Trojan TDOS

Overview

The TDOS is unique amongst energised transformer dry out systems: an adsorbent system with long-life water removal filters that only require replacement every two years, along with the additional ability to remove dissolved gases down to very low levels.

The TDOS is the only system on the market with this range of processing options and is the most cost-effective and efficient moisture removal system available.

Highly portable, the TDOS can be used on numerous transformers each year to progressively reduce total moisture content and extend the life of these critical assets.

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Description

Automatic filter regeneration: patented drying technology

The TDOS is a truly unique oil filtering system in that it employs large capacity adsorbent filters to remove moisture in the insulation down to very low levels.

However, unlike other adsorbent systems that require frequent changing of the media, the water removal filters on the TDOS are automatically redried daily by the system - with no operator involvement required.

To truly differentiate itself from other systems available, the TDOS also includes the ability to remove all gases from the transformer via a selectable / optional vacuum degassing cycle.

These two functions provide transformer owners with a wide range of oil processing options with a single system; along with the ability to remove the main issues affecting the operational life of the transformer at very low ongoing cost.

Energized transformer oil filtration: effective removal of moisture from the transformer insulation

Designed for long term, unattended operation on energized transformers, the TDOS uses large capacity adsorbent filters to remove moisture in the oil and cellulose insulation to very low levels. Typically used as a portable piece of equipment on a stand or trailer, the TDOS can be used on a number of transformers annually.

Using a patented process, the water removal filters are automatically redried at regular intervals, ensuring maximum water removal efficiency & low ongoing cost of operation (i.e.: extremely low consumables requirements). The filters are typically changed every 18-24 months.

The benefit of the TDOS filter adsorption water removal method rather than the alternative continuous high vacuum systems is that it does not remove the nitrogen blanket from the transformer, disturb the oil DGA, and remove lighter fractions / aromatics from oil, altering its chemical qualities.

Optional Treatment Cycles: multiple oil processing options

With three optional treatment cycles: Analysis; Degassing; & water removal. the TDOS is the most versatile online dry out system available.

By including an optional module for acidity reduction or additive dosing, the all-round oil treatment capabilities of the TDOS are even broader.

Regenerating the water removal filters at regular intervals considerably increases water removal efficiency and accelerates the process of removing water from the transformer insulation. The water removal filters are typically only replaced every 2 years, providing an extremely low-cost solution to managing water levels in transformers.

Simple to operate, with a safety-first approach

Because the TDOS is designed for long term unattended operation, we have designed it to be simple to use, include numerous interlocked safety features; along with web based remote monitoring & communications as standard.

It provides a safe and cost effective solution for accurate water contamination analysis, water in cellulose reduction and gas from oil removal.

With a sound history of reliability and many fail-safe features, the TDOS provides an economical and effective alternative to many current methods. It is compatible with both mineral and FR3 oils.

The Trojan requires virtually no maintenance, and has a proven history of safe, unattended operation.

Features

Effective removal of gases and moisture on energized transformers of all sizes, oil volumes and types (conservator; nitrogen blanket).
Highly portable unit that can be easily rotated between transformers
Designed for long term unattended operation on energized power transformers
An adsorbent based system with patented filter redrying technology: water removal filters with a life span of 2-3 years.
Three (3) selectable online oil treatment cycles (water in Oil Analysis; oil degasification; moisture removal)
Simple, safe and easy to follow HMI led process for commissioning, treatment program selection and drain cycles.
PLC controlled with HMI interactive screen
Multiple interlocked safety cut-outs automatically shut down and isolate the system from the transformer
Speed control
Remote communications standard: monitoring, operation and data download
Single or three Phase options; various voltages

Benefits

Extends the natural life of the transformer by reducing moisture in the insulation and removing dissolved gases down to very low levels
No effect on oil DGA during analysis & water removal cycles
No requirement to take outages at any stage (working clearances excepted)
Low ongoing cost of use – minimal consumables & labor requirements
Improves the oil and cellulose dielectric
Reduce total moisture and gas issues across a large number of transformers

Specifications

TDOS	1000	2000
Flow Rate (LPH / GPH)	1500 / 396	2500 / 660
Moisture reduction to	≤ 2ppm	≤ 2ppm
Gas reduction to	≤ 0.25%	≤ 0.25%
Particulate Reduction	1 μm	1 μm
Manufacture Material	Stainless steel	Stainless steel
PLC control with HMI	Yes	Yes
Water in oil sensor	Inlet	Inlet
Safety Hose package	Yes	Yes
Remote communications package	Yes	Yes
Dimensions	Excludes mounting option
L (mm / inches)	1450mm / 57"	1800mm / 71"
W (mm / inches)	1010mm / 40"	1010mm / 40"
H (mm / inches)	1900mm / 74"	1900mm / 74"

Weight (kg / lbs)	650 / 1435	800 / 1764

Power Supply
Phases	Single / Three	Single / Three
Voltage	As requested	As requested
Hz	50 / 60	50 / 60

Mounting: Trailer / Stand	Either	Either
Additive Dosing Module	Optional	Optional
Acidity Reduction Module	Optional	Optional