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Product Name: Single-Phase Electromechanical Type Prepayment MeterModel Number: DDY200DPlace of Origin: ChinaBrief introduction:DDY200 serial single-phase electromechanical type prepayment energy meter is the new-model prepayment watt-hour meter firstly designed and developed by Tianjin Seasun Electronic Industrial Co., Ltd. On the basis of solid experience getting from operating the IC card ammeter, the electric energy meter has improved substantially in attack-proof and safety. The electric energy meter adopts the international popular intelligent CPU card to perform a two-way transmission of the electric quantity purchased and consumed and the data of electricity consumption between watt-hour meters and the electricity purchasing management system, thus the functions of electricity measurement and prepayment are realized. The electric energy meter possesses excellent safety, compatibility and extensibility. As for the external attacks, such as socket short circuit, bayonet high voltage static electricity and bayonet direct/alternating current attack, the electric energy meter finds new ways to protect, so it owns the attack-proof ability. The electric energy meter is made of high-quality components and parts, and adopts the advanced production technologytechnology and SMT stick technology, so it enjoys high reliability.Main technological index (all the functional indexes of the watt-hour meter are in accord with the requirements of JB/T8362-1996 Prepayment Watt-hour Meter):1) Accuracy: 2.0 class2) Specifications of current: 5 (10)A, 5 (20)A, 10 (40)A, 20 (80)A3) Rated voltage: 220V4) Limited voltage: 176V-253V5) Rated frequency: 50Hz6) Enduring voltage: 2kV7) Voltage circuit function: ≤1W, 4VA8) Mounting dimensions: 133.88mm, 168.2mm, 114.0mmMain characteristics:1) Adopting the intelligent CPU card, which make the product possess excellent safety,compatibility and extensibility2) The main secret password is controlled by the power supply department, and theproduction support card and the consumer card are separated, thus theconfidentiality is high3) Adopting the mutual attestation of SAM model and CPU card, which enables theMCU program independent of the secret password management4) Function of the emergent card without name solves the difficult problem ofconsumers not being able to immediately purchase the electricity again at theelectricity selling departments5) Faults displaying function6) Excellent bayonet attack-proof design to prevent from many kinds of externalattacks and disturbances7) Adopting the external trip switch control project to efficiently guarantee the chargeand using life of the switch8) Setting the functions of giving an alarm at a certain electric quantity and restrictedelectricity purchase9) The electricity purchasing system adopts special wire to construct the Real-time net,so that the users can purchase electricity in another place10) As the irrevocable fault occurs, the control system can cut the power off
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