Insulation monitor RN 5897/300

Safety for mobile generators

The insulation monitor RN 5897/300 from the VARIMETER IMD series by DOLD was developed especially for use with mobile generators. In mobile applications, such as in emergency vehicles or on construction sites, electrical energy must be used to reliably prevent injuries and property damage. Furthermore, mobile generators need to guarantee immediate operational readiness, without requiring time-consuming procedures to set up safeguards (such as installing and calibrating grounding systems etc.). That’s why the safeguard “electrical separation with insulation monitoring and shutdown” is available. It triggers an automated shutdown within < 1 s if the insulation resistance sinks below 100 Ω / V. The RN 5897/300 meets these demands, and fulfills the requirements of DIN VDE 0100-551 for mobile generators.

The insulation monitor is suitable for system leakage capacitance of up to 30 μF, and is designed for universal use in ungrounded AC, DC and AC/DC networks. Besides an adjustable alarm threshold, the insulation monitor also has an adjustable pre-alarm threshold. A multicolored LED status light keeps users informed continuously on the current operating status. The device enables reliable monitoring, even in a network without current.