Summary Highlights
- Bursa transformer periodic inspection; It covers visual and mechanical inspection, electrical measurements, transformer oil tests in oil-filled type transformers and additional diagnostic tests if necessary, of MV/LV power and distribution transformers, transformer room (transformer center), MV cubicles, transformer grounding installation and cable-bar connections; The results are documented with the transformer periodic inspection report and transformer periodic inspection form compatible with the periodic inspection criteria published by the MoLSS for electrical group work equipment.
- Transformer periodic inspection; Within the scope of the Regulation on Health and Safety Conditions in the Use of Work Equipment, it is a periodic inspection activity that must be carried out at least once a year for all electrical installations such as electrical installations, grounding installations, lightning rod installations and accumulators and transformers. With this regulation, periodic inspection of the installations in question at least once a year has become mandatory, and if a shorter period is defined in the relevant TS EN power transformers and electrical installation standards, this period is taken as basis.
- In high voltage (HV) transformer periodic inspection; The transformer tank, conservator, radiators, bushings, tap changer, MV-LV busbar and cable connections, protection and control relays, breakers and separators, cable ducts and the ventilation and fire safety conditions of the transformer room are visually examined; Then, TTR (transformer turning ratio) test, winding resistance measurement, insulation resistance test, leakage current and grounding continuity measurements, if necessary, dielectric strength and oil/gas analysis tests of transformer oil, high voltage withstand test, no-load (open circuit) and load (short circuit) loss tests are applied.
- Periodic inspection of the transformer room; Cell and transformer room architecture, escape routes, locked doors, warning signs, barriers, integrity of MV cubicles and cable channels, continuity of transformer grounding and equipotential bars, fire detection and extinguishing systems, natural/mechanical ventilation, temperature and oil collection mechanisms are evaluated taking into account the relevant regulation, TS EN standards and EMO/TMMOB documents; Nonconformities affecting the safety of life and property are prioritized and stated in the report.
- Our Bursa transformer periodic inspection services; Nilüfer OIZ, NOSAB, DOSAB, Kestel and Gürsu OIZ, İnegöl OSB, Hasanağa, Kayapa, Demirtaş, TOSAB, Bursa Free Zone and factories outside the organized industry, shopping malls, hospitals, hotels, business centers, logistics warehouses and public institutions; We carry out the calibration with site-specific checklists, up-to-date test devices and detailed transformer inspection reports. Among the transformer periodic inspection companies in Bursa; We are positioned as a solution partner that can manage transformer testing, inspection and reporting processes from a single source.
- Transformer periodic inspections; By integrating electrical internal installation periodic inspection, grounding and lightning rod installation periodic inspections with generator, UPS and battery periodic inspections; We offer a contractual and traceable electrical periodic inspection package for facilities in Bursa, which can be registered with EquipmentNet and is compatible with OHS-KATIP processes. In this way, both your compliance with the legislation and your maintenance-control plans are gathered under one roof.
Service Details
Transformer periodic inspection; It is the process of inspecting and testing a facility's MV/LV power and distribution transformers, transformer room (transformer center), transformer grounding installation and associated MV/LV equipment in accordance with the relevant legislation and standards at certain periods. In practice, this service; It is referred to by different names such as transformer periodic inspection, transformer periodic inspection, transformer (transformer) periodic inspections, periodic inspection of the transformer room, periodic inspection of transformer grounding installation, high voltage transformer periodic inspection, transformer periodic tests or transformer periodic inspection report; The common purpose of all of them is to verify that the transformer operates safely, uninterruptedly and in accordance with the regulations.
The concepts of periodic inspection and periodic inspection refer to inspections, experiments and tests defined in the regulation, carried out at regular intervals to determine whether the work equipment endangers occupational health and safety. Transformer periodic inspection should not be confused with classical transformer maintenance services. Periodic maintenance; While it covers operating and service activities based on manufacturer recommendations, such as oil and filter change, connection tightening, cleaning, tap changer maintenance, periodic inspection and periodic inspection, which is also frequently mentioned under the title of "transformer periodic maintenance and control"; It is an independent testing and inspection activity that is mandatory in accordance with the Regulation on Health and Safety Conditions in the Use of Work Equipment, and at the end, an official transformer periodic inspection report is issued. Maintenance alone does not replace this report.
According to the relevant regulations; Periodic inspection of electrical installations, grounding installations, lightning rod installations, accumulators, transformers and similar electrical installations is mandatory at least once a year. For this reason, the transformer periodic inspection period is considered to be a maximum of 1 year unless a different period is defined in the standards. Transformer controls and measurements should be carried out at least once a year by the high voltage electrical control team and authorized engineers; It aims to reduce the risks of damage, fire and electric shock that may occur due to lack of supervision and control. In facilities with a high risk level and a critical possibility of malfunction or fire (hospital, data center, energy-intensive industrial facility, etc.), this period can be further shortened with intermediate checks.
Our Bursa transformer periodic inspection service; It includes MV/LV power transformers, distribution transformers, oil type and dry type transformers, indoor and field type transformers, compact transformer centers and MV cubicles. In this context; transformer tank and protection equipment, tap changer, MV-LV busbar and cable connections, transformer grounding and equipotential system, transformer room architecture and ventilation are evaluated as a whole; High voltage transformer periodic inspection tests are planned according to the site.
Before coming to the field; Transformer single line and detailed projects, nameplate information, previous transformer periodic inspection reports, commissioning tests, maintenance contracts (transformer maintenance agreement), fault records and high voltage operation responsibility agreements are examined. A site-specific control plan is prepared for the periodic inspection of the transformer, taking into account the power structure of the facility, redundant transformer-generator scenarios, short interruption tolerances and operating conditions.
During the visual and mechanical inspection phase; Transformer tank, conservator and expansion tank, radiators, cooling fans, bushings, connection clamps, tap changer mechanism, oil level and possible oil leaks and corrosion are checked. In addition, the wall and floor structure of the transformer room, locked doors, barriers, physical condition of MV cubicles, cable channels, lighting, emergency exits and warning signs are reviewed; Deficiencies that affect life safety are noted primarily according to "visual control" criteria.
During the electrical testing phase; The accuracy of the primary-secondary winding ratios is checked with the TTR (transformer turning ratio) test, winding integrity and connection quality are evaluated with winding DC resistance tests, and insulation levels between windings and winding-ground are determined with insulation resistance measurements. In transformers deemed necessary; Dielectric strength test of transformer oil, oil/gas (DGA) analysis, partial discharge controls, infrared heating measurements with thermal camera, high voltage resistance tests and idle (open circuit) and load (short circuit) loss tests are performed to detect possible hidden faults at an early stage.
Transformer grounding installation is under periodic inspection; Transformer body grounding, MV cubicle grounding, star point grounding, protection conductors and equipotential busbars are checked. By making grounding continuity measurements and, when necessary, specific soil resistance measurements; It is ensured that touch and step voltages remain within the limit values. APPLICATION; It is carried out in accordance with the methods specified in the relevant TS EN grounding and power transformers standards and the criteria in the Regulation on Health and Safety Conditions in the Use of Work Equipment; The results are included in the transformer grounding installation periodic inspection report.
Within the scope of periodic inspection of the transformer room; Natural and/or mechanical ventilation capacity, temperature values, oil pit and oil collection mechanisms, fire resistance of cabling and cable transitions, presence of fire detection and extinguishing systems, emergency lighting and emergency stop buttons, distances and barriers between MV cubicles and the transformer are examined. Thus, both electrical risks and fire and explosion risks are evaluated holistically.
Transformer periodic inspection report; It consists of inspection date, substation and facility information, transformer brand/model and power information, brand/model and calibration information of the test devices used, visual and mechanical inspection results, measured electrical values (TTR, insulation resistance, winding resistance, grounding values, etc.), additional tests performed, detected nonconformities and their severity, and results and recommendations sections. The report is prepared in compliance with the mandatory periodic inspection report format and criteria published by the Ministry of Labor and Social Security for electrical group work equipment and is signed by the relevant engineer and becomes a basis document that can be used in official inspections.
Transformer periodic inspection; Authorized electrical/electrical-electronic engineers (EMO members) and periodic inspection experts registered in the Equipnet system should carry out the inspection. Equipment registration number ensures compliance with the legislation and auditability of the periodic inspection; The transformer periodic inspection reports we prepare can be used as the basis document for the records processed into the Fikirnet system and occupational health and safety processes (risk assessment, annual plan, emergency plan, etc.) carried out through İSG-KATIP. While receiving the service, it is critical for the validity of your reports to verify the Equipnet registration number of the person who performs the periodic inspection through the MoLSS/E-Government and to ensure that the service is carried out under contract.
When choosing among transformer periodic inspection companies in Bursa; You should consider not only the price, but also the company's Equipnet registration status, the report format's compliance with the electrical group work equipment criteria specified in the regulation, the calibration documents of the test devices used, the referenced OIZ and facilities, and the ability to provide transformer maintenance, testing and high voltage operation responsibility services when necessary. Thus, you can fulfill your periodic inspection obligation and manage the maintenance and operation processes of your transformers from a single source.
Our Bursa transformer periodic inspection services; We can plan in integration with your regular transformer maintenance, high voltage operation responsibility, transformer maintenance and operation contracts, MV-LV panel maintenance and other electrical periodic inspections. Thus, production downtimes are reduced and all critical equipment such as transformers, generators, internal electrical installations, grounding and lightning rod installations are checked at the same time.
Frequently Asked Questions
What is transformer periodic inspection and why is it done?
Transformer periodic inspection; It is the visual, mechanical and electrical testing of power and distribution transformers, transformer room and transformer grounding installation at regular intervals in accordance with the relevant legislation and TS EN standards. Aim; To verify that the transformer that ensures energy continuity operates safely and in accordance with the regulations, and to protect the safety of life and property by reducing risks such as malfunction, fire and electric shock.
What is the transformer periodic inspection period? How often should transformer periodic inspection be performed?
According to the Regulation on Health and Safety Conditions in the Use of Work Equipment; Periodic inspection of electrical installations, grounding installations, lightning rod installations, accumulators, transformers and similar electrical installations is mandatory at least once a year. If a shorter period is defined in the relevant TS EN standards, this period is taken as basis. In other words, the transformer periodic inspection period is maximum 1 year under normal conditions; This period can be shortened with intermediate checks in high-risk facilities.
Is periodic transformer control mandatory? According to which legislation is it done?
Yes. Transformer periodic inspection; It is mandatory 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 published pursuant to this law. Transformers are considered among the equipment subject to periodic inspection within the electrical group work equipment and should be checked at least once a year in accordance with the principles specified in the mandatory periodic inspection report format and criteria for electrical group work equipment of the Ministry of Labor and Social Security.
Who can perform periodic transformer control?
Transformer periodic inspection; It must be carried out by persons or accredited inspection bodies who are authorized to perform periodic inspections of work equipment, come from the relevant engineering discipline (usually electrical or electrical-electronics) and are registered in the Equipnet system. It is of great importance for the acceptance of reports in official audits that the engineer who signs the report has the Equipnet registration number and the necessary professional qualifications; This number can be verified through ÇSGB/E-Government.
What tests and measurements are made during transformer periodic inspection?
Although the scope of control varies depending on the facility; visual and mechanical inspection of transformer tank, radiators, bushings, tap changers and connections; TTR (transformer turning ratio) test, winding DC resistance tests, insulation resistance measurements, grounding continuity and ground resistance measurements, dielectric strength test and oil/gas analysis of transformer oil if necessary, heating controls with thermal camera, high voltage resistance tests and, where appropriate, idle (open circuit) and short circuit (load) loss tests and transformer room ventilation and fire safety controls are the basic topics.
What is included in the transformer periodic inspection report? Is it valid in official inspections?
In the transformer periodic inspection report; It includes operating and facility information, transformer brand/model and power information, inspection date, used test devices and calibration information, visual and mechanical controls, measured electrical values (TTR, insulation resistance, grounding values, etc.), additional tests performed, detected nonconformities and their severity, and the results and recommendations section. As long as the report is signed by the authorized engineer and prepared in accordance with the legislation, it is accepted as the basis document showing that you have fulfilled your periodic inspection obligation in official inspections.
What is the difference between transformer periodic inspection and transformer periodic maintenance?
Transformer periodic maintenance; It covers operating and service activities such as oil, filter and gasket changes, connection tightening, cleaning, tap changer maintenance performed in accordance with the manufacturer's recommendations. Transformer periodic inspection; It is an independent inspection, testing and reporting activity that must be carried out at least once a year according to the regulations. Care; It helps prevent malfunctions and extend life, but it is not a substitute for a periodic inspection report alone. The most correct approach; Regular maintenance is supported by periodic inspection and periodic inspection.
Is there a difference in periodic inspection between dry type and oil type transformers?
The basic principles of periodic inspection in dry type and oil type transformers are similar; In both, visual inspection, electrical tests, grounding and transformer room safety are evaluated. However, in oil-based transformers, dielectric strength testing of transformer oil, control of oil level and oil leaks, and oil/gas analysis if necessary are of critical importance. In dry type transformers, dust on winding and bobbin surfaces, clogging of air ducts and temperature increases come to the fore.
How are Bursa transformer periodic inspection prices determined?
Bursa transformer periodic inspection price; The number of transformers is determined according to the power and type of each transformer (oil type, dry type, indoor/outdoor etc.), number of transformer rooms, number of MV cubicles, location of the facility, requested test scope (only basic measurements, oil/gas analysis and thermal camera tests included) and reporting language. After preliminary discovery or review of project documents; Different offer scenarios can be created, from narrow packages that include only transformer periodic inspection to integrated packages that also include other electrical periodic inspections.
What should I pay attention to when choosing a transformer periodic inspection company in Bursa?
When choosing among transformer periodic inspection companies in Bursa; You should pay attention to whether the company or engineer is registered in the Fikirnet system, whether the report format is compatible with the criteria published by the MoLSS for electrical group work equipment, the calibration documents of the test and measurement devices used, whether they work with EMO member electrical/electrical-electronic engineers, and the referenced OIZs, factories and facilities. In addition, planning periodic inspection integrated with transformer maintenance, testing and high voltage operation responsibility services provides a significant advantage in terms of operational safety and continuity.
How can I use transformer periodic inspection reports in Fikirnet and İSG-KATIP processes?
Transformer periodic inspection reports we prepare; It can be used to create and update periodic inspection records of your transformers via Fikirnet. Your occupational safety expert can reference these reports in the risk assessment carried out on İSG-KATIP, annual work plan, emergency plan and explosion protection document. Thus, transformer periodic inspection results do not remain just a technical report, but become an integral part of your occupational health and safety management system.