elmeasure PE5120, PE5121 User Manual

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User Manual

PREPAID METER

THREE PHASE | SINGLE PHASE

www.elmeasure.com

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Table of Contents

1 INTRODUCTION 3

1.1. IMPORTANT INSTRUCTIONS 3

1.2. ABOUT THIS GUIDE 4

1.3. PREPAID METER UNIQUE FEATURES 4

1.3.1. BENEFITS OF PREPAID METER 4

1.3.2. APPLICATIONS OF PREPAID METER 5

2. INSTALLATION 5

2.1. SAFETY WARNINGS 5

2.2. WIRING THE PREPAID METER 7

Wire the Dual Input 9

Wire the Digital Inputs (Max.4) 9

Wire the Communication (RS485) 9

Wire the Remote Unit 9

2.3. INSTALLING THE METER 9

2.3.1 INSTALLING A METER IN A NEW LOCATION 10

2.3.2 REPLACING AN EXISTING METER 10

2.3.3 INSTALLING THE SIM CARD INTO THE

DEVICE (GSM/GPRS METERS) 11

2.3.4 INSTALLING THE REMOTE UNIT 11

3. PREPAID METER CONFIGURATION 12

3.1. PREPAID METER PRODUCT DESCRIPTION 12

Physical Description 12

Models & Display parameters of Prepaid meter 14

3.2. PREPAID METER OPTIONS 14

4. PREPAID METER OPERATION 15

4.1. KEY FUNCTIONS 15

4.2. Wi-Fi RESET OPTION 16

4.3. PROGRAMMING GUIDE FOR 3PHASE

(PE5120)/1PHASE (PE5121) PREPAID METER 16

4.4. PREPAID OPTIONS 19

RF based 19

GSM/GPRS based 20

WI-FI based 20

RS485 with Aggregator 21

4.5. PREPAID FUNCTIONS 22

5. FEATURES OF PREPAID METER 23

5.1. COMMON FEATURES 23

5.2. OPTIONAL FEATURES 24

6. TECHNICAL SPECIFICATIONS 24

7. COMMUNICATION 26

7.1. COMMUNICATION OPTIONS 26

7.1.1. RS485 26

7.1.2. SMARTCARD 26

7.1.3. GSM/GPRS 27

7.1.4. WI-FI 28

7.1.5. REMOTE UNIT 28

7.2. COMMUNICATION REGISTER MAP FOR PREPAID

METER 29

8. TROUBLESHOOTING 30

9. DISCLAIMER 31

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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 th

e electrical

service providers.

he action

required

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 n o man p ower 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.

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CAUTION

For reliable operations establish input connections for voltage, Current and Aux. supply through spade lugs crimped to wire ends

! The front panel of the Unit lists the voltage and current limits that may be applied to various

terminals. Application of inputs beyond these limits may result in permanent damage to the Unit and will render the warranty void.

1.2. ABOUT THIS GUIDE

This document describes the Features of prepaid meter, Installation, Operation, Technical Specifications and Communication options. It is intended for use by metering administrators, installers, and meter technicians.

1.3. PREPAID METER UNIQUE FEATURES

• User friendly Prepaid Energy Metering Solutions

• Money based recharging. No separate recharging for EB and DG

• Integration of Gas and Water with the electrical parameters thereby, extending the flexibility

for the user to budget expenses

• Threshold point of kVA separately for EB and DG programmable to the individual customers with the ON/OFF profiling to save the equipment in the house

• Direct current measurement 10/ 60A (default) for Single or three phase measurements

• Charging the meter with credit revenue through secured communication

• Elmeasure encryption is added on top of this to provide the better security

• Emergency credit for the selected customer

• Remote ON / OFF load by the service provider

• Pulse data collection from up to four external devices, such as gas or water meters, with

tamper monitoring included (optional feature)

• LED pulse outputs for accuracy verification of kWh

• Meter can be manufactured with kWh and kVAh

• Signal relay for control of external contactor or other devices, with activation linked to the

currently active tariff period or controlled by remote command (optional feature)

• Visual blinking on display indication to customer for low balance, over voltage, over KVA etc

• Remote Display Unit allowing customer to recharge and monitor consumption

• Elmeasure prepaid meter has great optional feature i.e. individual phases on for DG (R, Y, B or

RYB or No DG). This feature can avoid ACCL to individual houses.

• Optional Battery-backed Real Time Clock (RTC) to maintain time accuracy and tamper detection during power outages.

1.3.1. BENEFITS OF PREPAID METER

• Improved operational efficiencies: The prepaid meters are likely to cut the cost of meter

reading as no meter readers are required. In addition, they eliminate administrative hassles associated with disconnection and reconnection

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• Reduced financial risks: Since the payment is up-front, it reduces the financial risk by

improving the cash flows and necessitates an improved revenue management system

• Better customer service: The system eliminates billing delay, removes cost involved in

disconnection/reconnection, enables controlled use of energy, and helps customers to save money through better energy management

•

The whole process of billing can be centralized

•

Cost of manpower for billing / collection is reduced or Nil

•

This avoids the hassles of human intervention as there is no need to enter the data into the meter. This makes the system more users friendly

•

Displays balance Energy in the meter, thus enabling the consumer to plan when to recharge

•

The smart recharge software (ELNet PPS) running in the service room

has

the option of

deducting

the common

lighting

charges/maintenance

charges either fixed for a month or

based on the amount of

area occupied

1.3.2. APPLICATIONS OF PREPAID METER

• Large scale development by utilities for Residential and Commercial connections

• Sub-metering in Apartments, Shopping malls and Building complexes

• Convenient mode of payment in housing colonies

• As a second meter between utility meter and distribution board for housing tenants

• Selective deployment by utilities in regions with poor credit history

• Electricity supply for vendors, contractors and temporary connections

2. INSTALLATION

2.1. SAFETY WARNINGS

Before you install and operate your meters, it is important to be familiar with all regulatory agency, manufacturer, and utility industry safety precautions. Observe these safety precautions during all steps of meter installation, operation, and service. Failure to comply with these precautions, or with specific warnings or instructions elsewhere in this guide, violates safety standards of design, manufacture, and the intended use of the meter. Elmeasure assumes no liability for failure to comply with these requirements. The information presented in this guide is intended to be an aid to qualified metering personnel. It does not replace the extensive training necessary to handle metering equipment in a safe manner.

Safety Warning: Any work on or near energized meters or other metering

equipment presents the danger of electrical shock. Only qualified electricians and metering specialists should be authorized to work with the meters, in accordance with local utility safety practices, utility requirements, and other safety precautions as dictated by local code, regulations, or statutes.

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INCOMING INSPECTION

Before the meter is installed, visual inspection, for any damage in the process of transportation, has to be carried out.

Safety Warning: Return damaged meters and components to Elmeasure do not

attempt to repair the damage. The meter has no user-serviceable parts. Any attempt to remove or repair internal parts voids the meter warranty.

REPACKING

If the meter has to be returned to the supplier, repack the unit in the packing in which it was supplied.

OPTIMUM FIELD CONDITIONS

For the reliability and better life of the product the unit has to be operated at moderate temperatures and humidity. The meter is designed to work from -5 to 60 degree C and humidity of 95% RH non condensing.

STORAGE

In case if the meter is not installed after receiving, it has to be stored in a dry place in the original packing material.

MOUNTING

Figure shows the location of the meter mounting holes. The Mount the Prepaid Energy Meter in a dry location free from corrosive vapours. To mount the Unit: In the real panel side we have wall mountable clamp, by using that mount the prepaid meter on the wall.

Fig. 1: Drawing for Single phase mounting details

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Fig. 2: Drawing for Three phase Mounting details

Mounting:

The front bezel of the basic model is molded plastic. Bezel dimensions are 160 x 112 mm (Depth 58mm behind bezel) for single phase prepaid meter and 173 × 262 mm (Depth 82mm behind the bezel) for three phase prepaid meter.

EXTRA PRECAUTIONS

Make sure of supply voltage, supply current and configuration. Wrong connection can severely damage the instrument, which is not covered under our warranty. We recommended installing necessary protective device along with the meter like circuit breaker / Fuse/ MCB/ Switch/ Isolator to take care of unexpected faults.

CONNECTION

The meter uses a polycarbonate casing and so is a good insulator. Hence it DOES NOT HAVE ANY EARTH TERMINAL.

Terminal cover is to be used to protect the meter terminals from being tampered with. As soon as the connections are made the terminal block has to be covered and sealed by terminal cover. It can be fixed using two sealable screws.

VENTILATION

No specific ventilation is recommended. Meter is capable of working satisfactory at Ambient between -5 to 60 degree C.

2.2. WIRING THE PREPAID METER

The inputs to be connected to the Prepaid Energy Meter are clearly indicated on the Front Panel.

Connect the Voltage inputs: For LT Models (415 V AC L-Nominal), connect the voltage inputs directly to the terminals. For HT Models, the inputs should be from the secondary of the Potential Transformer. In a 3-wire system, the Neutral terminal is not connected. In a 4-wire system, the neutral may or may not be connected to the terminal marked ‘N’.

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Connect the Current inputs: It is important to maintain the direction of the current flow from S1 to S2. If this reversed in one or more phases, the Power computation will be negative in the corresponding element(s). Though the computation is internally corrected to an equivalent positive value, it is not advisable to leave a reversal of current flow uncorrected.

It is important to adhere to phase relationships. Current ‘IR’ must correspond to the phase that has the Voltage connected to the ‘VR’ terminal. The same holds good for current inputs ‘IY’ and ‘IB’. If the current and voltage inputs are swapped, the Power and Energy computations may be erroneous.

Fig. 1: Connection diagram for Single Phase Prepaid Energy Meter

Fig.2: Connection diagram for Three Phase Prepaid Energy Meter (Whole current

measurement)

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Fig. 3: Connection diagram for CT Operated Three Phase Prepaid Energy Meter

Wire the Dual Input

The Unit is capable of monitoring electricity consumed from two separate sources. One of these could be the supply from the electricity authorities while the other could be from the in-house generator. For the meter to recognize that the supply is from the alternate source, the meter requires a voltage input between 240 V AC that should go live when the supply is from the alternate source as shown in Fig 2.

Wire the Digital Inputs (Max.4)

Integration of Gas and Water with the electrical parameters thereby, extending the flexibility for the user to budget expenses. The four digital inputs, any gas and water meter can be configured. It is important to program the price / Pulse in the corresponding ElNet PPS.

Wire the Communication (RS485)

The Prepaid Energy Meter is equipped with an RS-485 Serial Communication Port or GSM/GPRS and operates on the MODBUS-RTU protocol.

Wire the Remote Unit

The Prepaid Energy Meter is equipped with Remote Unit; it has four terminals, two terminals for 5V supply to Remote Unit and two terminals for RS485 communication to Remote Unit.

2.3. INSTALLING THE METER

The device should be installed in a place where it will not be at risk of damage or near any unauthorized current connection. The sealing of the distributor housing is recommended. The producer is not responsible for any damage caused by improper assembly, service and product maintenance.

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2.3.1. INSTALLING A METER IN A NEW LOCATION

To install the Elmeasure’s prepaid meter in a new location:

• Remove the terminal cover from the meter

• Install the meter in an upright position, using mounting hardware that is appropriate for the

type of surface material

•

Connect the line and load wires to the meter terminals, being careful to use the correct phase, neutral, and line/load configuration

• Turn the supply line power to the meter on

• Test each phase line terminal of the meter to make sure power is on to each phase, and that

the neutrals are connected to the proper terminals

• Test the load terminals of the meter to make sure power is available to each phase of the load.

• Check the display for proper operation of the meter

• Replace the terminal cover. Apply a seal to the sealing screw if necessary or desired. The

installation is complete

2.3.2. REPLACING AN EXISTING METER

To install the Elmeasure’s prepaid meter in a existing meter location: Precaution: Make sure the existing meter and Elmeasure meter mounting mechanism is same.

•

Turn off the line power to the existing meter

Caution: Test existing meter terminals to be sure the voltage is off.

• Remove the line and load wires from the existing meter terminals. Make sure you label the wires, or have a method to identify the line and load wires of each phase, R, Y, B, and neutral, for proper installation in the new meter

• Remove the old meter

• Install the Elmeasure’s prepaid meter in the same location as the previous meter, using

mounting hardware that is appropriate for the type of surface material

• Inspect the line and load wires to make sure they are not damaged or frayed. (Replace if needed.)

• Connect the line and load wires to the meter terminals, being careful to use the correct phase, neutral, and line/load configuration