Hitachi Industrial Equipment Systems Low Voltage Insulation Monitoring System i-moni

A low-voltage insulation monitoring system that supports preventive maintenance of electrical equipment without the need for power outages, monitored 24 hours a day.

Overview Cut unnecessary energy from unexpected accidents in advance. Significantly reduce testing costs by extending annual inspections. For the preventive maintenance of essential electrical equipment in factories and buildings, trust the Hitachi Low Voltage Insulation Monitoring System. Benefits of Introducing Insulation Monitoring - 24-hour monitoring eliminates the need for power outages. - Early detection of insulation deterioration signs allows for proactive management (preventive maintenance). - Insulation resistance testing during annual inspections can be reduced. Economic and Space-Saving - The use of multi-circuit insulation monitoring units simplifies installation and saves space. Additionally, costs per circuit can be reduced. - The absence of a voltage superimposition device makes it economical and contributes to space-saving without affecting circuits or loads. Stable Operation with the Same Detection Method as Residual Current Devices - Similar to proven residual current devices, this reliable method directly uses the magnitude of detected leakage current. - For determining insulation status, the "fundamental wave component of leakage current," from which harmonic components have been removed, is utilized. Appropriate Monitoring of Effective Leakage Current Based on Circuit Type - Single-phase and three-phase - Δ connection (S-phase grounded): Monitor using the fundamental wave effective component I0r, which shows a large value. - Three-phase - Y connection (neutral point grounded):

Monitoring and Control Equipment