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The H.VIR Infrared Window is a patented inspection window developed by Sorem for Infrared Thermographic inspections. These windows are made from sapphire glass which is transparent to infrared rays as well as the visual wavelength. They have 95% transmissivity for the infrared wavelength and provide a large angle of view with minimum signal attenuation.

The windows can be permanently fitted onto switchboard and transformer panels , thus allowing permanent inspection of the internal critical components like connections, switches, etc. to be conducted with safety at any time.

Without an H.VIR window, the high voltage installations are normally inaccessible due to safety reasons. The H.VIR window allows monitoring to be carried out without the need to  disrupt power supply.

The H.VIR window comes with a protective cover and O ring to prevent accidental impact damage and provides for water tightness.

This window has been tested & approved by the following Bodies:  

• Underwriters Laboratories Inc.
• Bureau Veritas
• NEMKO - Norwegian Board of Testing and Approval of Electrical Equipment
• Israel Standards Institution
• Elektrisitetstilsynet - Norwegian Electricity Inspectorate
• ABB Finland - Internal arc fault of 20kA , 1 sec.(Fastened onto front of HV panel)

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