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UM/SWHM/V3/0115
1.
INTRODUCTION
A Prepaid Energy Meter enables power utilities and the maintenance team to collect electricity bills
from the consumers prior to its consumption. The prepaid meter is not only limited to Automated
Meter Reading [AMR] but is also attributed with prepaid recharging ability and information exchange
with the utilities pertaining to customer’s consumption details.
The idea of prepaid metering will be very important for the new research fields of Micro-grid and Smart
Grid and is an inevitable step in making any grid smarter than it is now. Prepaid is a plan that deducts
usage charges and any fixed charges from account balance each day. Consumer is expected to take
responsibility.
This Unique product termed as Contactless prepaid energy meter developed by Elmeasure, is
probably the first of its kind in the Indian meter manufacturing history. T he design is completely
microcontroller based thus provides effective solution to the electrical service providers. The action
required by the service provider is just to install the meter and further activities involve only the
consumer, which then is a very simple procedure to be followed. It is sufficient for the service provider
to have only one man power or no man power to recharge the meter as per the consumer's
requirement. This is not only limited to power and energy, Elmeasure devices also can integrate gas
and water meter with the different inlets of the house and deduct the balance based on consumption.
The meters can be networked with RS485, GSM/GPRS. The unique data communication enables the
secured recharging of the meter. Elmeasure has developed ELNet PPS software which enables the
customer to recharge the meters 24x7 using the payment gateway without even visiting the service
provider.
The microcontroller acquires signals from the metering element(s), processes them and calculates
values of measured energy or gas and water. The results are stored in registers for particular tariffs.
The microcontroller also generates pulses for the LED and, enables two-way communication via the
RS485 and drives the LCD and the control outputs.
1.1.
IMPORTANT INSTRUCTIONS
This Unit is meant to be installed on electrical panels for measurement / analysis / control of
electricity. It should be installed only by qualified, competent personnel who have the
appropriate training and experience with high voltage and current devices.
DANGER
Failure to observe the following may result in serious injury or death
!
During normal operation of the Unit, hazardous voltages are present on its terminal strips.
Follow standard safety precautions while performing any installation or servicing work (i.e.
removing PT fuses, shorting CT secondary’s, etc.)
!
Voltage inputs including auxiliary supply must be protected by fuses in each circuit.
!
Under no circumstances should the current input to the Unit be disconnected while current is
flowing in the primary circuit of the Current Transformer on the line.
