种方式施工有一定难度；铜排用塑料胶带裹绕，不露铜。
机房供电采用直流UPS系统的前提是要有比交流UPS更高的效率及确定合适的直流电压！
采用直流UPS系统供电方案还需解决直流母线、直流插座等零部件开发问题。
高压直流有利于传输电能，但元件耐压要求高；低压直流方便使用，但输电耗材，导线结构复杂。直流电压究竟定在多少伏合适，这需要电源生产厂家、服务器生产厂家、配电柜及元件生产厂家等共同协商确定。从以上分析看，本人认为直流UPS输出电压定在110V左右较为合适，即机柜内负载设备由直流110V供电，此电压对于直流配电设备和元件也易于满足。
试想今后计算机设备可制成两种类型：机房用和民用。机房用的以直流方式供电；民用的还是以交流（220V）方式供电。数字线路板的直流电源也要尽量统一成一种直流电压等级。
LONG蓄电池LGL150-12N 系列说明及简介销售
广隆LONG蓄电池公司自1990年创立以来已20年，是国内取得保税工厂及股票上市之铅酸蓄电池製造厂。近五年以来每年电池出货数达30%的複成长;创造高达40亿元的营业收入。为求分散生产风险与扩大销售市场，採取国际分工的产销政策，早在1996年即于越南国之滨沥县设厂，为早于当地建立电池生产基地之投资之外资企业。后于1999年与2000年分别完成ISO9001与ISO14001认证，2002年通过OHSAS18001认证，并于同年于台湾挂牌上市。至2007年又完成佔地达20万平方公尺之越南德和厂兴建，2008年通过TL9000通信/通讯电子业品质系统验证，并于2009年底起至2010年持续进行德和厂生产基地第二第三期的扩建工程。
于产品的製造，广隆除了对各生产环节严格的把关外，从技术体系到管理方法与业务流程都有著革命性的创新与实践。我们的产品在製造及确保产品遵循依品质管理系统下，全系列密闭式电池产品皆通过UL安规标准。另针对欧洲区安控市场的高品质需求，我们亦通过了德国VdS的认证。产品品质深受国内外之跨国企业的厚爱与认可。我们相信，客户满意度不仅只来自于产品本身，即时的服务提供与客户的友好关系建立更能提升客户满意的附加价值。广隆不仅获颁客户满意度金质奖外，产品亦荣获经济部评选为『台湾精品奖』的肯定。
我们的创新发展来自丰硕经验与能量，广隆拥有产品线广度完整及弹性製造技术的竞争优势，迄今已开发出超过400种不同用途之电池，并持续开发电动车，太阳能及风力等再生能源用电池。对于产品创新发展无穷尽的追求与态度，广隆自1993年起陆续与工研院材料所合作深度放电用密闭式电池、电动机车用电池及高功率改质电池等之开发，并多方引入新技术，更投资了许多先进的设备来彰显我们对客户与时俱进；永续发展的信念与承诺。
立足台湾，深耕越南，放眼环宇。广隆，以能为全球消费者提供更洁淨能源，并担负社会与环境的责任与维护的决心，进而带动公司持续成长与永续经营，兢兢业业努力不懈。
Guanglong long battery Co., Ltd. has been established for 20years since 1990. It is a professional lead-acid batterymanufacturer that has obtained bonded factory and stock listing inChina. In the past five years, the number of battery shipments peryear has increased by 30%, and the business income has reached 4billion yuan. In order to diversify the production risk and expandthe sales market, we adopted the production and marketing policy ofinternational division of labor. As early as 1996, we set up afactory in Binli County, Vietnam, which is a foreign-fundedenterprise with investment earlier than the local establishment ofbattery production base. After 1999 and 2000 respectively completedISO9001 and ISO14001 certification, passed OHSAS18001 certificationin 2002, and listed in Taiwan in the same year. By 2007, it hadcompleted the construction of Dehe factory in Vietnam with an areaof 200000 square meters. In 2008, it had passed the TL9000communication / communication electronic industry quality systemverification. From the end of 2009 to 2010, it continued to carryout the expansion project of the second and third phase of theproduction base of Dehe factory.
In the manufacturing of products, Guanglong has revolutionaryinnovation and practice from technical system to management methodand business process, in addition to strict control over allproduction links. Our products are precisely manufactured andguaranteed to follow the quality management system. All series ofsealed battery products have passed UL safety standard. Inaddition, we have also passed the German VDS certification for thehigh-quality demand of the security control market in Europe.Product quality is deeply loved and recognized by well-knownmultinational enterprises at home and abroad. We believe thatcustomer satisfaction not only comes from the product itself, butalso the value added of customer satisfaction can be improved byestablishing a friendly relationship with customers through instantservice provision. Therefore, Guanglong won not only the Gold Awardfor customer satisfaction, but also the "Taiwan boutique Award" bythe Ministry of economy.
Our innovation and development come from abundant experience andenergy. Guanglong has a complete product line and competitiveadvantage in flexible manufacturing technology. So far, it hasdeveloped more than 400 kinds of batteries for different purposes,and continues to develop batteries for renewable energy such aselectric vehicles, solar energy and wind power. For the endlesspursuit and attitude of product innovation and development,Guanglong has cooperated with the Institute of materials of theInstitute of engineering and research since 1993 to develop thesealed battery for deep discharge, the battery for electric motorvehicles and the battery for high power upgrading, and introducednew technologies in many ways, and invested many advanced equipmentto show our faith and commitment to keep pace with the times andsustainable development.
Based in Taiwan, deeply ploughing in Vietnam, looking around theworld. Guanglong is committed to providing cleaner energy forglobal consumers, shouldering social and environmentalresponsibilities and maintenance, so as to drive the company'ssustainable growth and sustainable operation, and make unremittingefforts.
广隆LONG蓄电池基本特性：
1.贮藏容量高。
2.充放电无酸雾。可大电流充电（0.8C-1C
3.充电接受能力强。8秒内30C放电电流，
4.可大电流放电。电流不损伤。可多次尽放电，
5.可超深度放电。电池不会损害。可在50~60℃温度下使用。
6.适温性极强。完全免维护，
7.自放电小。全充电后，常温存放一年仍可正常使用。为铅酸电池的一倍。
8.使用寿命长。报废后全部资料可再生回收，
绿色环保无污染。电解质无污染。能在各种恶劣的环境下安全使用。
10.抗震性能好。使用时可任意方位放置。
Basic characteristics of Guanglong long battery:
1. High storage capacity.
2. There is no acid mist during charging and discharging. Highcurrent charging (0.8C-1C
3. Strong charging acceptance ability. 30C discharge current in8 seconds,
4. High current discharge. The current is not damaged. It candischarge several times,
5. It can discharge beyond the depth. The battery will not bedamaged. It can be used at 50 ~ 60 ℃.
6. The temperature adaptability is very strong. Completelymaintenance free,
7. Small self discharge. After fully charging, it can still beused normally after being stored at normal temperature for oneyear. Double the lead-acid battery.
8. Long service life. All data can be recycled afterscrapping,
9. Green and environmental protection without pollution. Noelectrolyte pollution. It can be used safely in all kinds of badenvironment.
10. Good seismic performance. It can be placed in anydirection.
这种方式的问题是直流低压输电线截面太大，不便施工且耗材；20KW×10＝200KW，200KW/48V＝4167A，按电密2.0A/mm2，则所需一根导线截面2084mm2/Ф52mm；一米长导线的体积是20.84×100＝2084CM3，其重量是2084×8.9＝18.55KG，按现时的铜价（65元/公斤）计，则一米长正负极导线的价格是18.55×65×2＝1205.75×2元。
3）集中直流电源（110V）方式
这种方式比48V方式输电线截面小了不少，但依然很大，不便施工且耗材；20KW×10＝200KW，200KW/110V＝1818A；按电密2.0A/mm2，则所需一根导线截面909mm2/Ф34mm；一米长导线的体积是9.09×100＝909CM3，其重量是909×8.9＝8.09KG，按现时的铜价（65元/公斤）计，则一米长正负极导线的价格是8.09×65×2＝525.86×2元。
4）分布直流电源方式
这种方式保留了交流高压传输的优势，每列机柜内再以低压（48V）或（110V）直流传输供电。这样，20×10＝200KW，直流电源输入端的有功和视在功率分别是200/0.93＝215.05KW、215.05/0.98＝219.44KVA。折成电流是219.44KVA/380/1.732＝333.42A；按电密2.0A/mm2，则所需导线截面为166.71mm2；如果选用ZRYJV4×185+1×95电缆，则569元/米。
可见，分布直流电源方式比集中直流电源方式节材、省钱；这样，对于中大型机房的直流UPS系统供电选此供电方式较好。
是每列机柜内的直流供电方式问题，由于相对于交流高压，它所用导线截面很大，电缆就不合适了，可用铜（主）母排方式输电，为了节省铜材，本人设想用如下梯形方式叠成主母线。
1）对于直流48V供电，见图10。
这种方式采用主母排梯形排列，可节省铜材；例如：铜排100×2，20KW/柜，20000/48≈417A，要用150mm2/Φ13.8mm线；母排总电流，4170A，截面2000mm2线。
2）对于直流110V供电，见图11。
这种方式主母排截面比上一种的小多了，例如：铜排30×3，20KW/柜，20000/110≈182A，要用91mm2/Φ11mm线；母排总电流1818A，截面909mm2线。
还有从主母排向各机柜内的直流供电方式问题；设想在机柜内后部设置正负两根母排；柜内设若干直流插座（内设保护和监测线路），直流插座从柜内的正负两根母排取电。这样从主母排到柜内正负母排引电有两种方式：软电缆和母排。见图12和图13。
用软线连接两母排，这种方式较方便施工；铜排用塑料胶带裹绕，不露铜。