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The single phase prepaid kWh meter consists of energy metering and STS system, based on International Standard: IEC 62055-31, 62055-41, IEC 62055-51. The energy metering measure line voltage, current and calculates active, reactive apparent power, energy, power factor, and RMS voltage and current. There are two separate inputs to measure line, ground, and/or neutral current enabling the meter to detect tampering and to continue operating. Development of single phase based on needs of PLN, which is about 7 million units kWh meter up to year 2014, especially for new customer.The energy metering subsystem is developed based on CS5464 Cirrus Logic IC that has been widely used around the world. The features of CS5464 as follows: Energy Linearity ±0.

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