Yes, the I switch range of switches 20 to 125A are suitable for Isolation.
These devices are Switch-Disconnectors therefore they have the functions of

• Isolation - when in the “Open” position the isolation at a defined withstand voltage is assured between the open contacts of the main circuit of the switchgear.
• Load Switching - they are able to open and lose circuits under load

These two functions are defined in the standard IEC 60947

Released for:Schneider Electric UK