VARIMETER IMD 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, testing RCD, 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, even at extreme temperatures. 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 up to 300 V rated voltage. 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 guarantees reliable monitoring, even in a network without current. Advantages and customer benefit Increased protection for operators and devices No limitation of cord length or number of connected devices Ready for immediate use No requirement for an electrician to calibrate protective safeguards Wide temperature range from - 40 ... + 70 °C Multi-color LED device status light to display operational status Easy to adjust parameters with a rotary dial Early recognition of insulation faults

Insulation monitor RN 5897/300 Technical features In accordance with DIN VDE 0100-551 for mobile generators Operational temperature range: - 40 ... + 70 °C Trips within < 1 s, if the insulation resistance drops below 100 Ω / V Insulation monitoring in accordance with IEC/EN 61557-8 2 response thresholds which can be set independently (e.g. available for pre-alarm and alarm) Adjustment range 1. Response value (pre-alarm): 20 kΩ … 1 MΩ Adjustment range 2. Response value (alarm): 10 kΩ … 250 kΩ 1 changeover each for insulation fault pre-alarm and insulation fault alarm Load or closed current principle...