In the context of Power Quality, the protection of sensitive loads cannot be entrusted to generic solutions. Electrical network anomalies – overvoltages, high-frequency disturbances and impulsive components – require specific devices capable of ensuring operational continuity and reliability.
Among these, the ITT – IT series Isolation transformers represent a technology often considered “simple”, yet actually strategic for electrical power quality.
Why is galvanic isolation so important in modern installations?
The ITT – IT series Isolation transformers provide galvanic isolation between the power supply network and the load, eliminating any direct conductive path between the two sides.
This feature makes it possible to:
- reduce electrical risks for operators and equipment
- attenuate electrical disturbances affecting sensitive devices
- limit the propagation of overvoltages and impulsive transients
- prevent the transfer of DC components between circuits
In an increasingly interconnected industrial environment, galvanic isolation becomes a key factor for the overall stability of the installation.
Which power network problems can be mitigated with an Isolation transformer?
Electrical networks are subject to phenomena that are often underestimated:
- high-energy impulsive disturbances, including atmospheric-origin events
- high-frequency noise (HF NOISE) harmful to electronic devices
- discontinuities and micro interruptions
- interference between loads connected to the same network node
Isolation transformers act as both a physical and electrical barrier, helping stabilize load behaviour and improve the electromagnetic compatibility of the installation.
In which applications are Isolation transformers truly indispensable?
The use of Isolation transformers is particularly relevant when:
- sensitive electronic equipment is installed
- high system reliability is required
- unpredictable network disturbances are present
- different sections of the installation must be electrically separated
- short-circuit currents must be reduced
In industrial environments, telecommunications and control systems, their role is not ancillary but structural.
Can Isolation transformers also adapt voltage levels?
In addition to galvanic isolation, the ITT – IT series transformers provide:
- the creation of isolated neutral systems
- protection against overvoltages
- voltage adaptation to the functional values required by the installation
This makes them a multifunctional solution capable of improving both safety and power supply quality.
FAQ – Frequently asked questions about Isolation transformers
Does an Isolation transformer solve all Power Quality problems?
No. It is an effective solution for galvanic isolation and disturbance attenuation, but it does not replace devices such as Voltage Stabilisers or active filters when voltage regulation or harmonic compensation are required.
Is it always necessary to install an Isolation transformer?
No. In already stable networks with non-sensitive loads, it may not be essential. However, it becomes critical in the presence of advanced electronics or documented disturbances.
What is the main advantage of an Isolation transformer compared to other solutions?
The absence of a direct connection between the network and the load eliminates many disturbance causes at their source, rather than simply limiting their effects. In applications where service continuity during the first earth fault is required, it becomes indispensable for implementing this protection system.
Does an Isolation transformer introduce losses or inefficiencies?
Like any electromagnetic device, it introduces losses. However, when correctly sized, the reliability benefits significantly outweigh the associated energy cost.
Can an Isolation transformer replace a Voltage Stabiliser?
No. The two technologies have different functions: the transformer isolates, while the Voltage Stabiliser regulates voltage. In many applications, the two solutions are synergistic and complementary.
