Retrofit Kits for Vokes Stream-Line Transformer Oil Filtration Plants
For Vokes Stream-Line plant owners TFS offer complete servicing and refurbishment of your existing plants to bring them back to as new operating standards. We also have retrofit kits available to add additional features and functions to your existing Vokes Stream-Line units. These are designed and manufactured by our UK factory trained technical and engineering staff.
Inhibitor Dosing Systems
A self-contained dosing unit typically used in conjunction with an insulating oil treatment plant for the measured dosing of oxidation inhibitor into filtered and dehydrated oil prior to return to the transformer being treated.
The unit incorporates an additive tank fitted with a mechanical mixer to accommodate additives in solid form where a liquid concentrate must be mixed for dosing and provides measured dosing with two possible modes of operation, either a user adjustable fixed rate dosing can be selected by the user so that the rate remains constant regardless of the oil discharge rate from the oil treatment plant, or a user adjustable fixed concentration dosing setting can be selected where the dosing rate automatically varies in response to changes in the discharge rate from the oil treatment plant thereby maintaining the, user adjustable, concentration regardless of the oil discharge rate.
Large capacity high efficiency oil trap
Situated between the vacuum pumps and vacuum chamber to minimise the carryover of insulating oil, protecting the vacuum pumps from oil flooding and minimising maintenance
- Fitted with sight glasses to monitor level of collected oil
- Manually operated drain valve
Staged heater loading – Now available as a retrofit kit
The majority of the electrical load from a Vokes Stream-Line insulating oil treatment plant comes from the electrical heater which uses thermostatic control to maintain the oil at a preset temperature. The thermostat switches all the heater elements simultaneously in response to demand.
We have received feedback from users that this high instantaneous electrical loading can result in problems when plants are run from diesel generator sets, with reports of the generator’s overload protection tripping dropping supply to the plant. Users have also reported the high instantaneous loading causing noticeable and frequent stress to the generator in response to demand from the thermostat.
This issue is more evident when the capacity of the generator set is close to the overall electrical requirement of the plant, and/or with older generators, or when using generators with sensitive or incorrectly set overload protection.
In response to customer feedback, all new insulating oil treatment plants will be fitted with staged heater loading so that in response to demand for heat, the heater load is switched in two or three equal stages (depending on plant model and heater size), with a timed delay between each stage, to allow recovery of the generator set between each stage of the loading. This staged loading avoids spurious tripping of generator sets, with loss of plant operation, and is also ‘kinder’ to generators and engines, resulting in less wear and tear.
This improvement of staged heater loading is now available as a retrofit kit, supplied with instructions, for easy installation by a competent electrician. Alternatively the modification can be carried out in our own workshop.
High quality heavy duty canopy
Provides physical and environmental protection
- Multiple doors for ease of operation and maintenance
- All doors fitted with key locks
- Lift up doors fitted with gas struts
Custom designed and built road going trailer for mobile operation
- Designed specifically for our plants to provide easy access for operation and maintenance as required
- Compliant with Australian road regulations
Integrated auxiliary vacuum pump for transformer evacuation
- Additional vacuum pump dedicated only for transformer evacuation (not required for the dehydration process)
- Various options available with capacities up to 1,000m3/h (integrated)
Self-contained standalone vacuum units are also available (500, to 2,500m3/h) if there is not enough room for an integrated vacuum pump – Contact us for details
Photo Left; 6000 litre per hour Cartridge filtration palnt with the additional 1000m3/h capacity integrated vacuum pump fitted
Digital moisture meter
Displays moisture content in PPM and is hard wired and plumbed for real time readings.
Digital flow meter
Displays flow rate (litres/hour) and accumulated flow (litres, user resettable) and is hard wired and plumbed for real time readings.
Hoses
- Wire reinforced composite oil hoses available in different lengths.
- We can replace your existing plants copper pipes with our new Hydraulic hoses
Anti-vibration mounts
Available for either fixed or mobile installations
Fullers Earth Deacidification Plants
Our Deacidification units use Fullers Earth and have been developed to be utilised in conjunction with our Insulating Oil Treatment Plants to enable operators to regenerate their own oil.
Left – Fullers earth modules for removing acid
Contact us about our range of fullers Earth units.
VOKES is a registered trade mark of a company not associated or affiliated with Transformer Filtration Systems Pty Ltd (TFS) and TFS does not have the sponsorship or approval of the owner of the VOKES trade mark. The word VOKES is used on this website only to indicate that TFS is experienced in the sales, service and support of VOKES machinery and provides genuine VOKES spare parts and products.
Genuine spare parts available ex stock Qld