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該繼(ji)電(dian)器適用(yong)于各種鑲嵌屏及信(xin)號保護屏上(shang)，當被(bei)保護系(xi)統發生故障，主保護繼(ji) 電(dian)器動(dong)作時(shi)，通(tong)過(guo)閃光(guang)繼(ji)電(dian)器控制各種燈光(guang)信(xin)號。 LXB-1A電(dian)流繼(ji)電(dian)器,LXB-2A電(dian)流繼(ji)電(dian)器

電(dian)流橫差(cha)繼電(dian)器用于發電(dian)機橫聯差(cha)動保護回路中，作為反(fan)應定(ding)子繞組并聯分支中電(dian)流差(cha)的(de)(de)元件。當出現高(gao)次諧(xie)波(bo)時，保護的(de)(de)靈敏度降低。 DLH-2型電(dian)流橫差(cha)繼電(dian)器

DL–21B型(xing)(xing)電(dian)(dian)流橫差(cha)(cha)繼電(dian)(dian)器(qi)（以下簡(jian)稱(cheng)繼電(dian)(dian)器(qi)）用于(yu)發電(dian)(dian)機橫聯差(cha)(cha)動保護(hu)回路中，作為反(fan)應定子(zi)繞(rao)組并(bing)聯分支中電(dian)(dian)流差(cha)(cha)的(de)元件。當出現高次諧波時，保護(hu)的(de)靈敏度降低(di)。 DL-21B型(xing)(xing)電(dian)(dian)流橫差(cha)(cha)繼電(dian)(dian)器(qi)

低定值電(dian)(dian)(dian)流(liu)(liu)繼電(dian)(dian)(dian)器在繼電(dian)(dian)(dian)需(xu)要大的靈敏(min)度，即(ji)繼電(dian)(dian)(dian)器的長(chang)期允許電(dian)(dian)(dian)流(liu)(liu)為動作電(dian)(dian)(dian)流(liu)(liu)高位(wei)數的情(qing)況(kuang)下作為二(er)次繼電(dian)(dian)(dian)器用于(yu)保(bao)護(hu)回路中。  DL-6電(dian)(dian)(dian)流(liu)(liu)繼電(dian)(dian)(dian)器,DL-7電(dian)(dian)(dian)流(liu)(liu)繼電(dian)(dian)(dian)器

DL-4,DL-5低(di)定值電(dian)(dian)流(liu)(liu)(liu)(liu)繼電(dian)(dian)器在繼電(dian)(dian)需要(yao)大(da)的靈(ling)敏度，即繼電(dian)(dian)器的長期(qi)允許電(dian)(dian)流(liu)(liu)(liu)(liu)為(wei)動作電(dian)(dian)流(liu)(liu)(liu)(liu)高位數(shu)的情況(kuang)下作為(wei)二(er)次(ci)繼電(dian)(dian)器用于保護回路中。 DL-4低(di)定值電(dian)(dian)流(liu)(liu)(liu)(liu)繼電(dian)(dian)器,DL-5低(di)定值電(dian)(dian)流(liu)(liu)(liu)(liu)繼電(dian)(dian)器