DDS353H-1/2/3 is a single phase DIN Rail meter, 100A, which is a multi-functional meter for energy monitoring. It is only 18mm width, but can support RS485 communication and comply with DIN EN 50022 standard, which is fit for the power distribution system for household and commercial. It can read grid parameters, analyze the energy quality and load condition in the certain time period. DIN RAIL (Comply to German Industry Standard ) mounted. Only 18 mm wdith, but can achieve 100A. The meter has Li-battery for RTC. The RTC accuracy is 0.5s every day. Blue backlight, which is for easy reading in dark place. Do scrolling display for current(A) , voltage(V) , etc. Measure the active and reactive energy accurately.