(+44) 1306 743355

Transec Online transformer moisture management system TRANSEC UTILISES ADVANCED MOLECULAR SIEVE TECHNOLOGY TO CONTINUOUSLY REMOVE WATER FROM OIL, AND MORE SIGNIFICANTLY FROM THE WINDING INSULATION, TO ACHIEVE, AND THEN MAINTAIN A LOW MOISTURE CONTENT WITHIN A TRANSFORMER. THIS PROLONGS THE SERVICE LIFE BY REDUCING AGEING AND REDUCES THE RISK OF FAILURE DURING THROUGH FAULT CONDITIONS Click here to download specification sheet in pdf format   Features Economic and Low maintenance system that is easily installed and commissioned to a live transformer. Uses oil as the transfer medium to extract water from the paper insulation, where 95% of water is retained. Weigh-in, weigh-out following regeneration ensures control of exact amount of water removed during absorption cycle. Integral in-line oil filter will trap particulate matter and improve the dielectric strength of the oil. CL3 Model for oil volumes above 10,000 litres. CL1 Model for oil volumes below 10,000 litres. Midel 7131 can be accommodated although 3 phase pump is required. Benefits Reduces the effects of ageing on Transformers Increases reliability and service life of transformers by continuously removing moisture and fibres. Enables transformers to be run on higher load cycles with greatly reduced risk of failure. Increases plant utilisation and will allow capital expenditure to be deferred. Transformer Ageing and Service Performance It is widely accepted that moisture in transformers is a major contributory factor to ageing, and may explain many failures that have been classified as 'cause unknown'. Much analytical work has been carried out to confirm that the transfer effect of water, at the paper to oil interface, is a major cause of breakdown of the molecular structure of the paper insulation. This is also directly related to temperature, and temperature cycling. Keeping a transformer in a dry condition, with fibrous matter removed, will also reduce the risk of failure if it is subjected to an exception event, such as through-fault or over-voltage conditions. The TRANSEC System TRANSEC utilises advanced molecular sieve technology to continuously remove moisture from the oil and paper insulation of power transformers, whilst they are on line. TRANSECis piped between the top and bottom take off valves, and the oil pumped through three cylinders in series, containing the molecular sieve The ceramic silo beads are unique in structure, being hydo-scopic, will readily adsorb water to the exclusion of anything else. The system does not affect dissolved gases. As oil flows from the tank, over the sieve, water is gradually extracted, but in turn is replaced by the water from the winding insulation to maintain an equilibrium. Because the process is continuous, the water in the windings is gradually reduced, along with the associated risk of breakdown of the paper insulation at the critical paper/oil interface. A CL3 TRANSEC will remove up to 15 litres of water before saturation occurs, the time to achieve this is dependant on many factors, temperature and temperature change being the main, but typically it is between 9 and 24 months. So long as a top of tank temperature reading is taken at the same time as oil samples, using the industry standard Phiper Chart, the percentage saturation of the winding insulation can be extrapolated, and the total water content of the transformer calculated. Additional Options now include continuous remote monitoring of Temperature and moisture using Vaisala HMP228 probe fitted to TRANSEC, with the further option of logging, or radio carrier, using WiSNet wireless sensor technology to interface at Substation with P.C. for Ethernet, USB or RS 232 or SCADA options. Flow Control monitors are also available with digital output to give an alarm if the pump or supply fails and the flow is lost over the molecular bed. Bowden Installation Services (BIS) BIS have considerable experience in installing and commissioning TRANSEC units on 1 5MVA to 600MVA transformers. Although a simple task, care needs to be taken in forming the Stainless Steel pipe-work, and ensuring a totally oil-tight installation. Commissioning requires careful bleeding of the pipe-work to ensure no air-locks, and a steady oil flow is achieved. BIS offer a total maintenance service, including taking and analysing oil samples for moisture, dissolved gases, acidity, dielectric strength, fibre content, and furfuraldehyde. From readings taken, we will calculate total water content, and recommend a maintenance routine to manage the reduction of water content to an acceptable level. REGENERATION When the input ppm level and output ppm level to TRANSEC equalises, then the cylinders are saturated, and must be changed. We offer a replacement service to supply new for old cylinders, so that downtime is not incurred. We also offer a report on the returned cylinders giving the amount of water contained within the cylinder at saturation.

Ian Bowden or Trevor Newman 
Telephone:	(+44) 1306 743355
FAX:	(+44) 1306 876768

Bowden Bros Ltd
Brickworks House, 
Spook Hill, 
North Holmwood,
Dorking, Surrey RH5 4HR
United Kingdom

General Information: info@bowden-bros.com
Sales: sales@bowden-bros.com
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