DEVICE FOR PERMANENT INSULATIONCONTROL
Ensuring operational continuity
To ensure the operational continuity of an electrical system, IEC 60364-4-41 Standard “Low-voltage electrical installations – Protection for safety – Protection against electric shock” requires the system protection from direct and indirect contacts.
Among all the protection methods identified by the Standard, only IT distribution systems can guarantee greater operational continuity in case of a first fault to earth: in these systems, the circuit-breaker will not trip because the fault current is limited by the high insulation impedance. The IT distribution systems shall avoid the loss of production and ill service that power supply interruption could cause.
The first fault to earth should be immediately recovered, because a second fault to earth would cause the tripping of the protection devices (miniature circuit-breakers or residual current circuit-breakers), interrupting the power supply. The Standard requires the installation of an insulation monitoring device to signal the first fault, in order to avoid a second fault that could compromise the required operational continuity.
RI range performs continuous monitoring of IT systems insulation, in order to prevent any faults that may reduce operational continuity and, as a result, the efficiency of the system.
Plenty of benefits
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