transec

OVERVIEW

Power and distribution transformers are some of the most important and expensive assets in a power network. Compared to other equipment, they are very reliable and require very little maintenance since they have no continuously moving parts. However, the insulating materials, being organic, degrade with time in service, and ultimately determine the end of life of the transformer.

In a poorly maintained free breathing transformer water can enter through the natural expansion and contraction of oil as the temperature cycles, but also water is a by-product of the breakdown of the long chain hydro-carbon glucose molecule, as a result of thermal and electrical stress. This leads to degradation of the organic insulation materials as the transformer ages.

OPERATIONAL PRINCIPLE

TRANSEC is an online molecular sieve, developed and manufactured in the U.K. that is designed to continuously remove water from the insulating oil of a power transformer.

After the unit is installed and switched on, the pump continuously cycles the transformer oil through the cylinders. Within the cylinders, water absorbing material removes the moisture from the oil.

As the ppm level in the oil is reduced, water from the solid insulation (where over 95% of the water will accumulate) will migrate from the insulation into the oil to redress the natural equilibrium. This process not only reduces ageing, but will improve the dielectric strength of the insulation, and increase reliability.

After this process, the oil goes through a particle filter to ensure its cleanliness before it returns back to the Transformer.

An inbuilt deaerator insures, that no air will enter the tank. Every TRANSEC unit includes sample / measuring points at the inlet and outlet (to check the moisture content in the oil). An additional prefilter and a monitoring system can be added to the unit as an option.

transec
transec

OPERATIONAL PRINCIPLE

TRANSEC is an online molecular sieve, developed and manufactured in the U.K. that is designed to continuously remove water from the insulating oil of a power transformer.

After the unit is installed and switched on, the pump continuously cycles the transformer oil through the cylinders. Within the cylinders, water absorbing material removes the moisture from the oil.

As the ppm level in the oil is reduced, water from the solid insulation (where over 95% of the water will accumulate) will migrate from the insulation into the oil to redress the natural equilibrium. This process not only reduces ageing, but will improve the dielectric strength of the insulation, and increase reliability.

After this process, the oil goes through a particle filter to ensure its cleanliness before it returns back to the Transformer.

An inbuilt deaerator insures, that no air will enter the tank. Every TRANSEC unit includes sample / measuring points at the inlet and outlet (to check the moisture content in the oil). An additional prefilter and a monitoring system can be added to the unit as an option.

transec

SPECIFICATIONS

TRANSEC CHART

MODELS

CL3A

• high capacity for moisture extraction (12 lt)
• for transformer >10 MVA
• long operation duration without maintenance
• in frame or in cabinet
• measuring and monitoring module available

transec

CL1A

• low weight, easy to move
• for transformer <10 MVA
• cost effective and flexible to operate on different transformer
• measuring and monitoring module available

transec

AVAILABLE ACCESSORIES

MONITORING UNIT

  • Analog output 0-20 mA or 4-20 mA for SCADA
  • Measures water PPM and T° levels of inflow and outflow
  • LCD display
  • Possibility of IEC61850 SCADA integration via Ethernet or fiber optic
transec

PREFILTER

An additional pre filter can be installed in case of a heavy-sludge transformer to extract solid impurities from the transformer oil before entering to the cylinder sieves.

transec φίλτρο

CYLINDER SATURATION

What to do when the moisture extraction cylinders are saturated?

TRANSEC units can typically extract between 3 to 4 liters of water per cylinder before saturation. The rate of extraction is directly linked to the amount of water available in the transformer. The higher moisture content and the warmer the oil is, the faster the extraction will be. You can find typical saturation time below.
The cylinder saturation can be determined either by the TRANSEC monitoring system or by comparing water PPM in 2 oil samples (inlet & outlet).
A set of saturated cylinders can be removed and replaced while the transformer is online by new cylinders within 30 min.

TRANSEC SOLUTION

• Increases LIFE EXPECTANCY of Transformers
• Easy Transformer maintenance WITHOUT OUTAGE – NO SHUTDOWN, no transport
• Cost effective SOLUTION
• Drying Transformer CONTINUOUSLY during operation, 24/7
• Moisture PPM MONITORING available
STAND-ALONE UNIT, only low voltage power supply requested

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