CONTINUOUSLY IMPROVING TRANSFORMER INSULATION CONDITIONLIVE · 24/7

Monitoring is Visibility.Moisture Management is Action.

Most transformer moisture resides in cellulose insulation—not in the oil.
DryTrans continuously manages oil-paper moisture equilibrium while transformers remain energized.

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Reliability

Deliver safe and reliable power to the community.

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Risk Management

Identify, assess and mitigate risks to critical assets.

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Sustainability

Protect the environment and build a better, sustainable future.

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Asset Life Extension

Extend asset life, optimize performance and reduce life-cycle costs.

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Stewardship

Act as responsible custodians of critical infrastructure for future generations.

01Continuous Online Moisture Reduction

02Oil-Paper Equilibrium Management

03Relative Saturation Control

04No Shutdown Operation

05Engineered for Critical Assets

06Global Experience, Local Support

01Continuous Online Moisture Reduction

02Oil-Paper Equilibrium Management

03Relative Saturation Control

04No Shutdown Operation

05Engineered for Critical Assets

06Global Experience, Local Support

The Real Problem

Moisture is the Silent Driver of Transformer Aging.

Moisture accelerates insulation degradation, reduces dielectric strength, and increases the risk of unexpected failure.

Accelerated Aging

Moisture breaks down cellulose molecules and reduces degree of polymerization (DP).

Reduced Dielectric Strength

Higher moisture lowers insulation withstand capability and increases failure risk.

Bubble Formation Risk

Rapid temperature rise in wet insulation can create dangerous vapor bubbles.

Moisture Rebound

Moisture stored in paper returns to oil after temporary drying with conventional methods.

“”

You cannot improve insulation condition by monitoring alone.

The Physics

Understanding Oil–Paper Equilibrium.

Moisture continuously migrates between oil and paper. By removing moisture from oil, DryTrans shifts the equilibrium—causing moisture to flow out of the paper and into the oil, where it is removed continuously.

1Moisture in Paper

Cellulose insulation with moisture droplets

More than 95% of transformer moisture resides in cellulose insulation.

2Moisture Migrates to Oil

Moisture migrating from cellulose into transformer oil

Temperature and concentration gradients drive moisture movement.

3DryTrans Removes Moisture from Oil

Continuous online moisture removal while transformer remains energized.

4Equilibrium Shifts

Cellulose fibers submerged in transformer oil

Lower oil moisture creates a new oil–paper moisture equilibrium.

5Insulation Condition Improves

Dry paper-insulated transformer windings

Lower moisture improves dielectric performance and slows cellulose aging.

DryTrans does not dry oil. DryTrans manages the insulation system.

Our Philosophy

Monitoring vs. Moisture Management.

Monitoring (Visibility)

Moisture Management (Action)

Measures moisture

Removes moisture

Detects and alarms

Reduces and prevents risk

Provides trends

Influences equilibrium

Periodic / Manual

Continuous / Automatic

Observation

Intervention

Monitoring tells you there is a problem. Moisture Management helps solve it.

DryTrans exhibition booth showcasing moisture management systems

The DryTrans Philosophy

Manage moisture. Not just monitor it.

Our Engineering Approach

Phase_01

Cause

Moisture Ingress

Phase_02

Mechanism

Insulation Aging

Phase_03

Signal

Dielectric Weakness

Phase_04

Outcome

Failure Risk

86%Saturated

Active Diagnostic · Stage 04

Cascade approaching critical failure window. Intervention required.

Our Approach

The DryTrans Engineering Approach.

Designed to continuously protect insulation and extend transformer life.

Explore Our Technologies

Transformer

Moisture Migrates to Oil

DryTrans Removes Moisture

Equilibrium Shifts

Paper Dries

Insulation Life Extends

Group of Companies

EST · 1994

Our Parent Company

Three decades behind every DryTrans system.

AVACO was established in 1994 and has evolved into a leader in Predictive Maintenance and Condition Monitoring. DryTrans is developed under AVACO Solutions (FZC) — the result of two decades of transformer diagnostics, oil testing and condition monitoring expertise.

Part of

AVACO Group

Based in

Sharjah, UAE

Of Experience

30+ Years

Reliability

Real-World

What We Do

DryTrans designs and manufactures online moisture management systems for transformer oil and insulation — helping utilities and industries achieve:

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Our Integrated Concept

From Fault Monitoring to Life Extension

DryTrans combines advanced hydrogen & moisture monitoring with online moisture management to actively control insulation aging and extend transformer life.

Visibility

H2SCAN GRIDSCAN 6000

Hydrogen, Moisture & Temperature Monitor

Hydrogen (H₂) Monitoring
Detects early-stage electrical and thermal faults.
Moisture (H₂O) Monitoring
Tracks moisture in oil — a key aging accelerator.
Temperature Monitoring
Provides thermal context for accurate assessment.

pipeline.flow05 stages

> stage_03 · MANAGE — Actively remove moisture from oil and paper insulation.

System Output · Result

01 · Optimization A

Early Fault Detection

Preventing major failures before they start.

02 · Optimization B

Reduced Outages

Minimize unplanned shutdowns and service gaps.

03 · Optimization C

Lower Operating Cost

Reduce maintenance effort and extend assets.

04 · Optimization D

Higher Reliability

Improve asset performance and network stability.

Management

DRYTRANS MMS90

Online Moisture Management System

Continuous Moisture Removal
Advanced molecular sieve technology for efficient dehydration.
Oil–Paper Equilibrium Control
Reduces moisture in both oil and paper insulation.
Safe, Online & Non-Intrusive
Operates continuously while transformer remains in service.

Monitoring · active

Management · engaged

uptime99.8%

Field Performance

Proven results in the field.

DryTrans technologies are applied across utilities, power generation, and heavy industries for continuous insulation moisture management.

View All Case Studies

Case Study 01

400 kV GSU — Moisture Reduction Program

GSU Transformer, 450 MVA

Problem

Persistent moisture rebound in paper insulation after periodic oil filtration was accelerating aging on a critical 450 MVA generator step-up unit.

Solution

DryTrans online moisture management installed and energized — continuous removal from oil shifts the oil–paper equilibrium and dries the cellulose.

Results

Insulation moisture trended down from 3.8% to 1.1% over 14 months with zero outage time and stable transformer loading throughout.

Insulation moisture (RS%)

-2.7 RS %

M0M14

Insulation life extended without a single shutdown.

Read Full Case Study

Case Study 02

OLTC Service Life Extension

OLTC Fleet, 132 kV

Problem

Accelerated contact wear and carbon build-up across a 22-unit OLTC fleet was driving frequent maintenance windows and unplanned interventions.

Solution

TRTC retrofit deployed across the fleet — continuous on-load tap-changer oil treatment removes carbon and moisture while the asset stays energized.

Results

Measured contact wear rate fell 58% fleet-wide; oil quality stayed within spec between service intervals on every unit monitored.

Contact wear rate (μm / 1k ops)

-58 μm

Y0Y5

Maintenance intervals doubled with no service disruption.

Read Full Case Study

Case Study 03

Hydroelectric Step-Up Fleet

Generator Transformers, 220 kV

Problem

Breakdown voltage on a fleet of 220 kV hydro generator step-up transformers had drifted below factory baseline due to long-term moisture ingress.

Solution

DryTrans online drying integrated into the cooling circuit — moisture removed continuously while units remained available for dispatch.

Results

BDV recovered from 38 kV to 80 kV (+42 kV) and dielectric performance stabilized across the full fleet over an 18-month program.

Breakdown voltage (kV)

+42 kV

M0M18

Dielectric strength restored to factory baseline.

Read Full Case Study

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Why It Matters

Moisture Migration Never Stops.

Insulation moisture rebounds the moment treatment ends. Only continuous moisture management holds the equilibrium that protects transformer life.

Method 01 · Periodic

Periodic Dehydration

Treatment cycles · moisture rebound

DryReboundDryRebound

Temporary improvement
Effect fades as moisture migrates back from paper.
Moisture rebound
Equilibrium re-establishes within weeks after treatment.
Continued aging & risk
Insulation degradation continues between interventions.

Method 02 · Continuous

Continuous Management

Online · stable equilibrium

StableControlledProtected

Stable low equilibrium
Moisture is held below critical thresholds permanently.
Drastic aging reduction
Slower thermal-oxidative degradation of cellulose.
Longer asset life
Reduced failure risk and improved network reliability.

Continuous insulation life improvement

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Engineered for continuous transformer moisture management

TRAM50

Mid-range active moisture removal for power transformers

Capacity

Mid

Asset

Power TX

Mode

Active

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Trusted on the grid

Operators running DryTrans today

Selected utilities, TSOs and industrial operators deploying DryTrans across transmission, generation, and renewables fleets.

Maharashtra State Electricity Transmission

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Understand the Real Moisture Condition of Your Insulation System

Transformer insulation life is influenced by the interaction of moisture, temperature, dielectric condition, and aging chemistry. DryTrans technologies are designed to support long-term insulation moisture control through continuous moisture management.

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