1. A PRESENTATION ON ENERGY METERING BY AMADI OBI CHARLES PHY/10/2394

2. What is an Energy meter
A Energy meter is an electronic device that is shows how much energy is being supplied to a circuit in watts. it also measures and calculates conveniently the rate at which power is being consumed.

3. Types of energy meters
Energy meters are categorically of two types namely;
Electronic meter
Electrochemical meter
Type of electronic meter
The pre-paid meter
The post-paid meter
Pre-paid meters are smart meter that has being programmed to supply only the quantity of power in kwh that has being loaded on it, this is done by vending on the meter by means of a token or a smart card.

4. Aims of metering To monitor the user’s its power consumption rate.
To conserve and efficiently manage resources.
To reduce estimated billing.
Loss reduction
Reduce wastage

5. Types of pre-paid meters
The smart card meters
The key change/token meters
The token meters are built and modified to suit various purpose. So we have:
Single phase (split) meters
Single phase (compact) meters
Three phase (split) meters
Three phase (compact) meters

6. Installation materials
Meter box
Miniature circuit breaker (MCB)
Hammer
Pliers
Insulation tape
Multimeter
Concrete nails
Cable wire
Set of screw drivers
Flexible wire
Flexible conduit
UIU
Cable gland
MCB( single phase)
Flexible wire(two core)
MCB (three phase)
Meter seal
Meter box

7. Installation steps Locate the power house of the facilities.
Identify the source and consumer load wire.
Fasten the meter box on the wall/board between the source and load wire using an hammer or a power screw.
Unscrew the meter terminal cover, then mount the meter on the meter box with the aid of a screwdriver.
Mount the Miniature circuit breaker (MCB) on the rail provided for it on the meter box with the help of screw drivers.
Link the electronic meter to the Miniature circuit breaker (MCB) using the copper cable.

8. Installation steps
Connect the user interface unit (UIU) with the electronic meter using two core flexible wire in the case of split meters.
Connect the consumer load wire to the output end of MCB.
Connect the source wire to the meter.
Fasten meter box cover, and seal the meter with a designated seal after every installation.
Reconnect power source to the meter, the meter is initiated immediately.
Input the token through the UIU, if the installation was properly done. The UIU will display success and the amount of power on the meter in kwh.
Power supplies to the facilities.

9. The images above shows a prepaid meter at the point of installation

10. Conclusion
Prepaid meters with their advantages over the conventional ones are likely to help power distributors to differentiate and offer value-added services to consumers. Encouraging consumers to opt for prepaid meters on a voluntary basis and offering tariff or non-tariff incentives to those consumers who prepay their power charges, would help the utilities to implement this system.