1. Presenter: Peter Busch
Application of R.C.M. type Maintenance Methodology within Eskom Distribution
Presenter: Peter Busch

2. Background Eskom The Company
At 31 March 2005:
Nominal capacity – MW
Power lines (all voltages) – km
Coal burnt – 136,4 Mt
Revenue (Company) – R41 387m
Total sales – GWh
Sales to countries in southern Africa (Transmission and Distribution) – GWh
Peak demand on integrated system – MW
Total assets (Company) – R million
Employees –
Customers –

3. International Comparisons
Sales
Rating
Country
TWh
by sales
Company
RAO-UES
Russia
636 1
EDF
France
473 2
E.On.
Germany
404 3
KEPCO
South Korea
294 4
TEPCO
Japan
281 5
RWE Energie AG
Germany
230 6
Eskom
South Africa
206 7
Vattenfall
Sweden
186 8
Eletrobras
Brazil
178 9
Hydro Quebec
Canada
169 10
Taiwan Power (TaiPower)
Taiwan
159 11
Enel
Italy
156 12
TVA
USA
155 13
Kansai Electric Power Co.
Japan
142 14
Electrabel
Belgium
137 15
Endesa
Spain
134 16
Chubu
Japan
123 17
AEP
USA
118 18
AES
USA
108 19
FPL
USA
103 20

4. International Comparisons
Generation capacity MW
Rating by capacity
Company
Country
RAO-UES
Russia 1
EDF
France 2
Tepco Electric Power Co
Japan
62 660 3
E.On
Germany
54 000 4
KEPCO
Korea
50 432 5
Enel
Italy
47 000 6
AES
USA
46 000 7
RWE Energie AG
45 000 8
Endea
Spain
43 000 9
Eletrobas
Brazil
40 854 10
Eskom
South Africa
39 810 11
Southern
39 000 12
Duke
38 748 13
Exelon
38 000 14
AEP
36 000 15
Kansai Electric
35 434 16
Hydro Quebec
Canada
34 000 17
Taiwan Power (TaiPower)
Taiwan
33 290 18
TVA
33 189 19
Vattenfall
Sweden
33 000 20
Source: Data Monitor UK 2004 figures

5. Background Eskom The Company
Eskom is Africa’s largest Electricity Utility generating 60% of Africa’s electricity. It has 5 divisions, which are the following: Generation, Transmission, Distribution, Eskom Enterprises and Corporate.
Eskom Distribution is divided into 6 Regions covering all of geographic South Africa. Each Region is divided into a number of geographic areas where area staff makes use of a computerised maintenance management system to implement maintenance strategies. Within Eskom there is a lot of staff movement at this level and therefore a skill shortage as well as experience is in short supply.

6. Background Eskom The Company
Within Eskom Distribution there are approximately 4000 High Voltage Substations from 132kV to 33 kV spread around South Africa. The Substations contain approximately 4500 Power Transformers with 99 different makes and types of Tap Switches Circuit Breakers of 400 different makes and types M.V and H.V. lines. Eight different voltage categories are used from 132kV down to 3,3kV.

7. The Maintenance Hierarchy within Eskom Distribution
National Maintenance Policy for electricity networks NRS 082. NRS 082 (1.1) doc used by the N.E.R.
Eskom maintenance policy. maintenance policy.pdf
Eskom Maintenance planning directive.
Eskom Distribution Standards per equipment type. Standard for maintenance of circuit breakers.pdf
Eskom Job Plans per maintenance intervention per Make and Type of equipment.
Eskom Work Instructions per maintenance intervention per Make and Type of equipment.

8. Maintainable Equipment
Equipment complexity.
Equipment completely automated,
Under fault conditions equipment has to be removed from the fault within less than 100 milliseconds normally within 35 milliseconds.
Equipment loadings and switching control centralized.
Decentralization of equipment around the country.
H.V. Substations approximately 4000
Power Transformers 1MVA and above approximately 4500
There are 99 different makes and types of tap changers.
H.V. Circuit Breakers approximately
There are 400 different makes and types of H.V. circuit breakers which employ 4 different rupturing mediums and 5 different energy sources drive the mechanisms.
M.V. and H.V. Lines approximately 10500
Etc.

9. Issues around skilled staff in the Industry
Skill shortage experienced.
New labour entrants need experience.
Skilled staff centralized within regional offices as well as national offices.
Complex equipment de-centralized.
Technical Service Groups centralized regionally as well as nationally.

10. What strategy to follow
A pure RCM pilot study was done at Brackpan North, a Substation to the East of Johannesburg.
Costing of various solution.
Decision on maintenance strategy solution.
A modified “RCM” type study to be implemented.

11. Equipment and work group format
Equipment divided into groups of expertise ie. Transformers, Circuit Breakers, Cables, D.C. Batteries, Low Voltage etc.
Centralized modified “R.C.M.” studies done.
Regional representation on Work group.
National specialists on Work group.

12. Requirements for easy to use Software
The software package should be user friendly.
R.C.M. knowledge by the user not required.
Experience not required by user.
Applicable to all Geographic areas.
Applicable to all network requirements.
Applicable to all customer loads.

13. Software Package Market was investigated for suitable software.
All maintenance planners have Microsoft office suite.
Written in Microsoft Access.
Results of work group studies populate tables.
Queries run on tables returning maintenance strategies depending on the options of the maintenance planner.

14. Transformer study Transformer FMEA studies.
PowerTrfr RCM Template(Prelim Findings).xls
Transformer RCM decision diagram.
Decision work sheet.xls
Criticality scores.
Criticality Analyses Questionaire.xls
Dissolved Gas analysis.
DGA cost analysis for Transformers.xls
Software
DDMMT SOFTWARE.mdb
Software Demonstration and Training Tool
DT Maintenance management tool_30_01_2007.EXE

15. Questions
Any Questions?