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Promoting Electrical Safety in the
Transmission and Distribution of
Electricity in Singapore
Presented by: Er Joseph Michael
Sr Principal Engineer
(Electricity Regulation)
Date : Tuesday 25th Jan 2011
Time : 10.50am - 11.10am
Venue : Kowloon Shangri-La Hotel
Hong Kong
SP PowerAssets Ltd
(SPPA)
• Owner of
Transmission &
Distribution
Network
SP PowerGrid Ltd
(SPPG)
• Operator of the
T&D Network
Energy Market
Authority (EMA)
• Regulator of the
Electricity & Gas
Industries in
Singapore
THREE KEY PLAYERS
Ministry of Trade
and Industry
THREE KEY PLAYERS
SPPA
SPPG
ROLES OF SPPA AND SPPG IN THE ELECTRICITY INDUSTRY
• Develop and maintain a reliable & efficient T&D network
• Facilitate competition in the generation and sale of electricity
• Provide non-discriminatory access to its T&D network
SPPA- SPPG signed Transmission System
Management Services Agreement (08 Oct
2003)
Transmission Agent Licence - EMA/TAL/001
(On 27 Jul 2006)
Transmission Licence - EMA/TE/002
valid for 25 years wef 03 Nov 2003
ASSETS OWNED BY SPPA
Asset Value is S$7.3 Billion
Note : Figures are valid as at 31 Mar 2010
400 kV (4)
230kV (17)
66 kV (94)
22kV & 6.6kV (9964)
Low Voltage 400/230 V
SINGAPORE’S TRANSMISSION SYSTEM
Low Voltage Consumers
SPPG
EMA
PROCCESSES TO ENHANCE ELECTRICAL SAFETY
• Staff Training
• Developing a Culture of Continuous Improvement
• Staff Training
• Maintenance of Equipment
• Contractor Safety Management System
• Developing a Culture of Continuous Improvement
CONTRACTOR SAFETY MANAGEMENT SYSTEM
CONTRACTOR SAFETY MANAGEMENT SYSTEM
SPPG
EMA
REPORTING AND INVESTIGATION OF AN ELECTRICAL
INCIDENT IN THE T&D NETWORK
Investigation by Electricity Regulation Branch :
• Site Visit
• Preliminary Investigation
• Investigation Report
Report to EMA by the quickest means possible:
• Telephone
• Incident Report within 24 hours
Section 94 of the Electricity Act -
Serious Accidents to be reported and investigated
INVESTIGATION OF ELECTRICAL INCIDENTS
IS UNDERTAKEN BY EMA
ELECTRICAL INCIDENTS IN THE T&D NETWORK
CASE STUDY NO. 1- 150 CANTONMENT ROAD
FACTS OF ELECTRICAL INCIDENT
• Date : Mon 15 Oct 2007
• Location : Overground Box (OGB)
• Deceased: A 35-year old male
FINDING
The deceased was electrocuted while attempting
to steal cables.
CASE STUDY NO. 1- 150 CANTONMENT ROAD
The ‘LIVE’ part of the
Blue phase link metal
CASE STUDY NO. 1- 150 CANTONMENT ROAD
CASE STUDY NO. 1- 150 CANTONMENT ROAD
OGB 23087C2060 OGB 23084C6445
OGB 23087C2871F
Building A
Building B
Mobile Generator
Lesson Learnt : Remove decommissioned
equipment from site and reduce the risk of electrical
shock
CASE STUDY NO. 2 – SOMERSET 66KV SUBSTATION
FACTS OF ELECTRICAL INCIDENT
• Date : Wed 02 Jul 2008
• Location : Somerset 66kV substation switchgear bay
• Injured: A 34-year old male who suffered second
degree burns on the right side of the body, right arm
and right leg.
FINDING
The lack of clear instructions from the maintenance
team leader and incorrect marking on site misled a
worker into working on Isolator 6-289 instead of
Isolator 6-189 resulting in a flashover.
CASE STUDY NO. 2 – SOMERSET 66KV SUBSTATION
Damaged Isolator 6-189
Local Control Box for Isolator 6-189
6-189 6-289
CASE STUDY NO. 2 – SOMERSET 66KV SUBSTATION
LESSONS LEARNT
• The Authorised Person from SPPG failed to follow
established practice as specified in SPPG’s document
“Rules for the Control and Safe Operation of High and Low
Voltage Apparatus” – 4th Edition June 2006
• A clear message must be sent to all SPPG Operational
Personnel that safety is of paramount importance and that
deviation from best practices will not be tolerated.
• SPPG was fined S$850K under our Financial Penalty
Scheme for the outage caused.
• Authorised Officer was also penalised.
Joint Bay A
Joint Bay B
Mandai Rd
22/6.6 kV S/S
Mandai Rifle
Range RMU
S/S
Telecoms Mobile
Radio Base Station
RMU S/S To Mandai
Road
To Singapore
Zoological Gdns
S’pore Zoological
Gdn 22/6.6 kV S/S
Damaged Mandai Rd 22/6.6 kV
S/S to Telecoms Mobile Radio
Base Stn RMU S/S New Cable
S’pore Zoological Gdn 6.6 kV S/S to Mandai Rifle
Range RMU S/S
2nd Cut
1st
Cut Joint
CASE STUDY NO. 3- MANDAI LAKE ROAD ROAD
New
Cable
Live
Cable
Faulty
Cable
8cm 8cm 8cm
1.5 metres below ground level
Power Saw
Cross-Section of the 6.6kV Cables
in Joint Bay A
CASE STUDY NO. 3 - MANDAI LAKE ROAD
CASE STUDY NO. 3 - MANDAI LAKE ROAD
CASE STUDY NO. 3 - MANDAI LAKE ROAD
CASE STUDY NO. 3 - MANDAI LAKE ROAD
LESSONS LEARNT
• When carrying out cable repair work, there is a
need for proper supervision by the Authorised
Person over the entire cable cutting process.
• Need to develop and prescribe the types of
support for different types of cables and different
types of cutting tools.
A NEW ELECTRICAL HAZARD
A NEW ELECTRICAL HAZARD
THANK YOU FOR YOUR KIND
ATTENTION