The DD104 long-life single-phase electricity meter is a carefully designed and manufactured long-life energy metering instrument based on the introduction of technology and proprietary manufacturing processes for magnetic thrust bearings. Its maintenance free mean time to failure (MTTF) can reach 25 years, and the overload factor of the electricity meter can reach 6 times; All parts have undergone special processing to meet the three prevention requirements. The movable part is supported by magnetic thrust bearings, achieving frictionless operation; The guiding structure is composed of imported graphite liners and stainless steel needles, which do not require oil injection and have low friction torque; Light load, full load, and phase angle adjustment are all achieved with stepless variable speed adjustment, and have self-locking function; The measuring device adopts a thin-walled bending frame and a thin shaft, without the need for lubricating oil, with a friction torque as small as 1mg.cm; The voltage coil is made of flame-retardant resin casting, which has good sealing and can withstand moisture for a long time. Its insulation is permanently unchanged, and its resistance to impact voltage can reach 6KV or more. The voltage coil is wrapped with high-strength enameled wire and placed in a plastic wire frame envelope for double insulation protection; And pulse terminals are equipped on the terminal box. The disc shaft is made of hard aluminum wire material, and the worm is directly turned on the shaft with a small outer diameter, reducing the friction torque of the caliper. Compensated for temperature errors at cos φ values of 1 and 0.5; The power consumption of the electric meter itself is below 0.8W. This table fully complies with the provisions of standards such as JB/T5467-97 and GB/T15283-94.

DD104 type long-life single-phase electricity meter