TEKON ENERGY Co - A DOBLE Authorised Provider,Turkey

DOBLE ENGINEERING CO. BOSTON MA

Transformer Testing

As a transformer ages, its probable failure rate increases. Studies confirm that the average service life at failure for large power transformers is less than 15 years – but with a proper condition assessment and maintenance program, power transformers can continue to provide reliable service far beyond this average. In fact, the use of aggressive asset management strategies is changing the way we view the expected lifespan of large electrical power apparatus, especially transformers. Some of our clients have large power transformers on their systems that have been in service for over 70 years!

TEKON ENERGY Service condition assessments can help identify the present condition of your transformer and its components, estimating remaining life, make life extension suggestions and help with economic decisions for future repair or replacement actions.

DOBLE Engineering has developed a proprietary method for estimating the remaining service life of a transformer. This method builds upon a comprehensive condition assessment program, and is designed to systematically identify changes in transformer condition. With DOBLE's Condition Assessment solution, TEKON ENERJİ can reduce the risk of transformer failure and extend the life of your valuable capital assets.

A typical Condition Assessment evaluation includes the following:

• Review of historical test results and operating conditions
• Comparison of recent test results versus the historical results for the unit and similar designs in the DOBLE database
• Review of design and specifications
• Site inspection
• Electrical and mechanical integrity tests of the transformer
• Electrical insulation quality tests for the paper and oil insulation systems
• A full battery of oil diagnostics
• Thermal analysis

We'll get familiar with your system and individual equipment during the preliminary evaluation phase. We'll work with you to determine which transformers are the most critical and develop a strategy to evaluate these units in detail. We'll develop a proposal to meet your overall goals for condition assessment and maximum utilization of your equipment.

Transformer Condition Assessment

Internal Component Condition Assessment

Winding, Core and Core Clamp, Oil Distribution Box

• Inspect for Directed/Forced Oil Flow

Bus, Leads and Connections
Flux, Shunts and Flux Shields
Metallic Components

• Inspecting for Grounding Integrity

External Component Condition Assessmnt

Cooling Equipment ( Oil Pumps, Fans, Coolers, Radiators)

Load Tap Changer

• Inspect Internal Components and Gaskets
• Recommend Components Upgrades such as Oil Filtration System and Auto-Recharging Dehydrating Breather or LTC replacement (if applicable)

Bushings

• Test, Inspect and recommend Upgrades or Replacements

Control and Protective Devices

• Determine Replacement Criteria
• Inspect Wiring for Deterioration
• Inspect and Calibrate Gauges and Protective Devices, including Temperature Gauges, Pressure/Vacuum Gauges, Sudden Pressure Relay, Pressure Relief device, etc.
• The Surge Arresters

Gaskets

Tank Inspection

• Identify repairing Needs Based on Paint Condition/Integrity, Appereance of Rust and/or Corrosion
• Locate Leaks
• Assess Hardware, Clamps and Fittings

Oil Condition Assessment

• Gauge Physical and Chemical Properties, Moisture Content, and Perform Gas – in – Oil Analysis to Determine Best Course of Action – Oil Reconditioning or Oil Reclamation
• Inspect Oil Preservation Systems
• Recommend System Upgrades such as Nitrogen Generator

Paper Insulation Assessment

• Degree of Polymerization
• Moisture and Oxygen Content
• Furan Analysis
• Remaining Life Estimates

Thermo graphic Analysis

• Hot Spot Identification
• Hot Spot Cause Analysis
• Solution Recommendations

Customer Historical Record Review

• Prior Test Results
• Maintenance Records and repairs performed
• Service History; Overloads, Short Circuits and levels, etc

For more information, contact:

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