1

SMART METERING

ROAD MAP FOR DESCO

NOVEMBER 2019

Contents

2

1 Introduction 04 1.1 Briefly describe smart metering 05 1.2 Briefly describe Power line communication (PLC) 05

1.3 Briefly describe Data concentrator unit (DCU) 06

2 Working Procedure 07-08

2.1 Survey 09 2.2 Prepare plan file 10

2.3 Meter installation 11-16

3 Subcontractor Information

3.1 Subcon data 3.2 Necessary information

3.3 Experience 20

4 Visual 20

4.1 Installation secnario 20

3

Abbreviations

PLC - Power line communication

DCU - Data concentrator unit

DESCO - Dhaka Electric Supply Company Limited

AMI - Advanced Metering Infrastructure

Introduction

4

This smart metering road map has been prepared to enhance the operational efficiency of

the Utility like DESCO, improving the quality of the power supply through near-real-time granular

readings provided by smart meters, enhancing the satisfaction of consumers and increasing

consumer participation. However, the benefits of smart metering is not limited only to the NEA

and go beyond various stakeholders as listed below.

Utility Consumers

Reduced Technical & Commercial losses Accurate view of electricity consumption

Improved collection efficiency More reliable supply of electricity to all

consumers

Lower cost of purchased power Higher-quality electricity supply Enhanced

grid visibility Reducing the need for voltage stabilizers Self-healing

power grid; User-friendly and transparent interface with

utilities

5

1.1Smart Meter

A smart meter is an electronic device that records consumption of electric

energy and communicates the information to the electricity supplier for monitoring and billing.

Smart meters typically record energy hourly or more frequently, and report at least daily. Smart

meters enable two-way communication between the meter and the central system.

Communications from the meter to the network may be wireless, or via fixed wired connections

such as power line communication (PLC).

1.2Power Line Communication

Power-line communication (PLC) carries data on a conductor that is also used simultaneously for

AC electric power transmission or electric power distribution to consumers. It is also known

as power-line carrier.There are many communication technologies for smart metering applications,

power line communications (PLC) have proven to be a cost-effective solution in a large number of

scenarios. Moreover, it provides distribution system operator a proprietary communication

network and innately integrates the sensing and communication functionalities. Consequently, it

has become the predominant smart metering technology.

Connection with Data

Acquisition center or master

station through radio,

Ethernet, GPRS

Smart meter

with PLC

module

6

1.3 Data Concentrator Unit

Data concentrator is one important part of Advanced Metering Infrastructure (AMI) system and

Smart prepaid system. Data concentrator is a centralized meter reading terminal, It can collect and

save various types of data of electricity meter by presetting or timing and exchange data with system

master station via wireless module (GPRS) or Ethernet. Data concentrator can reserve a large data

and can ensure that data can be stored for several years. Data concentrator sits on the loop of

secondary of the distribution transformer. Collects Meter reading from all the meters using power line

communication system. The DCU and all the meters are connected to it can be considered as a sub

system. The sub system is set up with a DCI monitoring the low voltage power zone of a distribution

transformer.

GPRS or Ethernet

Smart meter

with PLC module

7

The manpower organogram for prepaid meter installation

1. One project manager.

2. Two assistant project manager will work under project manager.

3. Four supervisors, two supervisors will work under each assistant project manager.

4. Twenty groups means total 4o technicians and 2o hhu operator, five groups will work

under each supervisor.

8

Working Procedure

Group Member in each Group

(1)

Total Group (2)

Installation Qty. Per Group

Per Day (3)

Daily Installation

Qty. 4=(2*3)

Monthly Installation

Qty. 5=(4*25)

2 or 3 20. 25 Nos. 500 Nos. 12,500 Nos.

FINISHED: Hand over the

old meter & cable with goods to

Hesing store

START:Sel ect the Area

and do survey.

Train the Customer

Preliminary

Take the new meter,cable,co

nnection material from Hexing store

Install the Prepaid

meter with cable if required

Fill up the customer

Installation form

Go to site for

Installation Prepaid Meter

9

Meter installation guideline

The installation team shall have a installation sheet instructing them what to do. The following

information shall be printed on the installation form

Customer Name Supplied by the Utility and verified by

Survey

Customer address Supplied by the Utility and verified by

Survey

Customer Number Supplied by the Utility

Old Meter Number & Reading Supplied by the Utility

Tariff Code The specific tariff to be allocated to the

customer must be identified by the tariff code

There are different categories of installations that will be required

Removal of induction & conventional digital meter and direct installation of prepayment

meter with additional wiring or service line work required

Removal of induction & conventional digital meter, re-routing of wiring with replacement

of service connection and installation of pre-payment meter potential joints shall not be

allowed in service drop cable.

Removal of service line and meter, replacement of service connection and installation of

meter.

New customer installation including service connection and installation of pre-payment

meter.

The following guide lines must be followed by the supplier during installation

of the meters

The meters shall be sealed with Ferrule Type/Twist Type seals compatible with the meters

that uniquely identify the utility person who sealed the meters.

Meters shall be tested and commissioned by the installation supervisor using the data from

the works order form to program the tariff details.

10

At the time of meter installation the customer’s induction & conventional digital meter

reading shall be captured on the order by the installation supervisor and the data returned

to the UCC. The date of commissioning is also entered onto the installation form.

The service connections shall not be replaced unless the survey indicates service line with

joints or inadequately rated service lines or bad in selected line.

All meters shall be installed indoors at a location convenient to the customer as well as

service personnel away from sources of heat and moisture.

The installation shall be symmetrical, vertical and parallel to respective walls and floors.

From the points where the service enters customers building, it shall be enclosed

in a

25mm2 PVC pipe until it enters the metering house.

At the time of installation onsite training and instruction shall be given to the customer.

Carefulness

We have to do survey very carefully. We have to confirmed first these meter belongs

which transformer. Otherwise DCU can’t collect data from the meter.

Before installing the meter we have to insert the module into the meter, otherwise DCU

can’t read the meter data.

After completing survey we have to make plan in Microsoft excel using prepaid meter

number.

Plan file Templete

11

Meter Installation

Required Tools

Sl Name of the tools

01 Pliers with PVC insulation

02 Electric Tester

03 Screw Driver Star type with PVC insulation

04 Screw Driver Flat type with PVC insulation

05 Cable Cutter

06 Nose Pliers

07 Hammer

08 Drill Machine

09 Electric Tape

Installation of Meter

Disconnect the load before connection

Connect the service cable and customer side cable according to the connection diagram

on the meter terminal cover. Output connection firstly, Input connection secondly.

When connect the cables, the metal part of cable needs to be fully contacted with two

terminal screws, and ensure that the metal part is not exposed

The terminal screws must be fixed.

Installation Diagram

MODULE

We have to insert the module into the meter before installation

12

Incoming

service

line

Customer

side

Three phase meter installation diagram

Incoming

service

line

Customer

side

Single phase meter installation diagram

13

Load

side

Single Phase

Three Phase

Connection diagram respectively single and three phase

14

DCU installation Diagram

Connection between DCU and CT

15

Successfully install DCU

16

Single

phase

smart

meter

Three

phase

smart

meter

Connection diagram between DCU and Smart Meter

20

Necessary Information

Experience

We have successfully installed around 10k nos smart meter with around 80 no DCU in

West Zone Power Distribution company Limited (WZPDCL) under Ideal Electrical

Enterprise Ltd.

Now We are working in REB 5 lacks project under Hexing Electrical co.,Ltd.

Visual

Here we have shared some visual scenario about our work.

Thank You