N R S
NRS Information Brochure
2006
Information from the Electricity Suppliers
Liaison Committee
NRS information
Contents
Page
1 Introduction and membership of the ESLC .............................................................................
3
2 Message from the ESLC .........................................................................................................
3
3 NRS publications .....................................................................................................................
4
4 Categorization of NRS specifications ......................................................................................
12
5 Accessing the NRS specifications …. ......................................................................................
14
6 Previous NRS award winners .. ...............................................................................................
14
7 ESLC strategic interventions .. .................................................................................................
15
8 NRS PMA details .....................................................................................................................
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9 Information on TESCOD .. .......................................................................................................
16
NRS website: www.nrs.eskom.co.za
2
Email queries to nrs@eskom.co.za
NRS information
1
Introduction
NRS specifications, covering a range of electro-technical topics as well as guidelines for
sound business practice/s, are developed for use in the Electricity Supply Industry (ESI) in
South Africa. The NRS Project Management Agency (PMA) manages the development of the
specifications on behalf of the Electricity Suppliers Liaison Committee (ESLC).
The NRS specifications are developed in collaboration with Standards South Africa (StanSA),
the standards division of the South African Bureau of Standards (SABS).
The ESLC comprises the following members:
2
Roy Wienand (Chairperson)
eThekwini Municipality
Nick Bailey
Eskom, R&S IARC
Adolf Claasen
StanSA
William de Villiers
EDI Holdings Co.
Peter Fowles
AMEU Technical Secretary
Danie van Wyk
AMEU
Mohammed Ally
City of Johannesburg [City Power]
George Ferriera
Nelson Mandela Municipality
Ryno van der Riet
City of Cape Town
Vinod Singh
NRS PMA Eskom R&S, IARC
Dr. William Dykman
Tshwane Municipality
Hannes Roos
Ekurhuleni Municipality
Richard Mc Currach
Eskom Transmission
Jaco van Heerden
SABS NETFA
Leon Kritzinger
Mangaung Municipality [Centlec]
Paul Johnson
Regional liaison (Eskom R&S, IARC)
Alvin Fredericks (Secretary)
NRS PMA Eskom R&S, IARC
Message from the ESLC
The ESLC acknowledges those who have contributed to the development of numerous NRS
specifications. The NRS standardization programme has been in existence since 1990 in
which time over 100 NRS specifications have been developed through the dedication and
contribution by employees of Eskom and the municipalities, equipment suppliers and
manufacturers as well as industry consultants and academics.
The ESLC will continue to provide leadership in the industry through value adding
standardization activities and programmes.
NRS website: www.nrs.eskom.co.za
3
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NRS information
The following terms describe the status of the respective NRS specification:
Term
Being
developed
Interim
Explanation
A first edition of the specification is in the process of being developed.
Obsolete
Project
cancelled
Published
Under review
Withdrawn and
replaced
Interim specifications are approved by the working group for use in the industry but
have not been approved by the ESLC as the information is still being developed.
A published edition of the specification was withdrawn as the information contained
therein was no longer required in the industry.
A specification, approved for development but subsequently cancelled.
A published edition of the specification is available.
A published edition of the specification is available but the specification is under
review by the working group.
A published edition of the specification was withdrawn and replaced by an
equivalent/current specification.
N R S publications
N R S
NRS
Number
Document Title
Status
NRS 000
RATIONALIZED USER DEFINITIONS FOR USE IN THE ELECTRICITY Published
SUPPLY INDUSTRY
NRS 001
GUIDELINE FOR DRAFTING AND PRESENTATION OF TECHNICAL
STANDARDS
Published
NRS 002
GRAPHICAL SYMBOLS FOR ELECTRICAL DIAGRAMS
Under Review
Note: (Symbols are available in .dgn and .dxf format).
NRS 003-1
METAL CLAD SWITCHGEAR FOR RATED A.C. VOLTAGES ABOVE
1 kV AND UP TO AND INCLUDING 24 kV.
Under Review
Note: NRS 003-1 was adopted by StanSA as SANS 1885 and the NRS specification was withdrawn.
SANS 1885 is currently under review and will be published as a dual numbered SANS/NRS standard.
Further it is expected that the information in NRS 003-2 will be incorporated into this dual numbered
documents and NRS 003-2 will be withdrawn.
NRS 003-2
Under Review
METAL CLAD SWITCHGEAR - FOR RATED A.C VOLTAGE ABOVE
1 kV AND UP TO AND INCLUDING 24 kV - PART 2: STANDARDIZED
PANELS
NRS 004
MINI-SUBSTATIONS FOR RATED A.C. VOLTAGES UP TO AND
INCLUDING 24 kV
Under Review
Note: NRS 004 was adopted by StanSA as SANS 1029 and the NRS specification was withdrawn.
SANS 1029 is currently under review and will be published as a dual numbered SANS/NRS standard.
NRS 005
DISTRIBUTION TRANSFORMERS: PREFERRED REQUIREMENTS
FOR APPLICATION IN THE ELECTRICITY SUPPLY INDUSTRY
Withdrawn and
replaced by
SANS 780
NRS 006
SWITCHGEAR - METAL-ENCLOSED RING MAIN UNITS - FOR
RATED A.C. VOLTAGES ABOVE 1 kV AND UP TO AND INCLUDING
24 kV
Under Review
Note: NRS 006 was adopted by STANSA as SANS 1874 and the NRS specification was withdrawn.
NRS website: www.nrs.eskom.co.za
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SANS 1874 is currently under review and will be published as a dual numbered SANS/NRS standard.
NRS 007
HIGH PRESSURE HIGH TEMPERATURE VALVES
Obsolete
NRS 008
ENCLOSURES FOR CABLE TERMINATIONS IN AIR - CLEARANCE
FOR 7,2 kV AND UP TO AND INCLUDING 36 kV
Withdrawn and
replaced by
NRS 012
NRS 009-1
ELECTRICITY SALES SYSTEMS - PART 1, GLOSSARY AND
SYSTEM OVERVIEW
Withdrawn and
replaced by
SANS 1524-1
NRS 009-2
series
ELECTRICITY SALES SYSTEMS - PART 2: FUNCTIONAL AND
PERFORMANCE REQUIREMENTS
Published
Note – NRS 009-2 comprises several sections. More information can be obtained from the NRS website
www.nrs.eskom.co.za.
NRS 009-2-6 ELECTRICITY SALES SYSTEMS - PART 2: FUNCTIONAL AND
PERFORMANCE REQUIREMENTS. SECTION 6 - MINIMUM
FUNCTIONAL REQUIREMENTS FOR A POINT OF SALE
Under
development
NRS 009-3
ELECTRICAL SALES SYSTEMS - PART 3: DATABASE FORMAT
Published
NRS 009-4
ELECTRICITY SALES SYSTEMS - PART 4: NATIONAL
PREPAYMENT ELECTRICITY METER CARDS
Published
NRS 009-5
ELECTRICITY SALES SYSTEMS - PART 5: TESTING OF
SUBSYSTEMS
Published
NRS 009-6
series
ELECTRICITY SALES SYSTEMS - PART 6: INTERFACE
STANDARDS
Published
Note: NRS 009-6 comprises several sections. More information can be obtained from the NRS website
www.nrs.eskom.co.za.
NRS 009-6-10 ELECTRICITY SALES SYSTEMS – PART 6: INTERFACE
(2nd Interim)
STANDARD - SECTION 10: ONLINE VENDING SERVER VENDING CLIENT/S
Under review
NRS 009-7
ELECTRICITY SALES SYSTEMS - PART 7: STANDARD
TRANSFER SPECIFICATION / THE MANAGEMENT OF
CRYPTOGRAPHIC KEYS
Published
NRS 009-8
ELECTRICITY SALES SYSTEMS - PART 4: NATIONAL
PREPAYMENT ELECTRICITY METER CARDS
Published
EBSST
Addendum
INTERIM AMENDMENTS TO NRS 009-2-1; NRS 009-2-2;
NRS 009-3 AND NRS 009-6-3
Published
NRS 010
BATTERIES
Withdrawn and
replaced by
SANS 1632
NRS 011
PILOT CABLES
Published
NRS 012
CABLE TERMINATIONS AND LIVE CONDUCTORS WITHIN AIRUnder Review
INSULATED ENCLOSURES (INSULATION CO-ORDINATION) FOR
RATED A.C. VOLTAGES OF 7.2 kV AND UP TO AND INCLUDING
36 kV
NRS 013
MEDIUM -VOLTAGE CABLES
Under review
NRS 014
FIXED RADIO EQUIPMENT - PREFERRED REQUIREMENTS FOR
MOBILE SERVICE APPLICATIONS
Obsolete
NRS 015
LUBRICANTS AND ALLIED PRODUCTS
Obsolete
NRS 016
CODE OF PRACTICE FOR THE EARTHING OF LOW-VOLTAGE
DISTRIBUTION SYSTEMS
Withdrawn and
replaced by
SANS 0292
NRS 017-1
SINGLE-PHASE CABLE FOR AERIAL SERVICE CONNECTIONS
PART 1: SPLIT-CONCENTRIC CABLE
Withdrawn and
replaced by
NRS website: www.nrs.eskom.co.za
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NRS 063
NRS 017-2
SINGLE-PHASE CABLE FOR AERIAL SERVICE CONNECTIONS PART 2: CONCENTRIC CABLES
Withdrawn and
replaced by
NRS 062
Note NRS 017 parts 1 and 2 were initially replaced by NRS 062 and NRS 063, which were subsequently
replaced by SANS 1507-6.
NRS 018-1
FITTINGS AND CONNECTORS FOR LOW- VOLTAGE OVERHEAD
POWER LINES USING AERIAL BUNDLED CONDUCTORS - PART 1:
STRAIN AND SUSPENSION FITTINGS FOR SELF-SUPPORTING
CONDUCTORS
Published
NRS 018-2
FITTINGS AND CONNECTORS FOR LOW-VOLTAGE OVERHEAD
POWER LINES USING AERIAL BUNDLED CONDUCTORS - PART 2:
STRAIN AND SUSPENSION FITTINGS FOR INSULATED NEUTRAL
SUPPORTING CONDUCTORS
Published
NRS 018-3
FITTINGS AND CONNECTORS FOR LOW-VOLTAGE OVERHEAD
POWER LINES USING AERIAL BUNDLED CONDUCTORS - PART 3:
STRAIN AND SUSPENSION FITTINGS FOR BARE NEUTRAL
SUPPORTING CONDUCTORS
Published
NRS 018-4
FITTINGS AND CONNECTORS FOR LOW-VOLTAGE OVERHEAD
POWER LINES USING AERIAL BUNDLED CONDUCTORS - PART 4:
STRAIN AND SUSPENSION FITTINGS FOR AERIAL SERVICE
CABLES
Published
NRS 018-5
FITTINGS AND CONNECTORS FOR LOW-VOLTAGE OVERHEAD
POWER LINES USING AERIAL BUNDLED CONDUCTORS - PART 5:
CURRENT-CARRYING CONNECTORS AND JOINTS
Published
NRS 019
ELECTRICITY DISTRIBUTION - SMALL POWER DISTRIBUTION
UNITS (READY BOARDS) FOR SINGLE-PHASE 230 V SERVICE
CONNECTIONS
Withdrawn and
replaced by
SANS 1619
NRS 020
ELECTRICITY DISTRIBUTION - CABLE TIES FOR USE WITH LOW
VOLTAGE AERIAL BUNDLED CONDUCTORS
Published
NRS 021
COVERED CONDUCTOR
Project cancelled
NRS 022
ELECTRICITY DISTRIBUTION - STAYS AND ASSOCIATED
COMPONENTS
Under review
NRS 023
RECOMMENDED PRACTICE FOR LOW COST RETICULATION
Withdrawn and
replaced by
NRS 034-3
NRS 024
DIESEL ALTERNATOR SETS
Withdrawn and
replaced by
SANS 8528
NRS 025
PHOTOELECTRIC CONTROL UNITS FOR LIGHTING (PECUs).
KEYWORDS: LIGHTING; CONTROL UNITS; PHOTOELECTRIC;
SPECIFICATIONS
Withdrawn and
replaced by
SANS 1777
NRS 026
BATTERY CHARGERS - INDUSTRIAL TYPE FOR RATED A.C.
VOLTAGES UP TO AND INCLUDING 525 V
Withdrawn and
replaced by
SANS 1652
NRS 027
DISTRIBUTION TRANSFORMERS - COMPLETELY SELFPROTECTING TYPE
Withdrawn and
replaced by
SANS 780
NRS 028
CABLE LUGS AND FERRULES - FOR COPPER AND ALUMINIUM
CONDUCTORS
Published
NRS 029
CURRENT TRANSFORMERS FOR RATED A.C. VOLTAGES FROM
3,6 kV UP TO AND INCLUDING 420 kV (MAXIMUM VOLTAGE FOR
EQUIPMENT)
Published
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NRS 030
Published
ELECTRICITY DISTRIBUTION - INDUCTIVE VOLTAGE
TRANSFORMERS FOR RATED A.C. VOLTAGES FROM 3.6 kV UP TO
AND INCLUDING ELECTRICITY DISTRIBUTION 145 kV FOR
INDOOR AND OUTDOOR APPLICATION
NRS 031
ALTERNATING CURRENT DISCONNECTORS AND EARTHING
SWITCHES (ABOVE 1000 V)
Published
NRS 032
SERVICE DISTRIBUTION BOXES - POLE-MOUNTED TYPES - FOR
OVERHEAD SINGLE-PHASE A.C. SERVICE CONNECTIONS AT
230 V
Published
NRS 033
ELECTRICITY DISTRIBUTION - GUIDELINES FOR THE
APPLICATION DESIGN, PLANNING AND CONSTRUCTION OF
MEDIUM VOLTAGE OVERHEAD POWER LINES UP TO AND
INCLUDING 22 kV, USING WOODEN POLE STRUCTURES AND
BARE CONDUCTORS
Under review
Note: The overhead lines construction information in NRS 033 will be removed and published in NRS
093. NRS 033 will be reviewed and will serve as an application guideline for SANS 10280 for
applications up to and including 132 kV. SANS 10280 will be incorporated into the Electrical Machinery
Regulations and will be published as a dual numbered “NRS 041- SANS 10280” specification.
NRS 034-0
ELECTRICITY DISTRIBUTION - GUIDELINES FOR THE PROVISION
OF ELECTRICAL DISTRIBUTION NETWORKS IN RESIDENTIAL
AREAS - PART 0: DEFINITIONS
Under review
The definitions in NRS 034-0 will be incorporated in NRS 000 and NRS 034-0 will be withdrawn.
NRS 034-1
ELECTRICITY DISTRIBUTION - GUIDELINES FOR THE PROVISION
OF ELECTRICAL DISTRIBUTION NETWORKS IN RESIDENTIAL
AREAS - PART 1: PLANNING AND DESIGN OF DISTRIBUTION
SYSTEMS
Under review
NRS 034-2-3 ELECTRICITY DISTRIBUTION - GUIDELINES FOR THE PROVISION Under review
OF ELECTRICAL DISTRIBUTION NETWORKS IN RESIDENTIAL
AREAS - PART 2-3: PREFERRED METHODS AND MATERIALS FOR
THE INSTALLATION OF OVERHEAD POWER LINES
NRS 034-3
ELECTRICITY DISTRIBUTION - GUIDELINES FOR THE PROVISION
OF ELECTRICAL DISTRIBUTION NETWORKS IN RESIDENTIAL
AREAS - PART 3: OVERHEAD DISTRIBUTION IN VERY LOW, LOW
AND MODERATE CONSUMPTION AREAS, INCLUDING RURAL
AREAS AND INFORMAL SETTLEMENTS
Under review
NRS 035-1
OUTDOOR DISTRIBUTION CUT-OUTS - PART 1: DROP-OUT
FUSE-LINK ASSEMBLIES OR SOLID-LINK ASSEMBLIES POLE-MOUNTED TYPES - FOR NOMINAL A.C. VOLTAGES
UP TO AND INCLUDING 33 kV
Published
NRS 035-2
OUTDOOR DISTRIBUTION CUT-OUTS - PART 2: EXPULSION
FUSE-LINKS - FOR NOMINAL A.C. VOLTAGES UP TO AND
INCLUDING 33 kV
Published
NRS 036-1
AUTO-RECLOSERS AND SECTIONALIZERS - POLE-MOUNTED
TYPES - PART 1: AUTO-RECLOSERS WITH LOCAL AND REMOTE
CONTROL CAPABILITIES FOR NOMINAL A.C. VOLTAGES UP TO
33 kV
Under review
NRS 036-2
AUTO-RECLOSERS AND SECTIONALIZERS - POLE-MOUNTED
TYPES - PART 2: AUTO-RECLOSERS THAT HAVE
PROGRAMMABLE PROTECTION FEATURES AND ONLY LOCAL
CONTROL - FOR NOMINAL A.C. VOLTAGES UP TO 22 kV
Under review
NRS 036-3
Published
AUTO-RECLOSERS AND SECTIONALIZERS - POLE-MOUNTED
TYPES - PART 3: SECTIONALIZERS FOR NOMINAL A.C. VOLTAGES
UP TO 22 kV
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NRS 037-1
TELECONTROL PROTOCOL - PART 1: TELECONTROL PROTOCOL Under review
FOR STAND-ALONE REMOTE TERMINAL UNITS
NRS 037-2
TELECONTROL PROTOCOL - PART 2: TELECONTROL PROTOCOL Under
FOR INTEGRATED SUBSTATION CONTROL
development
NRS 037-3
TELECONTROL PROTOCOL - PART 3: INTER-CONTROL CENTRE
COMMUNICATION PROTOCOL.
Published
NRS 038-1
ELECTRICITY DISTRIBUTION - CONCRETE POLES - PART 1:
CONCRETE POLES FOR LOW-VOLTAGE AND MEDIUM-VOLTAGE
OVERHEAD DISTRIBUTION SYSTEMS
Under review
NRS 038-2
ELECTRICITY POLES - CONCRETE POLES - PART 2: CONCRETE
POLES FOR LIGHTING APPLICATION
Under review
NRS 039-1
SURGE ARRESTERS FOR USE IN DISTRIBUTION SYSTEMS –
PART 1: GUIDE FOR THE APPLICATION OF GAPLESS METALOXIDE SURGE ARRESTERS
Under review
NRS 039-2
SURGE ARRESTERS FOR USE IN DISTRIBUTION SYSTEMS –
PART 2: DISTRIBUTION CLASS, GAPLESS METAL-OXIDE SURGE
ARRESTERS
Under review
NRS040-1
NETWORK OPERATING - DEFINITIONS
Under review
Note: The definitions in NRS 040-1 will be included in NRS 000 and NRS 040-1 will be withdrawn
NRS 040-2
NETWORK OPERATING - VOLTAGE COLOUR CODING FOR
DIAGRAMMATIC DISPLAYS IN CONTROL ROOM - COLOUR
CODING FOR WALL-MOUNTED OPERATING DIAGRAMS AND
ELECTRONIC DISPLAYS RELATING TO THE GENERATION,
TRANSMISSION AND DISTRIBUTION OF ELECTRICITY
NRS 040-3
NETWORK OPERATING - RECOMMENDED MODEL REGULATIONS Under review
RELATING TO POWER SYSTEMS FOR OPERATING, ACCESS
CONTROL AND SUPERVISION OF SYSTEMS THAT EXCEED 1000
V, FOR THE TRANSMISSION AND DISTRIBUTION OF ELECTRICITY
NRS 040-4
NETWORK OPERATING - RECOMMENDED MODEL FOR THE
TRAINING, COMPETENCY ASSESSMENT AND AUTHORISATION
OF THE ELECTRICITY SUPPLY INDUSTRY FOR NETWORK
OPERATIONS
Being developed
NRS 040-5
NETWORK OPERATING - STANDARD PROCEDURE AND
TERMINOLOGY FOR THE ISSUING OF OPERATING
INSTRUCTIONS
Being developed
NRS 040-6
NETWORK OPERATING - EARTHING CODE OF PRACTICE
Being developed
Published
Note: The main title of the NRS 040 series is to be changed from ‘HV Operating Regulations’ to ‘Network
Operating’
NRS 041 ELECTRICITY TRANSMISSION AND DISTRIBUTION - CODE OF
SANS 10280 PRACTICE FOR OVERHEAD POWER LINES FOR CONDITIONS
PREVAILING IN SOUTH AFRICA
Under review
Note: NRS 041 was adopted by StanSA as SANS 0280 and the NRS specification was withdrawn.
SANS 0280 is currently under review and will be published as a dual numbered SANS-NRS standard.
NRS 042
GUIDE FOR THE PROTECTION OF ELECTRONIC EQUIPMENT
AGAINST DAMAGING TRANSIENTS
Published
NRS 043
CODE OF PRACTICE FOR THE JOINT USE OF STRUCTURES FOR
POWER AND TELECOMMUNICATION LINES
Published
NRS website: www.nrs.eskom.co.za
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NRS 044
WORKING PROCEDURES AND STANDARDS IN RESPECT OF
THE INSTALLATION OF NEW ELECTRICAL WORKS AND
TELECOMMUNICATION FACILITIES, OR THE EXTENSION OR
MODIFICATION OF SUCH EXISTING WORKS AND FACILITIES
Published
NRS 045
NATIONAL ACCOUNT CARDS FOR ELECTRICITY CONSUMERS
Obsolete
NRS 046
ELECTRICITY DISTRIBUTION - LOAD-BREAK SWITCHDISCONNECTORS - POLE-MOUNTED TYPE FOR RATED A.C.
VOLTAGES ABOVE 1 kV AND UP TO AND INCLUDING 36 kV
Published
NRS 047-1
QUALITY OF SERVICE - PART 1: MINIMUM STANDARDS
Under review
NRS 047-2
QUALITY OF SERVICE - PART 2: REPORTING GUIDELINES
Published
NRS 048-1
QUALITY OF SUPPLY - PART 1: OVERVIEW OF IMPLEMENTATION
OF STANDARDS AND PROCEDURES
Withdrawn
NRS 048-2
QUALITY OF SUPPLY - PART 2: VOLTAGE CHARACTERISTICS,
COMPATIBILITY LEVELS, LIMITS AND ASSESSMENT METHODS
Under review
NRS 048-3
QUALITY OF SUPPLY - PART 3: PROCEDURES FOR
MEASUREMENT AND REPORTING
Withdrawn and
replaced by the
NER directive
NRS 048-4
QUALITY OF SUPPLY - PART 4: APPLICATION GUIDELINES FOR
UTILITIES
Under review
NRS 048-5
QUALITY OF SUPPLY - PART 5: INSTRUMENTATION AND
TRANSDUCERS FOR VOLTAGE QUALITY MONITORING AND
RECORDING
Withdrawn and
replaced by
SANS 1816
NRS 049
TIME OF USE METERING
Project cancelled
NRS 050
WATER SUPPLY COMPONENTS (SABS PROJECT)
Project cancelled
NRS 051
SUSPENSION AND STRAIN FITTINGS FOR INSULATED
Under review
SUPPORTING CONDUCTORS USED IN MEDIUM VOLTAGE AERIAL
BUNDLED SYSTEMS
NRS 052-1
PHOTOVOLTAIC SYSTEMS FOR USE IN INDIVIDUAL HOMES PART 1: STANDARDIZED REQUIREMENTS APPLICABLE TO
INDIVIDUAL HOMES REMOTE FROM THE ELECTRICITY GRID
Under review
NRS 052-2
PHOTOVOLTAIC SYSTEMS FOR USE IN INDIVIDUAL HOMES PART 2: TEST PROCEDURES FOR MAIN COMPONENTS
Under review
Note: NRS 052-2 comprises several sections. More information can be obtained from the NRS website
www.nrs.eskom.co.za.
NRS 053
ACCESSORIES FOR MEDIUM-VOLTAGE POWER CABLES (3,8/6,6
kV TO 19/33 kV
Under review
NRS 054
POWER TRANSFORMERS
Under review
NRS 055
CODE OF PRACTICE FOR REVENUE PROTECTION
Under review
NRS 056-1
SERVICE DISTRIBUTION BOXES - METER KIOSKS AND
DISTRIBUTION KIOSK, PART 1: LOW-VOLTAGE NON-STEEL
METER KIOSKS FOR USE IN UNDERGROUND NETWORKS
Published
NRS 056-2
SERVICE DISTRIBUTION BOXES - METER KIOSKS AND
DISTRIBUTION KIOSK, PART 2: SPECIFICATION FOR GROUNDMOUNTED, LOW-VOLTAGE DISTRIBUTION KIOSKS
Published
NRS 056-3
SERVICE DISTRIBUTION BOXES - METER KIOSKS AND
DISTRIBUTION KIOSKS, PART 3: SPECIFICATION FOR LOWVOLTAGE STEEL METER KIOSKS FOR USE IN UNDERGROUND
Published
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NETWORKS
NRS 057
CODE OF PRACTICE FOR ELECTRICITY METERING
Published
NRS 058
(Interim)
COST OF SUPPLY METHODOLOGY
Published
NRS 059
RECOMMENDATIONS TO MINIMIZE PROBLEMS ASSOCIATED
WITH THE THEFT OF TRANSFORMER NEUTRAL AND NEUTRAL
EARTHING COPPER CONDUCTORS
Published
NRS 060
CODE OF PRACTICE FOR CLEARANCES FOR ELECTRICAL
SYSTEMS WITH RATED VOLTAGES UP TO AND INCLUDING
145 kV, FOR THE SAFETY OF PERSONS
Published
NRS 061-1
SPECIFICATION FOR OVERHEAD GROUND WIRE WITH
OPTICAL FIBRE - PART 1: PRODUCT SPECIFICATION
Published
NRS 061-2
SPECIFICATION FOR OVERHEAD GROUND WIRE WITH OPTICAL
FIBRE - PART 2: INSTALLATION GUIDELINES
Published
NRS 062
CONCENTRIC SINGLE-PHASE AERIAL SERVICE CABLE - FOR
DOMESTIC SERVICE CONNECTIONS WITH A COMBINED
NEUTRAL-EARTH CONDUCTOR
Withdrawn and
replaced by
SANS 1507-6
NRS 063
SPLIT-CONCENTRIC SINGLE-PHASE AERIAL SERVICE CABLE FOR DOMESTIC SERVICE CONNECTIONS WITH SEPARATE
NEUTRAL AND EARTH CONDUCTORS
Withdrawn and
replaced by
SANS 1507-6
NRS 064
GUIDELINE FOR THE EXCHANGE OF SPATIAL INFORMATION IN
THE ELECTRICITY SUPPLY INDUSTRY
Published
NRS 065
CONTRACT SPECIFICATIONS
Project
Cancelled
NRS 066
MEDIUM VOLTAGE INSULATORS
Published
NRS 067
COMPACT CUBICLE, FIXED PATTERN, SWITCHGEAR FOR RATED
A.C. VOLTAGES FROM 12 KV UP TO AND INCLUDING 36 KV.
Under review
NRS 068
ELECTRICITY DISTRIBUTION - CABLE EARTH FAULT INDICATOR
Published
NRS 069
CODE OF PRACTICE FOR THE RECOVERY OF CAPITAL COSTS
FOR DISTRIBUTION NETWORK ASSETS
Published
NRS 070
QUALITY OF SERVICE STANDARD FOR NON-GRID ELECTRICITY
CUSTOMERS
Published
NRS 071
AUTOMATED METER READING FOR LARGE POWER USERS
Published
NRS 072
OVERHEAD LINE FAULT PATH INDICATORS
Published
NRS 073
WOOD POLES, CROSS-ARMS AND SPACER BLOCKS
Under review
NRS 074-1
LOW-VOLTAGE (600/1 000 V) CABLE SYSTEMS FOR
UNDERGROUND ELECTRICAL DISTRIBUTION PART 1: CABLES
Under review
NRS 075
MECHANICAL TORQUE SHEAR CONNECTORS
Published
NRS 076
EARTHING OF DISTRIBUTION SUBSTATIONS WITH NOMINAL
VOLTAGES UP TO AND INCLUDING 132 kV
Published
NRS 077
XPLE-INSULATED CABLES AND ACCESSORIES FOR SYSTEM
WITH NOMINAL VOLTAGES OF 44 kV, 66 kV, 88 kV AND 132 kV
Published
NRS 078-1
LONG-SPAN ALL-DIELECTRIC SELF-SUPPORTING FIBRE OPTIC
CABLES, PART 1: PRODUCT SPECIFICATION
Published
NRS website: www.nrs.eskom.co.za
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NRS 078-2
LONG-SPAN ALL-DIELECTRIC SELF-SUPPORTING FIBRE OPTIC
CABLES, PART 2: INSTALLATION GUIDELINES
Published
NRS 079-1
MINERAL INSULATING OILS (UNINHIBITED) PART 1: PURCHASE,
MANAGEMENT, MAINTENANCE AND TESTING
Published
NRS 079-2
MINERAL INSULATING OILS (UNINHIBITED) Part 2: GUIDELINES
FOR THE MANAGEMENT OF INSULATING OIL
Being developed
NRS 080
QUANTIFYING AND REPORTING OF ENERGY LOSSES IN
ELECTRICITY DISTRIBUTION NETWORKS
Published
NRS 081
SINGLE-MODE NON-DISPERSION SHIFTED OPTICAL FIBRES
Published
NRS 082
RECOMMENDED MAINTENANCE POLICY FOR ELECTRICITY
NETWORKS
Published
NRS 083
CODE OF PRACTICE FOR THE APPLICATION OF EMC
STANDARDS AND GUIDELINES IN THE TRANSMISSION AND
DISTRIBUTION NETWORKS
Being developed
NRS 084
ESI ELECTRONIC INFORMATION EXCHANGE
Being developed
NRS 085-1
STANDARD FOR MINERAL INSULATING OILS POLYCHLORINATED BIPHENYLS– GUIDELINES TO DEVELOP A
PHASE-OUT PLAN
Project cancelled
NRS 085-2
STANDARD FOR MINERAL INSULATING OILS - GUIDELINES FOR
DISPOSAL
Project cancelled
NRS 086
DEMAND SIDE MANAGEMENT – CODE OF PRACTICE
Being developed
NRS 087
GUIDELINES FOR THE PURCHASE USE AND DISPOSAL OF SF6
Being developed
NRS 088
SINGLE MODE FIBRE OPTIC DUCT CABLES
Being developed
NRS 089-1
interim
MAINTENANCE OF ELECTRICITY NETWORKS - PART 1: POWER
CABLES
Under review
NRS 089-2-1 MAINTENANCE OF ELECTRICITY NETWORKS - PART 2:
interim
OVERHEAD DISTRIBUTION SYSTEMS – SECTION 1: OVERHEAD
LINES
Under review
NRS 089-2-2 MAINTENANCE OF ELECTRICITY NETWORKS - PART 2:
interim
OVERHEAD DISTRIBUTION SYSTEMS – SECTION 2: INSPECTION
AND SUPPLEMENTAL TREATMENT OF TREATED WOOD UTILITY
POLES
Under review
NRS 089-2-3 MAINTENANCE OF ELECTRICITY NETWORKS - PART 2:
Under review
interim
OVERHEAD DISTRIBUTION SYSTEMS – SECTION 3: THE MANUAL
REPLACEMENT OF A ROTTEN WOODEN POLE STRUCTURE
NRS 089-2-4 MAINTENANCE OF ELECTRICITY NETWORKS - PART 2:
interim
OVERHEAD DISTRIBUTION SYSTEMS – SECTION 4: CLEARING
AND MAINTENANCE OF SERVITUDE ROUTES
Under review
NRS 089-3-1 MAINTENANCE OF ELECTRICITY NETWORKS – PART 3
interim
SUBSTATION- SECTION 1: GENERAL
Under review
NRS 089-3-2 MAINTENANCE OF ELECTRICITY NETWORKS – PART 3
interim
SUBSTATION- SECTION 2: POWER TRANSFORMER, CIRCUIT
BREAKERS, ISOLATORS AND INSTRUMENT TRANSFORMERS
Under review
NRS 089-3-3 MAINTENANCE OF ELECTRICITY NETWORKS – PART 3
Under review
interim
SUBSTATION- SECTION 3: MINIATURE SUBSTATIONS,
DISTRIBUTION TRANSFORMERS AND ELECTRICAL ENCLOSURES
NRS 089-4
interim
MAINTENANCE OF ELECTRICITY NETWORKS – PART 4: CONTROL Under review
TECHNOLOGIES
NRS website: www.nrs.eskom.co.za
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NRS 089-5-1 MAINTENANCE OF ELECTRICITY NETWORKS – PART 5: STREET
interim
AND AREA LIGHTING- SECTION 1: STREETLIGHTING
MAINTENANCE PLANNING
Under review
NRS 089-5-2 MAINTENANCE OF ELECTRICITY NETWORKS – PART 5: STREET
interim
AND AREA LIGHTING- SECTION 2: STREETLIGHTING
Under review
NRS 089-5-3 MAINTENANCE OF ELECTRICITY NETWORKS – PART 5: STREET
interim
AND AREA LIGHTING- SECTION 3: HIGH MAST
Under review
NRS 090
MAINTENANCE WORK EXECUTION
Being developed
NRS 091
HEALTH AND SAFETY GUIDELINES
Being developed
NRS 092
CONSTRUCTION GUIDELINES FOR OVERHEAD DISTRIBUTION
Being developed
NRS 093
GUIDELINES FOR ELECTRICITY DISTRIBUTION NETWORK
ASSETS MANAGEMENT
Being developed
4
Categorization of NRS specifications
Information and Data
NRS 064, NRS 084
Health, Safety and Risk
Health and Safety
NRS 091
Safety clearances
NRS 060
Shared power and telecommunication lines
NRS 043, NRS 044
Conductor theft
NRS 059
Electro-magnetic compatibility (EMC)
NRS 083
Non technical losses
NRS 080
Networking Operating
NRS 040 series
Retail Business and Electricity Pricing
Quality of service
NRS 047, NRS 070
Revenue Protection
NRS 055
Cost of supply and recovery of capital costs
NRS 058, NRS 069
Electricity metering and sales systems
009, 057, 071
NRS website: www.nrs.eskom.co.za
12
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NRS information
Planning Design and Construction of Electricity Distribution Network
Planning & Design of Distribution Networks
NRS 034
Overhead lines
NRS 041, NRS 033
Construction of Overhead Lines
NRS 092
Substation earthing
NRS 076
Control plant
011, 037
Optical fibre
NRS 061, NRS 078, NRS 081, NRS 088
Maintenance and Performance of Electricity Distribution Network
Maintenance of Distribution Networks
NRS 082, NRS 089 series, NRS 090
Insulating oils and gases
NRS 079, NRS 085, NRS 087
Network performance & Quality of Supply
NRS 048 series
Electrical Equipment Specifications
Substation equipment
NRS 029, NRS 030, NRS 054
ABC Cable fittings
NRS 051, NRS 018, NRS 020
Overhead lines structures
NRS 038, NRS 073, NRS 022
Service connection boxes
NRS 032, NRS 056
Overhead Switchgear
NRS 031, NRS 035, NRS 036, NRS 046
Insulators
NRS 066
Earth Fault Indicators
NRS 072, NRS 068
Cables
NRS 077, NRS 013, NRS 074-1
Cable fittings & terminations
NRS 053, NRS 012, NRS 028, NRS 074-2, NRS 075
Switchgear for Underground Distribution
NRS 003, NRS 004, NRS 006 NRS 067
NRS website: www.nrs.eskom.co.za
13
Email queries to nrs@eskom.co.za
NRS information
5
Accessing the NRS specifications
NRS specifications are copyright protected. The specifications are available on the NRS
website (http://www.nrs.eskom.co.za).
Eskom employees are able to download the specifications from the Eskom Intranet website
free of charge. (under Resources and Strategy – R&S).
Engineer members of the AMEU may download NRS documents free of charge from the
website for use within their organization. To register and obtain a login and password to allow
you access, please contact Alvin Fredericks on alvin.fredericks@eskom.co.za.
Other users may purchase the specifications from the SABS (Standards Sales –StanSA).
The contact number is (012) 428 6834.
6
Previous NRS award winners
Winners of NRS awards
An NRS award is made annually, to individuals who have contributed exceptionally to NRS
standardization, at the STANSA Standards Day Conferences. The past winners are shown
below.
Year
Recipient
Organization
2005
Greg Whyte
Eskom
2004
Patrick O’Halloran
City Power, Johannesburg
2003
Robert Koch
Eskom
2002
Allen Gower
eThekwini
NRS website: www.nrs.eskom.co.za
14
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NRS information
7
ESLC Strategic Interventions
Supporting the objectives of NERSA
The National Energy Regulator of South Africa (NERSA) observes the activities of the ESLC
and participates in numerous NRS working groups. Several NRS specifications have been
developed at the request of the Regulator. Relevant NRS specifications are referenced by
the NERSA Grid Code or included as licence conditions.
Repository of Industry Standards
Recognizing that common standards are essential for successful EDI restructuring, in 2004,
the ESLC invited EDI Holdings Company to nominate a representative onto the ESLC. In
collaboration with the EDI Holdings Wires Committee, the ESLC undertook a project to collect
organization level standards from municipalities and Eskom. These standards are available
on the ESLC repository of industry standards on the NRS website (www.nrs.eskom.co.za).
Where possible these standards are rationalized into NRS specifications.
StanSA/NRS dual numbering
Traditionally certain NRS specifications were adopted by Standards South Africa (StanSA)
and the NRS specifications were withdrawn. This led to a situation where the NRS Working
Groups that developed the original specification had little influence over the maintenance of
the standard. Secondly Eskom and municipalities had to purchase these standards from
StanSA. Users of the original NRS specification had to also update their documentation to
reflect the new SANS standard as the NRS specification no longer existed.
To overcome these difficulties a Memorandum of Agreement was signed between the ESLC
and StanSA where a dual numbering SANS/NRS system was defined. Under this
memorandum, NRS specifications adopted by StanSA would be dual numbered and both
NRS and STANSA working groups were jointly responsible for the maintenance of the
specification.
Non-compliance with NRS specifications
Several cases of non-compliance with NRS specifications have been brought to the attention
of the ESLC. Although the purchaser specified compliance to an NRS specification, the
supplier did not adhere to the requirements detailed in the specification. This has
considerable implications including a breach of contract/tender requirements. Consequently,
a process, approved by the ESLC, has been developed to address such issues. Eskom and
municipalities are encouraged to notify the ESLC of all known non-compliances so that the
necessary remedial action/s can be taken.
Collaboration with TESCOD
TESCOD is the technology and standardization steering committee of Eskom Distribution. In
most cases TESCOD standards are used as a basis for developing NRS specifications. The
ESLC has identified opportunities for further collaboration with TESCOD which will prevent
duplication of effort and optimise the use of resources. TESCOD invites municipalities to
participate on their study committees. More information on TESCOD is presented on the next
page.
Continuing Professional Development (CPD)
Based on the ECSA’s rules governing the CPD process, individuals will get credit for active
participation in NRS working groups. The ESLC sent out a communiqué to inform NRS
participants of this. The NRS PMA will keep appropriate records of participation.
NRS website: www.nrs.eskom.co.za
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NRS information
8
NRS PMA details
NRS PMA manages the NRS standardization programme on behalf of the ESLC. The
NRS PMA comprises the following staff members:
Name
9
E-mail
Telephone Nos.
Vinod Singh
vinod.singh@eskom.co.za
+27 11 651 6846
Paul Johnson
paul.johnson@eskom.co.za
+27 11 651 6843
Alvin Fredericks
alvin.fredericks@eskom.co.za
+27 11 651 6861
Francisca Mabuza
francisca.mabuza@eskom.co.za
+27 11 651 6720
Vishal Sewchand
vishal.sewchand@eskom.co.za
+27 11 651 6850
Nomakhuwa Mthembu
nomakhuwa.mthembu@eskom.co.za
+27 11 651 6830
Lesego Mosime
lesego.mosime@eskom.co.za
+27 11 651 6832
Information on TESCOD
Information on TESCOD
The Technology Steering Committee of Eskom Distribution (TESCOD) has the following
Study Committees that manage technology and standardization - Performance and QOS,
Network Optimisation, Maintenance Management, Telecommunication, Telecontrol,
Protection, DC Systems, Measurements & Prepayment Metering, Substation, Overhead Dx,
Underground Dx, Land Development, Network Planning, Data Standards.
For more information on participating in TESCOD Study Committees contact:
Andre Bekker
Tel: (011) 871-2416
E-mail: andre.bekker@eskom.co.za
Philip Groenewald
Tel: (011) 871-3484
E-mail: philip.groenewald@eskom.co.za
For more information on subscribing
specifications, guidelines, etc) contact:
Johan Scholtz
Tel: (011) 871-2430
NRS website: www.nrs.eskom.co.za
to
TESCOD
documents
(standards,
E-mail: Johan.scholtz@eskom.co.za
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