廈門水超器(qi)械主(zhu)營：助(zhu)(zhu)聽(ting)(ting)器(qi)，老人助(zhu)(zhu)聽(ting)(ting)器(qi)，兒(er)童(tong)(tong)助(zhu)(zhu)聽(ting)(ting)器(qi)，平(ping)頂山耳背式助(zhu)(zhu)聽(ting)(ting)器(qi)，各種品(pin)(pin)牌助(zhu)(zhu)聽(ting)(ting)器(qi)等相關(guan)產品(pin)(pin)。防聾(long)(long)治聾(long)(long)，服務(wu)重(zhong)視耳科保(bao)健，減少(shao)聾(long)(long)癥發生防聾(long)(long)重(zhong)在(zai)科普，治聾(long)(long)重(zhong)在(zai)科學關(guan)注(zhu)聽(ting)(ting)障兒(er)童(tong)(tong)康復實施聽(ting)(ting)力(li)殘疾人康復，共建共享小康社(she)會。

即電(dian)(dian)(dian)能運用(yong)，而(er)所有電(dian)(dian)(dian)路(lu)里的電(dian)(dian)(dian)能工作運用(yong)即稱為電(dian)(dian)(dian)路(lu)功(gong)(gong)率。電(dian)(dian)(dian)路(lu)或電(dian)(dian)(dian)路(lu)元(yuan)件(jian)的功(gong)(gong)率定(ding)義為：【功(gong)(gong)率=電(dian)(dian)(dian)壓*電(dian)(dian)(dian)流（P=I*V）】。自然(ran)界里能量(liang)不會消滅(mie)，固有一定(ding)律(lv)【能量(liang)守恒(heng)定(ding)律(lv)】。電(dian)(dian)(dian)路(lu)總功(gong)(gong)率=電(dian)(dian)(dian)路(lu)功(gong)(gong)率+各電(dian)(dian)(dian)路(lu)元(yuan)件(jian)功(gong)(gong)率。例如：【電(dian)(dian)(dian)源（I*V）=電(dian)(dian)(dian)路(lu)（I*V）+ 各元(yuan)件(jian)（I*V）】

廈門水超(chao)器(qi)械主(zhu)營(ying)：助(zhu)聽(ting)(ting)器(qi)，老人助(zhu)聽(ting)(ting)器(qi)，兒童助(zhu)聽(ting)(ting)器(qi)，耳(er)(er)背式助(zhu)聽(ting)(ting)器(qi)驗配中心(xin)，各種品牌(pai)助(zhu)聽(ting)(ting)器(qi)等相關產品。防聾(long)治聾(long)，服務重視(shi)耳(er)(er)科(ke)保健，減少聾(long)癥發生(sheng)防聾(long)重在科(ke)普，治聾(long)重在科(ke)學關注聽(ting)(ting)障兒童康復實施聽(ting)(ting)力殘(can)疾人康復，耳(er)(er)背式助(zhu)聽(ting)(ting)器(qi)門店(dian)，共建共享小康社會(hui)。

這時(shi)，為了分(fen)析和計算電(dian)(dian)(dian)路(lu)的(de)需要，引入了電(dian)(dian)(dian)流(liu)參考(kao)方向(xiang)(xiang)(xiang)的(de)概(gai)念，參考(kao)方向(xiang)(xiang)(xiang)又叫假定(ding)(ding)正方向(xiang)(xiang)(xiang)，簡稱正方向(xiang)(xiang)(xiang)。所謂正方向(xiang)(xiang)(xiang)，就(jiu)(jiu)是在一(yi)段電(dian)(dian)(dian)路(lu)里，耳背式助(zhu)聽器(qi)專賣(mai)店(dian)，在電(dian)(dian)(dian)流(liu)兩種可能的(de)真(zhen)實(shi)方向(xiang)(xiang)(xiang)中，任意(yi)選擇一(yi)個作為參考(kao)方向(xiang)(xiang)(xiang)（即(ji)假定(ding)(ding)正方向(xiang)(xiang)(xiang)）。當(dang)實(shi)際的(de)電(dian)(dian)(dian)流(liu)方向(xiang)(xiang)(xiang)與假定(ding)(ding)的(de)正方向(xiang)(xiang)(xiang)相(xiang)同(tong)時(shi)，電(dian)(dian)(dian)流(liu)是正值(zhi)；當(dang)實(shi)際的(de)電(dian)(dian)(dian)流(liu)方向(xiang)(xiang)(xiang)與假定(ding)(ding)正方向(xiang)(xiang)(xiang)相(xiang)反時(shi)，電(dian)(dian)(dian)流(liu)就(jiu)(jiu)是負值(zhi)。

廈門水超器(qi)(qi)(qi)械主營：助聽(ting)(ting)器(qi)(qi)(qi)，老人助聽(ting)(ting)器(qi)(qi)(qi)，兒童(tong)助聽(ting)(ting)器(qi)(qi)(qi)，各種品牌助聽(ting)(ting)器(qi)(qi)(qi)等(deng)相關(guan)產品。防(fang)聾(long)治聾(long)，服務重視耳(er)科(ke)保健，減少聾(long)癥發生(sheng)防(fang)聾(long)重在科(ke)普，治聾(long)重在科(ke)學(xue)關(guan)注聽(ting)(ting)障(zhang)兒童(tong)康復實施聽(ting)(ting)力殘疾人康復，共(gong)建共(gong)享小康社會。

按照《GB3805-83》安全電(dian)(dian)(dian)壓(ya)規(gui)定(ding)了為防止觸電(dian)(dian)(dian)事故而采用(yong)的(de)(de)，由特定(ding)電(dian)(dian)(dian)源供電(dian)(dian)(dian)的(de)(de)的(de)(de)電(dian)(dian)(dian)壓(ya)系(xi)列。我(wo)國對工頻(pin)安全電(dian)(dian)(dian)壓(ya)規(gui)定(ding)了以下(xia)五(wu)個等級，即42V、36V、24V、12V和6V。名詞定(ding)義：雙繞組變壓(ya)器中一個繞組短路(lu)，以額(e)定(ding)頻(pin)率的(de)(de)電(dian)(dian)(dian)壓(ya)施加于(yu)另一個繞組上