Technical support
Who are you and what do you do?
We at Varat have been engaged for over forty years in the design, manufacture and marketing of state-of-the-art solutions for various electrotechnical and electronic sectors. Our proposal includes transformers, stabilizers and voltage regulators intended for multiple production areas, related to companies that operate in multiple segments of the market.
From industrial plants to the world of automation, from railway to naval, from oil-mining to photovoltaic, from food to the realization of test rooms and test benches: our lines support the activity of companies and companies in national and international contexts.
Guaranteed reliability, operational efficiency, customization of devices, Eco-sustainability in the selection of materials and in the conduct of processes and the obtaining of quality certifications issued by the most important control bodies are for us the fundamental principles on which to base our business path.
What is your product range?
Our services best meet the needs of companies belonging to different production sectors, thanks to a range of cutting-edge devices in the field of electrical engineering and electronics.
Varat’s offer includes:
- Transformers
- Auto-transformers
- Reactors
- Power suppliers
- Stabilizers
- Voltage regulators
- Equipment of different types
Each of our products is tested before marketing, and is the result of a project, a choice of materials and a process that aims at energy saving, in compliance with a vision of sustainable entrepreneurship.
Who should I contact?
You can contact us via the info@varat.it email address or by calling +39.059.775677.
In which sectors are you specialized?
Varat has been specialized for over 45 years in electrotechnical and electronic solutions in the following sectors:
- Automation and industrial plants
- Railways
- Naval
- Oil extraction
- Photovoltaic
- Certified instruments for test rooms and test benches
- Industrial engineering
Do you have a technical support service?
Of course, Varat has a maintenance and after-sales service implemented for the realized plants. For any need you can contact us by writing to the email address info@varat.itor by calling +39.059.775677.
Do you have a certificate?
The quality certificates and the homologation to the strictest quality parameters recognized by the major Italian and international certification bodies are for us Varat fundamental elements in the development of a leading electrotechnical proposal.
For this reason, we have obtained the certification of the US body Underwriters Laboratories Inc (UL), the Canadian one Canadian Standards Association (CSA), the German body TUV and the ISO 9001 certification by the independent Swiss body IAS.
What are the power surges?
Voltage changes are oscillations of the voltage value with respect to the expected tolerance range, and are characterized by temporal times of variable duration in which the absence of flow of electricity is recorded.
What are the main causes that lead to power surges?
The causes that can give rise to this kind of phenomena, potentially very risky for electronic devices, are many, and provide:
- Storm
- Operations on the power line
- underdimensioned electrical system
- obsolete and damaged plant
How does a voltage regulator work?
A voltage regulator, also known in English as automatic voltage regulator (AVR), is an electronic device that automatically adjusts the voltage, based on previously set parameters. These parameters may be linked to the technical characteristics of the apparatus as appropriate.
What is a transformer and how does it work?
The transformer is an electric machine defined as static because it does not contain moving parts. Its purpose is to raise and lower, efficiently and without excessive losses, the value of the input voltage and current compared to those of the output.
The transformer is an electric machine defined as static because it does not contain moving parts. Its purpose is to raise and lower, efficiently and without excessive losses, the value of the input voltage and current compared to those of the output. A transformer can consist of two solenoids, wound on a ring on ferromagnetic material called magnetic core.
The winding to which energy is supplied is called primary, while the one from which the energy is taken is called secondary. When an alternating sinusoidal voltage is applied to the primary unit, due to the effect of magnetic induction, a magnetic flux with sinusoidal flow is created in the nucleus. According to the Faraday-Neumann-Lenz law, this variable flow induces a sinusoidal tension in the secondary one, which can be shown to be proportional to the ratio between the number of coils of the primary and those of the secondary.
Is it normal for a transformer to heat?
It is normal that in operation, both empty and under load, the transformer heats, due to some losses. Nevertheless, the temperatures reached by the transformer must not be high and must not exceed those of the insulation class or of the insulation system adopted.
Is it normal for a transformer to buzz?
It is normal that transformers emit sounds comparable to hums slightly perceptible and below 60 db to 1m: there are special constructive solutions to reduce this noise, both design and specific impregnation processes.