An isolation transformer transfers electrical energy from the primary to the secondary side without a direct galvanic connection between the two sides.
In medical technology, special isolation transformers are used to operate electrical devices and systems from a galvanically isolated supply and to support requirements for low leakage currents.
IMED isolation transformers from EMO Systems are designed for medically used areas and medical-technical applications.
How does an isolation transformer work?
An isolation transformer has a primary and a secondary winding. The electrical energy is transferred through the magnetic field of the transformer. There is no direct conductive connection between the primary and secondary sides.
This creates a galvanic isolation of the power supply.
Important: an isolation transformer is no licence to touch electrical conductors. As the manufacturer states explicitly in its product documentation, an isolation transformer does not, for example, prevent a circuit from being closed by touching both output poles at the same time.
Medical isolation transformers
Medical isolation transformers are used when the power supply of medical devices has to meet particular requirements for electrical safety and low leakage currents.
According to the product information, typical applications of IMED isolation transformers include:
- medical-technical equipment
- IT equipment in hospitals
- printers
- analysers
- surveillance cameras
- video monitors
- other technical systems in medically used areas
IMED isolation transformers
The IMED product family covers several power classes, including IMEDe 150, IMEDe 300, IMEDe 600, IMEDe 1000 and IMEDe 2000.
The right choice depends on the power required, the application and the requirements of the system in question.
Insulation monitoring with the ELG
In a galvanically isolated medical power supply system, conventional protective measures on the mains side cannot detect insulation faults on the secondary side in the same way.
The ELG 130060 insulation monitor therefore monitors the insulation resistance between the medical supply circuit and earth potential. If a defined limit is undercut, it gives an optical and acoustic warning.
FAQ: Isolation transformers
What is an isolation transformer?
An isolation transformer is a transformer that galvanically separates its primary and secondary sides and transfers electrical energy through a magnetic field.
Why are isolation transformers used in medical technology?
Medical isolation transformers are used to supply medical devices from a galvanically isolated power source and to support requirements for low leakage currents.
What is the difference between an isolation transformer and a mains transformer?
An isolation transformer is used specifically for the galvanic isolation between its primary and secondary sides. The actual design and protective effect depend on the transformer and the application.
What does an insulation monitor do?
An insulation monitor monitors the insulation resistance of an electrically isolated circuit and warns when it falls below a defined limit.
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