Scope Oil

Scope Oil Ltd

In the case of electrical transformers, the technology was proven safe and effective in treating oil in transformers while online and fully energized, thereby saving capacity constrained power companies the opportunity costs associated with shutting down - as well as the often substantial costs of dismantling - their equipment.

Our focus has expanded from a contracting firm to a manufacturer and service provider of oil purification equipment and filtration media to the power industries. Today, we offer a range of services, vacuum degasification/purification systems and filtration media. 

The mission of Scope Oil Ltd is simple; Provide purification results in the treatment of contaminated oil out in the field that are indistinguishable from new, through to the most environmentally friendly means available. 

Laboratory Testing

Process test results
Independent laboratory test results established that the regenerated transformer oil from our process meets and exceeds international standards IEC 422, BS148, ASTM D-831, ASTM D-1533, ASTM D-2945 and AS1767.

Typical results show:
Acidity <0.02 mg KOH/g 
Dielectric strength >60 kv 
Moisture content <10 ppm 
Particle count 13/9 or better 
Interfacial tension >34 mN/m 
Appearance/ colour clear and bright 
Total combustible gases <10 microliters per liter
Microliters per litre Resistivity @ 20 degrees C >10,000 
Dielectric Dissipation Factor 0.0009 @ 90 degrees C

The number of passes required to achieve these results is totally dependent on the condition of the oil prior to treatment.

However, for a moderately contaminated transformer with an acidity content of 0.09mg KOH/g, 2-3 passes would be sufficient. 

For any transformer, a minimum of 2 passes is recommended. The reason for this recommendation is that for a relatively clean unit around 0.06mg KOH/g, the first pass removes the contamination. The second pass fixes the high values for resistivity and interfacial tension, which only improves after decontamination is complete. 

Product Line

TVM T100 
Highly maneuverable, truck mounted transformer oil regeneration equipment, ideally suited for servicing of transformers of 6,000 litres in confined spaces. 

Maximum flow rate: 1,200 litres per hour Dimensions: 7.8 metres L x 2.3 metres W x 3.4 metres H (including cab and chassis) 

TVM 300
Ideally suited for larger transformers, the TVM 3000 is an automatically controlled, high volume degasifier and vacuum powered system, with up to 5 media filtration vessels in series for maximum performance.

Maximum flow rate: 1,600 litres per minute Dimensions: 6 metres L x 2.4 metres W x 3.2 metres H 

Transformer purification media
Two grades of catalytic clay for efficient and cost effective neutralization and purification.

Hydraulic purification media
A highly effective granulation formulation providing superior osmotic flow 

Protecting the Environment

Scope Oil Ltd has made a firm commitment to environmental conservation through recycling. Not only is the technology designed to minimize the environmental impact by returning the contaminated oil to "like new" specifications, it also minimizes the risk to the environment by treating oil in situ. It is so thorough in removing contaminants from the oil that the spent media is approved for non-hazardous landfill disposal in New Zealand. The net result is less hazardous waste in our environment and less demand on our precious resources. 

FAQ's

Q. What safety features does the process plant contain? 
A.The process plant is P.L.C. operated, so all systems go to a fail-safe condition in the event of any component failure. This is to protect the client's asset from any damage at all times while minimizing mishap through human error. 

Q. How is the spent filtration media disposed of? 
A. The spent media is vacuum stripped before being extracted from the media pots, minimising the oil retention of the spent media to approximately 2%. TCLP tests have been carried out and the results submitted to local authorities. The local authority has designated the spent media to be disposed of as ordinary landfill. 

Q. What happens if an oil line ruptures? 
A. The plant is self contained in the event of a system breach.

Q. Duration of process?
A. Average time for combined set-up and shut down "clean up" is 3 ½ hours. Allow for a minimum of 2 complete passes for total literage of oil in the transformer. More passes may be required depending on the condition of the oil.

Q. What does the process do to the oil? 
A. (a) Removes all sludge and particulate material
(b) De-gassifies the oil
(c) Removes free and molecular water
(d) De-acidifies the oil 

Q. What is the benefit to the client?
A. Extends the life of the transformer by: 
(a) Removing sludge from interstices and cooling ducts 
(b) Reducing acidity 
(c) Increasing dielectric breakdown 
(d) Reducing moisture content
(e) Removes gas content
(f)The process is cost effective in that it reduces the cost in transformer maintenance and with the capability of "ONLINE" treatment, removes all outage costs. 

Q. What protection is provided for the transformer? 
A. The process plant incorporates a Buchholz Relay with full computer enhanced protection for the transformer from:
(a) Oil in balance between inlet and outlet oil flows 
(b) Under or over oil pressures 
(c) Gas or air entering the transformer 
(d) Oil temperature imbalance 
(e) Plant power failure
(f) Any power surges 

Q. How many litres per hour for treatment? 
A. Nominally 1400 litres per hour. 

Q. What is the power supply and demand? 
A. One 20amp 3 phase plug. 

For more information please email us oil@scopein.co.nz