EMBEDDED SYSTEM

EMBEDDED SYSTEM

INTRODUCTION:

For the first three-quarters of this century, conventional Electromechanical or Ferrari meters have dominated the monitoring of electrical power and energy. These meters operate reliably and perform their task satisfactorily. The utilities continue to use and purchase them. However, the growing demands and stringent specifications have fostered the development of electronic or

Over 40 countries have implemented prepaid meters in their markets. In United Kingdom the system, has been in use for well over 70 years with about 3.5 million consumers. The prepaid program in South Africa was started in 1992, since then they have installed over 6 million meters. Other African counties such as Sudan, Madagascar are following the South African success. The concept has found ground in Argentina and New Zealand with few thousands of installations.

The prepaid meters in the market today are coming up with smart cards to hold information on units consumed or equivalent money value. When the card is inserted, the energy meter reads it, connects the supply to the consumer loads, and debits the value. The meters are equipped with light emitting diodes (LED) to inform consumers when 75 percent of the credit energy has been consumed. The consumer then recharges the prepaid card from a sales terminal or distribution point, and during this process any changes in the tariff can also be loaded in the smart card.


for more info visit.
http://www.enjineer.com/forum