What is important when installing and commissioning transformers?

The correct installation and commissioning of transformers is a crucial step in achieving the performance and longevity of electrical systems. Careful planning and execution of this process ensures that transformers function optimally and fulfil safety and reliability requirements. Below are some important aspects to consider. 

Transformers are indispensable components of the energy infrastructure. Without transformers, it would not be possible to transport electricity from the power plant to the consumer with high efficiency. They increase or decrease the voltage of the electrical current and enable an efficient flow of energy over long distances. 

Before installing transformers 

Firstly, the preparation and siting of transformers is crucial. This requires a comprehensive site assessment to be carried out.  

The chosen location should provide sufficient ventilation to prevent overheating and allow easy access for maintenance work. In addition, protection against possible environmental influences must be guaranteed to extend the service life of the transformers. A stable foundation minimises vibrations and provides a stable structure that can withstand the loads.

Finally, it is important to obtain all necessary permits and regulations to ensure smooth installation and safe operation of the transformers.    

Installation and commissioning of transformers

Correct installation determines the safety of transformers and optimum commissioning ensures their functionality.  

1. Transport and storage: The transformers must be transported in such a way that they are protected from impact and moisture.  

2. Assembly of components: All transformer components must be assembled and connected as specified by the manufacturer.  

3. Wiring and connections: Similarly, all electrical connections must be made carefully to avoid short circuits or other malfunctions.  

4. Leakage tests: The transformer cooling system and other components must be checked for leaks.  

5. Electrical tests: Insulation and resistance tests are carried out to check the integrity of the circuits.  

6. Comprehensive monitoring: Finally, the installation and use of monitoring systems is recommended in order to record operating data and recognise anomalies in transformers in good time. 

Ensuring initial monitoring and other essential checks 

When commissioning transformers, these specific tests ensure optimum performance:

• Protection system checks: All transformer protection systems should be tested and calibrated to ensure prompt response to faults.  
• Temperature and load monitoring: Observation of operating conditions to identify transformer overloads or overheating.  
• Customer familiarisation and training: Ensure that operating personnel have been fully trained on transformers and their insulating oils. 

Read more about insulating oil here:

• Transformer management: insulating oil is key

Follow-up monitoring of transformers for long-term performance and durability  

Transformers must be monitored after installation to ensure their performance and longevity. The best way to do this is to analyse the insulating oil in transformers.

Monitor transformers with transformer oil analyses  

Transformer oils are used for insulation and cooling and therefore contribute to operational safety. Analysing these insulating oils provides information about the condition of the transformers.  

Regular analyses are used to monitor impurities, water content and acidity, as these can impair the insulating properties of the oil. If there are any abnormalities, the oil should be cleaned or replaced to prevent corrosion and wear.  

This maintenance increases operational safety and extends the service life of the transformer.

Find out more in these articles:

• New transformers: Ensuring a long and uninterrupted service life  
• Case study insulating oil: Extending service life of transformers    

Conclusion: Thorough preparation, precise installation and continuous transformer oil analyses are important for transformers 

Transformers ensure effective and low-loss power transmission thanks to their ability to adapt voltages. Careful construction and commissioning of transformers are essential to ensure fault-free operation, longevity and safety standards.  

Thorough preparation, precise assembly and constant monitoring using transformer oil analyses not only ensure efficiency, but also minimise the risk of failures. Such an approach contributes significantly to the reliability and sustainability of the entire electrical infrastructure.  

Also interesting:

• Energy supply: What does a transformer failure mean in operation?