Summary Highlights
- Transformer maintenance, periodic maintenance, transformer routine tests, transformer measurements, transformer maintenance form and detailed condition assessment reports for power and distribution transformers in Bursa
- In response to the question of what transformer electrical tests are; Field transformer tests such as TTR (turn ratio) test, winding DC resistance, insulation (megger) test, short circuit impedance, load and no-load loss, power factor/tan-delta, magnetic balance and vector group checks
- Technical roadmap for oil treatment, oil regeneration and mobile oil processing solutions with transformer oil testing and transformer oil analysis (DGA, dielectric strength, humidity, acidity, color, furanic compounds, etc.) in accordance with IEC/ASTM standards
- After factory tests on new or renewed power and distribution transformers, field transformer acceptance tests, transformer testing and commissioning (FAT/SAT) procedures, current/voltage transformer tests, protection relay secondary/primary tests and MV cubicle function checks.
- Transformer fault maintenance, Bursa transformer repair, on-site mobile transformer repair service, hermetic type distribution transformer and dry type transformer repair maintenance, bushing and gasket replacement, elimination of oil leaks, cooling system and OLTC (on-load tap changer) maintenance
- MV transformer maintenance-repair, transformer service and HV/MV tests; Integrated solutions with transformer measurements, grounding and touch voltage tests, thermal camera and infrared controls and Bursa HV/MV test, maintenance and repair services
- As Bursa transformer maintenance company and Bursa transformer maintenance service; Bursa center, Nilüfer OIZ, DOSAB, Hasanağa, Kayapa, Kestel, Gürsu, İnegöl OSB etc. contracted transformer maintenance contract, periodic transformer maintenance service and project-based transformer maintenance-repair solutions in the regions
Service Details
We offer transformer maintenance, transformer tests, transformer oil analysis, fault maintenance-repair and transformer testing-commissioning services for industrial facilities using power and distribution transformers, factories in organized industrial zones, energy production-distribution facilities and large buildings in Bursa. Our goal as Bursa transformer maintenance company and Bursa transformer maintenance service; To ensure safe and efficient operation of transformers, to reduce unplanned downtime and to catch malfunctions before they occur with a predictive maintenance approach.
What is transformer maintenance and why is it mandatory? Over time, the insulation system ages due to heating-cooling cycles, short circuits, impact voltages, mechanical stress and environmental effects, connection points become loose, and the oil loses its properties. If regular transformer maintenance and routine transformer tests are not performed; Serious risks such as internal malfunctions, oil leaks, busbar and terminal burns, breaker trips and even fire may occur. For this reason, electrical transformer maintenance is an integral part of the periodic inspection obligations included in the Occupational Health and Safety Law No. 6331 and the Regulation on Health and Safety Conditions in the Use of Work Equipment, which is referred to as "transformer maintenance regulation" in practice.
We start our work with field exploration and current situation analysis. Transformer type (oiled/dry type), power, voltage level, brand, age, connected MV cubicle layout, protection-measurement relays, cable feeds and previous transformer maintenance and transformer test reports, if any, are examined. If necessary, factory routine tests (factory transformer tests) and previous transformer acceptance tests are reviewed, the scope for transformer electrical tests to be applied in the field is clarified and a transformer maintenance program appropriate for downtime is prepared.
Our suite of routine transformer tests includes the main electrical tests that answer the question 'what are transformer tests' that come to the fore in analysis: TTR (turns ratio) test, winding DC resistance measurement, insulation (megger) test, if necessary, field transformer tests such as power factor/tan-delta, short circuit impedance, load and no-load loss measurements, magnetic balance and vector group checks. With this transformer electrical tests; Winding faults, contact problems, connection errors, insulation weaknesses, unbalanced loads and assembly-related errors are detected at an early stage.
There are some differences between the transformer routine tests to be applied for dry type transformers and oil-filled transformers. While partial discharge, superficial contamination, temperature rise and air duct cleaning are prominent in dry type transformers; In oil-based transformers, additional parameters such as dielectric strength of the oil, moisture in the oil and the condition of the cellulose insulation are checked. In this context, power transformer tests and distribution transformer tests are planned separately; If necessary, special steps are determined for dry type transformer repair maintenance and hermetic type distribution transformer maintenance.
Transformer oil testing and transformer oil analysis in oil-filled transformers are one of the predictive maintenance tools that provide the most critical information about the internal health of the transformer. By taking oil samples according to IEC/ASTM standards; Parameters such as oil-soluble gas analysis (DGA), dielectric withstand voltage (BDV), moisture (water content), acidity (TAN), color, sludging tendency and, if necessary, furanic compounds are examined. Thus, arcing, partial discharge, overheating, cellulose aging and irreversible insulation damage can be detected at an early stage, even though the transformer looks 'normal' from the outside.
According to the results of transformer oil test and transformer oil analysis; Actions such as oil treatment (oil cleaning), oil regeneration, complete oil replacement, elimination of oil leaks or re-evaluation of the transformer loading profile are recommended. Oil treatment can be performed on-site with mobile oil treatment devices, thus the electrical and chemical properties of transformer oil can be improved without the need to dismantle the transformer from the field. When the trend of oil analysis results over the years is followed, the transformer maintenance period can be optimized according to numerical data.
In mechanical and visual controls; Transformer boiler, expansion tank, radiators, connection bolts, terminal blocks, MV-LV busbars, cable headers and splices, bushings, tap changer and cooling fans/pumps are examined in detail. Points with abnormal temperature increases in infrared scans made with a thermal camera; It may indicate a loose connection, overload, unbalanced phase current or internal fault. The field answer to the question of how to detect a broken transformer is revealed by evaluating such measurements, tests and observations together; When necessary, operations such as tightening, cleaning, oxidation removal, improvement of insulation distances and parts replacement are carried out on site.
Transformer fault maintenance and repair works; It covers many items such as eliminating oil leaks, gasket and bushing replacements, tap changer maintenance and adjustment, renewal of cooling fans/pumps, revision of breakers and separators in the MV switchgear, cleaning of transformer cabins and panels. In cases where more severe winding damage or extensive oil treatment is required, transformer repair, winding renewal, oil treatment/oil regeneration and workshop tests are organized together with solution partner workshops; Field and laboratory results are evaluated together. Thus, both rapid intervention in the field and detailed Bursa transformer repair process are managed in the workshop.
While transformer maintenance planning; Production stops, maintenance windows, shift order, number of transformers and criticality of the facility are evaluated together. While some checks are performed while power is on (online measurements, thermal scans, etc.), comprehensive electrical tests are performed by safely de-energizing the transformer. In this way, both occupational safety rules are complied with and the production plans of the facilities in Bursa are harmonized with the transformer maintenance periods. Contracted transformer maintenance contracts, periodic maintenance programs and emergency transformer fault response services are designed together according to need.
Service fee; The number and power of transformers, whether they are oily/dry type, the required test scope (routine tests, transformer acceptance tests, oil tests, MV cubicle and cable tests, etc.), the time to be spent in the field, the special test equipment to be used and the facility location are determined on a project basis. By exploring in and around Bursa, especially in areas such as Nilüfer OSB, DOSAB, Hasanağa, Kayapa, Kestel, Gürsu and İnegöl OSB; We offer clear, understandable and comparable transformer maintenance-repair, Bursa transformer repair and transformer test-commissioning offer options for different scope alternatives.
Frequently Asked Questions
How often should transformer maintenance be done? Is transformer maintenance mandatory and according to which regulation?
The general approach for power and distribution transformers is to carry out comprehensive transformer maintenance and routine transformer tests at least once a year. In transformers where high load, dusty-humid environment conditions or critical processes are fed, intermediate checks and transformer oil test/oil analysis can be repeated more frequently. Transformer maintenance is included in the periodic inspection obligations within the scope of the Occupational Health and Safety Law No. 6331 and the Regulation on Health and Safety Conditions in the Use of Work Equipment; in practice this framework is often referred to as “transformer maintenance regulation”.
Who can perform transformer maintenance? What is a transformer maintenance authorization certificate?
Transformer maintenance; It should be carried out by electrical/electrical-electronic engineers and field-trained technical teams who have high voltage experience, are familiar with the relevant standards and regulations, and can work with appropriate test devices. It is important for MV transformers to work under the control of EMO registered and authorized engineers for both safety and official reporting. In terms of occupational safety and legislation, responsibilities within the scope of the transformer maintenance authorization certificate; It should be carried out by engineers and teams who have received HV training and are registered in the relevant chambers.
What are transformer tests? What are transformer electrical tests and transformer routine tests?
The main transformer electrical tests we perform in the field are; TTR (translation ratio) test, winding DC resistance, insulation (megger) test, when necessary, power factor / tan-delta, short circuit impedance, load and idle loss measurements, vector group and magnetic balance controls and partial discharge monitoring. Transformer acceptance tests and transformer routine tests performed in the field after factory transformer tests on new or renewed transformers; It creates the reference value set for your facility. Depending on the scope of the project, MV cubicle tests, protection relay secondary/primary tests, cable insulation tests, grounding resistance-touch voltage measurements and transformer test and commissioning steps may also be included in the package.
Why are transformer oil testing and transformer oil analysis (DGA) so important? In what cases should it be done?
Transformer oil is a critical component that provides both insulation and cooling of the transformer. Transformer oil tests and DGA analysis performed according to IEC/ASTM standards; By examining the dielectric strength, moisture, acidity and gases formed in the oil, it reveals internal faults such as arcing, partial discharge, overheating and cellulose aging at an early stage. Transformer oil test and oil analysis should be repeated periodically, especially in older transformers, facilities with changing loading profiles, or if there are results approaching limit values in previous oil tests.
How to detect a broken transformer? At what symptoms should we call the transformer fault maintenance service?
Symptoms of a broken transformer include; These include above normal noise, odor or vibration, sudden changes in oil level, oil leakage, bushing cracks, abnormal temperature increases seen in the thermal camera, frequent opening of protection relays and decrease in insulation/BDV values in measurements. When such symptoms are observed, energizing the transformer should not be forced; An expert transformer fault maintenance service that can perform transformer electrical tests, transformer oil tests and visual checks should be commissioned in the field.
When we experience a transformer failure in Bursa, can we get on-site transformer repair and maintenance service?
Yes. We provide on-site transformer fault maintenance-repair and on-site transformer repair services for organized industrial zones and industrial facilities in Bursa. Many problems such as oil leaks, gasket and bushing problems, loose connections, overheating points, cooling system malfunctions and protection relay adjustment problems can be resolved in the field with our mobile equipment. For more extensive damages, we organize transformer repair, oil treatment and additional testing processes together with solution partner workshops; Thus, Bursa transformer repair and field transformer tests can be managed from a single source.
What is a transformer maintenance contract? What are the advantages of contracted transformer maintenance?
Transformer maintenance contract; It is a written agreement in which annual or multi-annual transformer maintenance, transformer routine tests, transformer oil tests and necessary MV cubicle-cable controls are planned in advance for the power and distribution transformers in your facility. Thanks to contracted transformer maintenance; Maintenance dates are not forgotten, legal periodic inspection requirements are met regularly, failure risks are reduced, budget planning becomes more predictable, and faults can be diagnosed faster because the same technical team has known the transformer for years.
What transformer acceptance tests and transformer testing and commissioning procedures are performed on the transformer we have newly installed?
Before a new or renewed power or distribution transformer is put into operation; Visual and mechanical checks, insulation tests, TTR (translation ratio) test, winding resistance measurements, load/idle loss tests, short circuit impedance measurement, partial discharge checks and, if necessary, high voltage withstand tests are performed. In parallel, MV cubicle tests, protection relay secondary/primary tests, grounding and touch voltage measurements are also completed. The totality of these steps constitutes the transformer acceptance tests and transformer testing and commissioning procedures carried out in the field; It ensures safe energization of the transformer.