A scheme of Electricity billing system called “PREPAID ENERGY METER WITH TARIFF INDICATOR” can facilitate in improved cash flow management in energy utilities and can reduces problem associated with billing consumer living in isolated area and reduces deployment of manpower for taking meter readings. Every consumer can buy a memory card (is nothing but an EEPROM IC) with a password stored inside it using a MC program. The memory card is available at various ranges (ie. Rs 50, Rs 100, Rs 200 etc…).

In our project we have given the name for memory card as smart card. When the consumer insert a smart card into the card reader which is connected in “prepaid energy meter with tariff indicator” kit. Then the card reader will read the stored information and delete the information from the EEPROM IC (smart card) using the MC program. So that the smart card cannot be reused by others. Suppose if a consumer buys a card for Rs.50/- he / she can insert this amount through the card reader so that prepaid energy meter with tariff indicator kit will be activated. According to the power consumption the amount will be reduced. When the amount is over, the relay wills automatically shutdown the whole system. In our project we also have a provision to give an alarm sound to consumer before the whole amount is reduced.

The scope of the project work is to introduce advanced technology in converting dc voltage in to ac voltage and introducing prepaid energy metering concept.

The energy meter used in this project work produces pulses according to the load and this meter is converted as prepaid energy meter using smart card, hence this meter can be called smart energy meter.

This kind of smart energy meters also can be installed at each and every house, where the state electricity department going to supply the conventional energy. Now a day’s energy Measurement and electric energy pilferage detection has become prime importance for the state electricity department.

With the help of this project work lot of Manpower can be reduced and power pilferage can be controlled. The overall system can be called as AMR (Automatic Meter reading) system, the main advantage of AMR system is that the consumed energy price can be calculated and at the same time price (amount in rupees) can be displayed automatically.

Finally the simplest form of smart metering is a display meter, which allows consumers to monitor consumption in money terms rather than kWh.