Transformer Engineering Services

Providing value through knowledge sharing

With over 100 years’ experience in the transformer sector, Weidmann’s highly skilled engineers are the perfect partner to support your transformer consulting needs. Our in-depth knowledge of insulation material properties, application needs, processing methods, diagnostics and failure analysis enables us to offer the optimum solutions for enhanced transformer performance to maximize the safe and efficient delivery of electric power.

Available Services

Transformer Technical Services

Weidmann offers comprehensive support, design assistance, and engineering and technical expertise for power and distribution transformers. Our services will help verify and optimize an insulation system to ensure the best technical solution and avoid costly failures.

Insulation Engineering Design

Experts to assist you in the insulation of power transformers and other high-voltage equipment
Optimized insulation designs for your products
Specialists in the design of AC and DC lead exits
Experience and knowledge in solving and analyzing transients and polarity reversal fields for DC applications

Mechanical tests

Performed on materials, to international standards, to ensure mechanical strength, flexibility & suitability for transformer applications – crucial for transformer longevity & reliability

Tensile & bending strength
Compression strength & compressive characteristics of materials
Air permeability (Bendtsen) & surface finish

Chemical tests

Essential to evaluate the chemical properties & resistance of the materials used in transformers to ensure they can withstand the environmental factors & chemicals, affecting performance & lifespan

DP (Degree of Polymerization) of cellulose
Moisture content (Karl Fischer)
Nitrogen content (Kjeldahl)
pH & conductivity of aqueous extracts

Optical tests

Assesses the visual & optical properties of the material to provide valuable information about material quality & potential defects that may affect their performance

Particles in transformer oils
Particles contamination check by X-ray
Microscopy to x500

Electrical tests

Crucial to evaluate the electrical properties & performance of the material ensuring that it possesses the necessary dielectric strength, resistivity & overall electrical integrity to withstand high voltages & electrical stresses

Voltage tests up to 400 kV (AC), 600 kV (DC), & 800 kV impulse
Partial discharge tests
Dissipation factor tan delta
Conductivity & resistivity
Oil testing (breakdown voltage)

Thermal Aging

Used to assess the material’s ability to withstand prolonged exposure to elevated temperatures, which simulates the aging process that occurs during the transformer’s operation

Ovens for thermal aging up to 300°C
Climate chamber -40° - 200°C, 0 – 100% r.h.
Aging facilities for longterm thermal aging in oil up to 150°C

Technical Consulting

Weidmann’s deep knowledge of the energy sector stems from over 100 years of involvement and our commitment to remaining at the forefront of new developments, technology, and innovation. Our global network of expert engineers comes from a wide background in energy-related fields, providing consulting services to support your needs in a wide variety of areas.

DFMEA & FMEA for Transformers

Combining the expertise of our Engineering and Product Development Teams, we are able to help identify potential failure modes in design and assess the effects on product performance and reliability.

Identification of Failure Modes
Assessment of Severity
Assessment of Occurrence
Assessment of Detection
Risk Priority Number
Mitigation and Prevention
Documentation and Tracking

Transformer Design Review

Using our end-to-end support processes, Weidmann’s Transformer Services assist you in developing the best-fit solutions for enhanced transformer performance to maximize the safe and efficient delivery of electric power.

Electromagnetic Thermal Studies

A wide range of 2D and 3D calculations and investigations to support the design process

Up-to-date hardware & software to calculate Losses & Impedances – including with/without harmonic currents, 3D temperature distribution on tanks
Short circuit forces on windings, clamping structures, bus bars
Current distributions in high current windings occurring in industrial applications eg. converter & furnace transformers
3D analysis of electro-magnetic shields (shunts) used to reduce losses in the tank and/or clamping structure
3D temperature distribution on tanks and/or clamping structures with determination of hot spot due to losses induced by stray magnetic fluxes

Weidmann Knowledge

Combining over 100 years of industry experience and a professional team of program leaders to offer class leading education and seminar programs around the world.

Education & Seminar Programs

Designed to offer clients the opportunity to increase their own knowledge

Training & Development Initiatives

Programs that can be utilized and implemented within your own organisation

UTEC Case Study: INSULutions® DPE Paper is Top of the Class

DIELECTRIC MEASUREMENT IN A WIND FARM

TANK TEMPERATURE RISE VERIFICATION

TOP LEAD EXIT THERMAL ANALYSIS

GSU TRANSFORMER UPGRADE - TANK HOT SPOT

CONVERTER TRANSFORMER LOAD LOSSES

LV LOSSES

FORCES UNDER DOUBLE INRUSH CONDITION

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