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RELIABLE ELECTRICITY METERING
SYSTEMS – REVENUE MANAGEMENT
Nathi & Ntsiki Nkwanyana & Mpiyakhe Mashinini
CONTENTS
Introduction
Meter Engineering Vs Revenue Protection
Procurements of Meters
Revenue Protection Projects
Disconnections & Reconnections
Sweep (Meter Inspections) – Residential & Business Customers (CT Driven
Meters
Installation of Split Prepayment Meters
Removal of Illegal Services
Forensic Investigation
Electrification of Informal Settlements
Protective Structures
Conclusion
The main parameters which define the Electricity Unit (EU) are:
Area of Supply: 2 000 km²
Number of Customers: 711 095 (95% of formalised dwellings)
Number of Employees: Est. 2 300
Peak Demand & Sales: 1 828 MW & 10 745 GWh
Annual Turnover: R 9,4 billion (2012/2013)
Asset Value: R 18,3 billion
Voltage Levels: *275 kV, 132 kV, 33 kV, 11 kV
(*Only municipality with this voltage level.)
Electricity is extremely dangerous, life-threatening and cannot be seen.
It is an essential service required 24 hours a day, 365,days a year. It has huge social
and economic impacts if not managed properly.
Highly technical business requiring highly competent engineering personnel to make
effective decisions to ensure safety compliance in terms of the OHS Act and ensure
electrical network availability.
INTRODUCTION
OUR PROFILE
TOTAL % ENERGY LOSSES – ETHEKWINI
ELECTRICITY
0
2
4
6
8
10
90/91 93/94 96/97 99/00 .02/03 .05/06 .08/09 .11/12
TOTAL % ENERGY LOSSES
TOTAL % ENERGY LOSSES – OTHER
MUNICIPALITY – E…ARTICLE
% Losses
City of Tshwane 11
City Power (Johannesburg) 22
Ekurhuleni 11
eThekwnini (Durban) 6
City of Cape Town 9
Buffalo City (East London) 11
Nelson Mandela Bay (Port Elizabeth) 10
Mangaung-Centlec 11
Electricity losses:
% Losses
Nquthu (KZN) 63
Nxuba (Adelaide) 47
Ngwathe (Parys) 45
Gariep (Burgersdorp) 42
Ulundi 41
Ditsobotla (Lichtenburg) 40
Msukaligwa (Ermelo) 39
Madibeng (Brits) 38
Thembelihle (Hopetown) 37
Govan Mbeki (Secunda) 36
TOTAL % ENERGY LOSSES – OTHER
MUNICIPALITY – WORST PERFORMERS
METER ENGINEERING VS REVENUE
PROTECTION
METER ENGINEERING
The Meter Engineering Branch is responsible for :-
Planning, designing, construction, inspection and maintenance of all commercial
and industrial metering equipment used for billing purposes.
The acquisition, specification and commissioning of new metering technologies.
REVENUE PROTECTION DEFINATION
The steps and actions taken by the utility to Prevent, Eliminate, Minimise and
recover any loss of revenue due to theft or non-payment for services supplied to
consumers.
The principles and practices used for the protection of the environment and
consumers to ensure their safety from any harm, injury and electrocution due to the
unauthorized use of electricity.
METER ENGINEERING BRANCH
• The measurement processes and established rules
Technical Specifications – all types of meters.
All CT/VT driven meters (installation and maintenance)
• Good practice – traceable Calibration and record keeping Test and
calibration
REVENUE PROTECTION BRANCH
• Controlling and managing the uncertainty in the measurement (readings , tampering, meter management )
None Technical Management
• Controlling and managing the uncertainty in the revenue collection (Disconnections) Revenue
Protection
• Controlling and minimize the uncertainty in the network (illegal connections)
Network
REVENUE PROTECTION PROJECTS
Disconnections & reconnections
Meter inspections – Residential & CT Driven Meter Inspection.
The Removal of Illegal connections
Forensic Investigation.
Protective Structures
Strategic Projects :- Installation of Split Prepayment Meters & Electrification of
Informal Settlements.
DISCONNECTIONS & RECONNECTIONS
There are five basic types of disconnections, the reconnections being the reversal of the disconnection process: Normal Disconnections Doctored Disconnection. Hard Disconnections. Remove all Gear (R.A.G.) Service Cable Removal Disconnection
TYPES OF DISCONNECTIONS
DISCONNECTIONS PROCESS
Billing & Customer Mgt Systems
Pending disconnect
ion Pool
Overnight Printing
Field work Execution
Telephone Feedback from the
field
Manual Data
Capture
DISCONNECTIONS & RECONNECTIONS
Financial Year Total No. of
Disconnections
Total No. of
Reconnection
s
Monthly
Average –
DO`s
Recon:Disc
on ratio
2005/2006 129 432 93 520 10 786 0.72
2006/2007 123 047 88 486 10 254 0.72
2007/2008 151 717 114 096 12 643 0.75
2008/2009 173 621 129 020 14 468 0.74
2009/2010 207 473 160 428 17 289 0.77
2010/2011 218 861 166 490 18 238 0.76
DISCONNECTION CHALLENGES
Challenges
T-Joints
Consumer refuses access
Vacant properties
Level 1 Disconnector
unable to climb poles
Resolutions
Cutting in of CDUs
Use of GIS to locate supply
Ascertain owner contact details
Request supervisors to
do the disconnection
Revenue Protection started pilot project in 2006 to protect meter
kiosks.
Asset protection to ensure minimal energy losses (non-technical).
Protective enclosures over meter kiosks to prevent unauthorised
access and damage.
Enclosure has high security features.
It can be monitored and controlled remotely
THE PROTECTIVE STRUCTURES
Meter Room doors were vandalised
Tenants were tampering with units
Loss of revenue
THE PROTECTIVE STRUCTURES
Revenue Protection started pilot project in 2006 to protect meter
kiosks.
Asset protection to ensure minimal energy losses (non-technical).
Protective enclosures over meter kiosks to prevent unauthorised
access and damage.
Enclosure has high security features.
It can be monitored and controlled remotely
THE PROTECTIVE STRUCTURES
Revenue generation - Consumers pay for electricity
Assets protected – No tampering/ vandalism
Improved monitoring
Increased safety
THE PROTECTIVE STRUCTURES
OUTCOME
The provision of electricity leads to job creation, and a
subsequent rise in disposable income in a community.
A standard has been developed by Electricity Department to
safely electrify informal settlements.
Most of communities living in the informal settlements have been
without electricity for over 15 years.
Most of these communities are indigent as per Council policy and
should qualify for free basic electricity after the connections have
been made.
THE ELECTRIFICATION OF INFORMAL
SETTLEMENTS
The provision of electricity leads to job creation, and a
subsequent rise in disposable income in a community
A standard has been developed by Electricity Department
to safely electrify informal settlements.
Most of communities living in the informal settlements
have been without electricity for over 15 years.
– Most of these communities are indigent as per
Council policy and should qualify for free basic
electricity after the connections have been made.
THE ELECTRIFICATION OF INFORMAL
SETTLEMENTS
The Council resolution was taken to not supply electricity
where there are following issues:
Houses built where there is soil erosion
Houses built on and around the swamp / flood – prone areas
Houses built underneath High Voltage line and around that
servitude
Houses built on road / Spoornet or Rail servitudes
Houses built where there are environmental issues
Houses built on Private land
Houses built where there are any other Health and Safety
hazards
THE ELECTRIFICATION OF INFORMAL
SETTLEMENTS