2006 Muttrah Incident Report - authority for electricity regulation, oman

TABLE OF CONTENTS
GLOSSARY OF TERMS ..................................................................................................3
1 INTRODUCTION AND SUMMARY OF FINDINGS ..................................................5
1.1 Summary of Findings ..................................................................................................... 5
1.2 Recommendations ......................................................................................................... 6
2 SCOPE OF INVESTIGATION AND METHODOLOGY ............................................7
2.1 Summary of the Incident ................................................................................................ 7
2.2 Scope of investigation .................................................................................................... 7
2.3 Methodology................................................................................................................... 9
3 BACKGROUND – RETROFITTING OF SWITCHGEAR........................................10
4 RETROFITTING AT MUTTRAH OLD STORES PRIMARY SUBSTATION...........12
4.1 Substation Design and Layout ..................................................................................... 12
4.2 The Contract for Retrofitting at Muttrah ....................................................................... 14
5 SEQUENCE OF EVENTS.......................................................................................17
6 TECHNICAL INVESTIGATION...............................................................................20
6.1 The KEMA Report ........................................................................................................ 20
6.2 The ABB Italy Report ................................................................................................... 25
6.3 Cause of the Incident ................................................................................................... 27
6.4 Technical Conclusions ................................................................................................. 28
7 THE CONTRACT....................................................................................................30
7.1 Placing of the Contract................................................................................................. 30
7.2 The Contract – Conclusions......................................................................................... 31
8 SITE SAFETY .........................................................................................................32
8.1 Use of Limitation of Access.......................................................................................... 32
8.2 Conclusions – Site Safety ............................................................................................ 32
9 FIRST AID...............................................................................................................34
10 RECOMMENDATIONS.......................................................................................35
10.1 Retrofitting .................................................................................................................... 35
10.2 Contracts ...................................................................................................................... 35
10.3 Site Safety .................................................................................................................... 35
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