Cov ntsuas hluav taws xob hluav taws xob feem ntau yog cais raws li lawv cov theem teeb tsa thiab kev ua haujlwm. Raws li theem kev teeb tsa, cov pawg tseem ceeb yog ib qho -theem hluav taws xob hluav taws xob ntsuas hluav taws xob thiab peb-theem hluav taws xob ntsuas hluav taws xob. Raws li kev ua haujlwm, lawv suav nrog cov qauv ntsuas ntsuas, hom them ua ntej (piv txwv li, qauv DDSY8118 thiab DDSY422), thiab ntau- hom kev ua haujlwm (uas tuaj yeem ntsuas ob qho tib si rau pem hauv ntej / rov qab ua haujlwm thiab rov ua haujlwm, thiab muaj peev xwm ua tau zoo xws li kev kaw cov xwm txheej thiab kev sib txuas lus).
Feem ntau ib zaug -theem qauv ntsuas hluav taws xob ntsuas hluav taws xob suav nrog cov qauv xws li DDS870, DDS480, DDS237-1, thiab DDS110 [9-10] [15]. Kev ua tau zoo ntawm tus qauv DDS870 ua raws li tus qauv GB/T17215-2002; tus qauv DDS480 kuj ua raws li tus qauv GB/T17215-2002; thiab tus qauv DDS237-1 ua raws li tus qauv GB/T17215.321-2008. Lawv qhov tseem ceeb tsis muaj xws li cov kev ntsuas tam sim no (piv txwv li, 1.5 (6) A, 5 (60) A), kev siv hluav taws xob ntawm 220V, cov chav kawm raug (Class 1.0, Class 2), thiab zaus ntawm 50Hz / 60Hz.
Tib -theem prepaid hluav taws xob ntsuas hluav taws xob feem ntau suav nrog cov qauv xws li DDSY422 thiab DDSY8118. Tus qauv DDSY422 yog tsim los rau lub sij hawm- ntawm- siv (TOU) metering ntawm AC active zog nyob rau hauv ib qho -phase fais fab daim phiaj, nrog rau tej thaj chaw deb tariff tswj; nws ua raws li cov qauv xws li DL/T645-2007, nta ib tug tam sim no specification ntawm 5(60)A, thiab belongs rau qhov raug chav kawm 1.0.
Qee cov qauv txhawb nqa cov yam ntxwv ntxiv xws li kev tiv thaiv- muaj peev xwm tampering, muaj peev xwm ntau dhau (piv txwv li, tshaj 10 npaug ntawm qhov ntsuas tam sim no), thiab kev siv LCD lossis cov ntawv sau npe tshuab.