TRANSFORMERS & SWITCHGEAR2023-05-24T09:43:20+00:00

Electrical assets & oil

Many electrical assets contain mineral oil and other fluids for the purpose of insulation and temperature regulation.  Electrical transformers are a major source of used mineral oil, so it follows that Benzoil has proven capabilities working with transformer asset owners like electric utilities and energy intensive industries.

Our services are not limited to transformer oil disposal; removal from site of whole assets for the purpose of repairs or end-of-life scrapping are also in our scope.  In particular removals from remote sites, difficult to access sites and secure sites are where we can provide optimal outcomes.

Owners of oil-filled electrical equipment ultimately bear the responsibility for safe handling and disposal, and must consider the cradle to grave view.  As Benzoil ensures full compliance with legislative requirements, industry comes to us for sampling, removal, disposal and recycling of obsolete transformers and equipment.

The types of transformers and oil filled equipment Benzoil handles includes:

  • Power transformers (from pole tops to generator transformers)
  • Current transformers (CTs)
  • Voltage transformers (VTs)
  • Capacitor voltage transformers (CVTs)
  • Circuit breakers (CBs)
  • Switchgear
  • Capacitors
  • High voltage bushings
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Used transformer oil management

Benzoil sources, drains, transports, recovers, purchases and disposes of used transformer oil. We are experts at used transformer oil disposal and removal. At various times during the lifecycle of electrical equipment, the oil may need to be drained such as:

  • End-of-life (prior to scrapping)
  • Mid-life refurbishment (to allow maintenance on the internals)
  • Critical events (failures, explosions, major leaks)
  • Civil works (switchyard upgrades or demolitions)

Benzoil partners with infrastructure maintenance and power industry service organisations to provide transformer oil removal and disposal solution, and used oil management services tailored to transformers and high voltage equipment.


Insulating fluids

Depending on the age, design, intended use and location, transformers and high voltage equipment can be filled with a range of different insulating fluids.  While mineral oils are still used extensively, the use of non-mineral esters as insulating and heat transfer liquids is on the rise.  Like mineral oil, their handling and disposal requires special attention.  We handle the following fluids:

  • Mineral oil (e.g. Superfine, Diala, Nytro Libra)
  • Natural esters (e.g. FR3, BIOTEMP, NeuGen)
  • Synthetic esters (e.g. Envirotemp 200, MIDEL 7131)
  • Silicone fluids (e.g. Dow Corning 561)
  • Aromatic oils (e.g. Jarylec, Dow C4, PXE and Faradol)
  • Polychlorinated biphenyls (e.g. Aroclor, Askarel, Chlophen, No-Flamol, Phenoclor)

Other waste streams from transformers

Transformers contain significant percentages of copper and steel.  Recovery of this valuable scrap metal is a specialised service we offer.  We can provide transformer scrapping solutions for any size of transformer at any location across Australia.

In addition to oil filled equipment, Benzoil has capabilities dealing with other related waste material which include:

  • Disposal of coal tar pitch composite (found in electrical control cabinets and switchboard panels)
  • Handling of sulfur hexafluoride (SF6) gas filled circuit breakers
  • Recycling of porcelain from electrical bushings
  • Salvage and disposal of scrap metal (copper, aluminium, steel)

Sulfur hexafluoride (SF6) is widely used as an insulator and breaker medium within switches, circuit-breakers, and other electrical transmission and distribution equipment, but being a super potent greenhouse gas, it is regulated at state and federal levels.  During its use in equipment SF6 helps improve safety and reliability, however when time comes for maintenance or disposal, strict adherence to disposal regulations is suggested – time then to talk to Benzoil.