11kV Transformers | Bushing Oil Leak on High Voltage Distribution Transformers
Published 17 Mar 2021
Low (LV) to Extra High Voltage (EHV) Power Services to Distribution Networks
Guest Post by Simon Brown
Business Development Manager/33kV Senior Authorised Person at Ipsum Utilities (Private Networks) at Ipsum. Specialising in the installation, maintenance, testing, commissioning and switching of High Voltage networks up to and including 33kV.
If you require any of these services please contact Simon on 07889706194 or [email protected] to discuss your needs.
Transformer Oil Leak
Video | This is an 11kV bushing oil leak on a 500kVA distribution transformer.
Most likely caused by the end gaskets of the bushings having been penetrated and then the rubber flexible boot has held the oil until I released it as seen in the video. We will be isolating the 11kV transformer to drop the oil level below the bushing, remove it and replace its gaskets before putting it all back together – the cork gaskets on either end of the bushing have been penetrated by the transformer oil and it has travelled from the main tank to the 11kV cable box through the bushing. The rubber flexible bushing boot insulating the 11kV cable connection integral to the heat shrink cable termination was holding it back until I released the pressure.
This video demonstrates the critical value of cyclical inspection and maintenance of substation equipment as required by law associated with the installation and on-going maintenance of high and low voltage equipment.
About Ipsum
At Ipsum, we provide specialist infrastructure services across the UK’s regulated water and energy companies and private sector businesses. We work with our customers to maintain, optimise and develop their above and below ground assets to ensure security and resilience, and with our smart systems and ways of working, we ensure we deliver on time, on budget and safely. At Ipsum, we develop long-term working relationships with our customers by providing essential utility services on both public and private networks.
We have many long-term contracts and framework arrangements in place which are built upon great customer service, safe working practices and the ability to flex and deploy specialist skill sets at short notice. The growth of Ipsum has been built upon our people and our ability to meet the demanding and ever-changing needs of our customers.
The UK utility sector is evolving and expanding to meet increasing customer demand, regulatory driven outcomes and to exploit new innovative technologies, at Ipsum we will continue to grow in this sector by being a reliable, flexible and agile service partner that helps customers meet these new challenges.
As we know, utility service provision is not a 9 to 5 business, our customers don’t switch off their networks or assets at night, or at the weekends, or on holidays, or when things are quiet. They need them to work round the clock – and we at Ipsum are right beside them 24/7 to make sure they do. We pride ourselves in providing specialist scheduled maintenance services, being able to respond to an individual call-out or mobilise onto a major upgrade project and that our customers can rely on Ipsum 24/7/365.
Stockists | 11kV 33kV 66kV Joints Terminations Connectors – 3M Pfisterer Nexans
THORNE & DERRICK
Thorne & Derrick are national distributors of LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment – servicing businesses involved in cabling, jointing, substation, earthing, overhead line and electrical construction at LV, 11kV, 33kV, 66kV and EHV. Supplying a complete range of power cable accessories to support the installation and maintenance of low/medium and high voltage power systems:
- Slip-on Cable Terminations
- Cold-shrink Cable Terminations
- Heat-shrink Cable Terminations
- Cable Joints – Heat & Cold-shrink
- Separable Connectors (Euromold)
- Surge Arresters & Switchgear/Transformer Bushings
Key Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HVÂ
