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Power Quality

Singapore has one of the most reliable supply of electricity.

According to the latest international benchmarking report by DNV GL in 2018, Singapore’s electricity grid is ranked top among major cities. We have an average interruption time of less than 1 minute per customer a year.


SAIDI 2017

Like all electricity supply systems, there is the occasional voltage dip, which is a momentary reduction in electricity supply voltage and not a power failure.

Voltage dips are generally caused by failure of high voltage equipment. Through proper maintenance of such equipment, we strive to keep the frequency of voltage dips in the electricity system to the minimum.

The table below gives information on voltage dip incidents in Singapore.

For the latest update on voltage dip incidents, consumers can call the SP PowerGrid Ltd’s 24-hour Electricity Service Centre at tel: 1800 778 8888 or regulatory action taken against Licensed Workers.


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Date Owner / Location Of Equipment / Cable Type Of Equipment / Cable Name of Manufacturer Licensed Electrical Engineer In-Charge (if applicable)
30 Oct 2020 SP PowerAssets Ltd, North Link No 3 Transformer Station 22kV/LV Transformer Alstom N.A.
06 Oct 2020 SMRT Trains Ltd Stamford Station Singapore 510000 22kV Air Insulated Switchgear Meiden Ho Fook Seng
18 Sep 2020 JTC Corporation 1 Banyan View Singapore 627521 Schneider MV Motorpact Panel Schneider Electric Chin Hin Pok
13 Sep 2020 Keppel Merlimau Cogen, KMC CCP2 Generator Step Up Transformer Surge Arrestor Crompton Greaves N.A.
12 Sep 2020 Digital Singapore 1 Pte Ltd 3 Loyang Way Singapore 508719 22kV GIS Switchboard Schneider Electric Wong Kok Liang
05 Sep 2020 Singapore Prison Service 978 Upper Changi Road North Singapore 506977 22kV Gas Insulated Switchgear Areva Lee Wee Hing
16 Aug 2020 SP PowerAssets Ltd, 6.6kV circuit between Jln Pemimpin 22/6.6kV substation and Robert Bosch 6.6kV substation 6.6kV XLPE Cable Dainichi-Nippon N.A.
13 Aug 2020 SP PowerAssets Ltd, 6.6kV Switchgear at AMK St 22 Blk 215 22/6.6kV substation 6.6kV Switchgear ABB N.A.
06 Jul 2020 Hotel Properties Limited 581 Orchard Road Singapore 238883 22kV/LV Transformer ABB Yeo Chin Yin
07 Jun 2020 SP PowerAssets Ltd, 22kV circuit between Anchorvale Rd Blk 352 22kV substation and Anchorvale Link Blk 318 22kV substation 22kV Cable Joint 3M N.A.
05 Jun 2020 SP PowerAssets Ltd, 22kV circuit between Bukit Batok St 34 Blk 345 substation and Bukit Batok Town Centre Blk 644A substation 22kV XLPE Cable Gold Star N.A.
04 Jun 2020 Cogent Land Capital Pte Ltd 720 Dunearn Road Singapore 289631 22kV Switchgear Yorkshire YSF6 Chong Ah Chye
19 Apr 2020 Disturbance at Tenaga Nasional Berhad N.A. N.A. N.A.
15 Apr 2020 SP PowerAssets Ltd, 22kV interconnector feeder at MacAlister Rd 66kV substation 22kV Cable Joint 3M N.A.
12 Apr 2020 SP PowerAssets Ltd, 6.6kV circuit between Marine Parade 66kV substation and Parkway View 6.6kV substation 6.6kV XLPE Cable Hitachi N.A.
08 Apr 2020 PSA Corporation Limited Brani Terminal Pulau Brani Singapore 090000 6.6kV XLPE Cable Fujikura Cable Cheah Wi Kwong
22 Mar 2020 Royal Group Development Pte Ltd 2 Bukit Manis Road Singapore 099891 22kV Voltage Transformer Balteau Wan Siew Kay Tom
20 Mar 2020 The Management Corporation - Strata Title Plan No. 1164 138 Cecil Street Cecil Court Singapore 069538 22kV Voltage Transformer Yorkshire Yeo Chin Yin
16 Mar 2020 SBS Transit DTL Pte Ltd 350 Woodlands Road Downtown Line Singapore 677730 22kV Rectifier Transformer Siemens Tan Kee Choon
07 Mar 2020 Tuas Power Generation Pte Ltd, 400kV Switch House 400kV GIS Circuit Breaker Toshiba N.A.
05 Mar 2020 SP PowerAssets Ltd, 22kV circuit between Jurong West 66/22kV substation and Jurong West St 71 Blk 712B 22kV substation 22kV Cable Joint 3M N.A.
24 Feb 2020 SP PowerAssets Ltd, 6.6kV circuit between Yishun Ring Rd Blk 114 22/6.6kV substation and Yishun West Area Office Blk 701A substation 6.6kV XLPE Cable Taihan Electric Wire N.A.
22 Feb 2020 SP PowerAssets Ltd, 22kV circuit between Pulau Seraya 66/22kV substation and Chemical Specialties 22kV substation 22kV Cable Joint 3M N.A.
13 Feb 2020 SP PowerAssets Ltd, 6.6kV cable between AMK St 22 Blk 215 22/6.6kV substation switchgear and its 6.6kV/LV transformer 6.6kV XLPE Cable Gold Star N.A.
11 Feb 2020 Changi Airport Group (Singapore) Pte Ltd 80 Airport Boulevard Changi Airport Singapore 819642 22kV Cable Termination Raychem Leng Meng Kae
15 Jan 2020 SP PowerAssets Ltd, 6.6kV circuit between Jln Lembah Kallang substation and Whampoa South Blk 49A substation 6.6kV XLPE Cable Taihan Electric Wire N.A.
11 Jan 2020 SP PowerAssets Ltd, 230kV circuit between Marina South and Labrador I 230kV substations 230kV XLPE Cable Taihan Electric Wire Co., Ltd (Cable damage by third party) N.A.
15 Dec 2019 SP PowerAssets Ltd, 22kV circuit between Senoko Rd substation and 7 Senoko Cres substation 22kV Cable Joint 3M N.A.
14 Dec 2019 SP PowerAssets Ltd, 22kV circuit between Aida St substation and Chai Chee Ave Blk 33 substation 22kV Cable Joint 3M N.A.
03 Dec 2019 SP PowerAssets Ltd, 6.6kV circuit between Paya Lebar 66kV substation & Eunos W'hse substation 6.6kV XLPE Cable Yazaki N.A.
25 Nov 2019 SP PowerAssets Ltd, 6.6kV circuit between Jln Eunos HDB Blk 12 substation and Eunos Ave 8 Blk 1001 substation 6.6kV XLPE Cable LG N.A.
22 Oct 2019 Resorts Concept Pte Ltd 1 Pasir Ris Close Singapore 519599 22kV Gas Insulated Switchgear Schneider Electric Ho See Fong
04 Oct 2019 SP PowerAssets Ltd, 6.6kV circuit between Bukit Batok West Ave 6 Blk 114 substation and Bukit Batok West Ave 6 Blk 144 substation 6.6kV XLPE Cable Pacific Electric Wire & Cable N.A.
17 Sep 2019 SP PowerAssets Ltd, 22kV circuit between Bedok North St 5 Blk 3017 No 2 substation and Bedok North Rd Blk 80 No 1 substation 22kV Cable Joint 3M N.A.
09 Sep 2019 SP PowerAssets Ltd, 6.6kV circuit between Bukit Batok West Ave 6 Blk 114 substation and Bukit Batok West Ave 6 Blk 144 substation 6.6kV XLPE Cable Joint Seram N.A.
29 Aug 2019 Alcon Singapore Manufacturing Pte Ltd 19 Tuas South Avenue 14 Singapore 637313 22kV/LV Transformer Schneider Electric Lok Choon Cheow
30 Jul 2019 SP PowerAssets Ltd, 22kV circuit between Chander 66kV substation and SLF Complex substation 22kV XLPE Cable Furukawa N.A.
23 Jul 2019 SBS Transit DTL Pte Ltd 4 Changi Business Park Crescent Singapore 486008 22kV/LV Transformer Siemens Philip Su Mun Poh
21 Jul 2019 SP PowerAssets Ltd, 6.6kV circuit between Pasir Ris St 52 Blk 500A 22/6.6kV substation and Pasir Ris St 52 Blk 521A 6.6kV substation 6.6kV XLPE Cable Taihan Electric Wire N.A.
16 Jul 2019 SP PowerAssets Ltd, 22kV circuit between Tampines N/T 66kV substation and Tampines St 11 Blk 105 substation 22kV XLPE Cable Gold Star N.A.
03 Jul 2019 Safekeep Pte Ltd 158 Kallang Way Singapore 349245 22kV Cable Termination Standalform Chang Hwai Cheh
27 Jun 2019 PSA Corporation Limited PSA 66/22kV Substation West Coast Highway PSA New Container Port Singapore 110000 6.6kV EPR Cable Cavotec - Palazzo - Panzerflex - L Cheah Wi Kwong
27 May 2019 SP PowerAssets Ltd, Toa Payoh 66kV substation 66/22kV 75MVA transformer Starkstrom - Geratebau N.A.
07 May 2019 Singapore University of Technology and Design 8, 51, 53, 55, 57, 59 & 61 Somapah Road & Changi South Avenue 1 Singapore 487372 GMA 24-25-06 22kV Gas Insulated Switchgear (GIS) Schneider Electric Tan Chek Yuan
15 Mar 2019 SP PowerAssets Ltd, 6.6kV circuit between Bukit Batok East Ave 4 Blk 268 22/6.6kV substation and Keming Pri Sch substation 6.6kV Cable Joint Seram N.A.
05 Mar 2019 SP PowerAssets Ltd, Tanglin Road Singapore Post substation 22kV Switchgear ABB N.A.
22 Feb 2019 Sembcorp Industries Ltd 19 Tembusu Road Singapore 627597 Transformer 22/6.6kV Schneider Electric (Indonesia) Wong Soon Chyang Dennis
14 Feb 2019 SP PowerAssets Ltd, Carlton Hotel substation 22kV switchgear Yorkshire N.A.
26 Jan 2019 SP PowerAssets Ltd, Bright Hill 66kV substation 22kV Switchgear Voltage Transformer Hitachi N.A.
21 Dec 2018 SP PowerAssets Ltd, 6.6kV circuit between The Waterside 22/6.6kV substation and Arthur 118 substation 6.6kV XLPE Cable Pacific Electric Wire & Cable N.A.
17 Dec 2018 SP PowerAssets Ltd, 22kV circuit between NUS 66kV substation and NUH Ambulatory Medical Centre substation 22kV Cable Joint 3M N.A.

To view Regulatory Action against Licensed Workers, please click here.

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