DIN 43807:1983 測量和控制.電測量儀表.配電板儀表、測量功率及功率因數(shù)的配電板儀表和測量轉(zhuǎn)換器用端子標(biāo)記.
Measuring and control; electrical measuring instruments; terminal markings for switchboard meters, panel meters and measuring transducers for the measurement of power and power factor