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Chapter 12 Helpful information
IT system
In an IT (isolated earth, derived from the French term isolé-terre) earthing system, the electrical
distribution system has no connection to earth at all, or it has only a high impedance
connection. Protection is provided by Potential control and insulation monitoring. In the event
of an insulation fault, an alarm is generated which is responded to with mandatory
troubleshooting and problem resolution. In the case of another Insulation fault or the
persistence of the first fault, the power to systems is switched off. The IT system offers the
highest possible continuity for the operation of a facility, but it is more complex to set up and
operate. IT systems are therefore used primarily in the chemical industry and in hospitals (e.g.
intensive care units and operating theatre).
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
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