DD28系列單相電能表DD28 series single phase watt-hours meter用途Application: DD28型單相電度表系感應單相交流有功電度表，適用于頻率為50Hz，單相交流電網(wǎng)中有功電能的計量。具有體積小、結構設計緊湊、低功耗等特點，其技術指標完全符合GB/T15283-1994國家標準及IEC521國際標準。 DD28 single-phase watt-hour meter is a kind of induction meter.which is applicable to measure the rated frequency 50Hz and power loss in electrified wire netting.All technical targets are completely conformed to National standard GB/T15283-1994 and lntermational standard IEC521.結構特點Structure feature: 該儀表采用分離式鐵芯結構，軸承具有單寶石、雙寶石、磁推式、磁懸式四種結構，外殼采用鋁、塑料和玻璃三種，基架由優(yōu)質鋁合金壓鑄而成，具有良好的機械強度。The meter has separable electromagnet and the bearing has four kinds;single-jewel,magnetic thrust and magnetic floating.The case has three kinds;aluminum,plastic and glass.The die-casting frame is alloy aluminum with excellent mechanical strength.主要技術參數(shù)main technical data:型號Type:DD282 DD283 DD284精度（級）Accurocy(class):2額定電壓Rated voltage(v):220-240額定電流Rated current(A):DD282:2(4),2.5(5),3(6),5(10),10(20),20(40),30(60),40(80) DD283:2(6),3(9),5(15),10(30),15(45),20(60),30(90)DD284:5(20),3(12),10(40),15(60),20(80)過載能力Overl0ad capaciaty:200％Ib 300％Ib 400％Ib絕緣性能Insulation current:工頻交流電壓2kV 歷時1分鐘，沖擊電壓強6kVAC voltage 2kV for 1 minute impulse voltage 6kV外型：DD28透明塑殼；DD28黑色塑殼；DD28玻璃殼；DD28鋁殼