Offline monitor for de-energised AC, DC and 3(N)AC loads in TN,TT and IT systems

de-energised AC, DC and 3(N)AC loads in TN,TT and IT systems Device features • Insulation monitoring for de-energised TN, TT and unearthed systems AC, 3(N)AC and DC • Nominal voltage extendable via coupling device • Two separately adjustable response values 100 kQ...10 MO • LEDs: Power On LED, LEDs Alarm 1, Alarm 2 for signalling insulation faults • Combined test/reset button • Two separate alarm relays with one changeover contact each • Fault memory behaviour, selectable • Push-wire terminal Product description The "Offline monitor" ISOMETER® IR420-D6 monitors the insulation resistanceof deenergized...

Ordering information

Technical dataInsulation coordination acc. to IEC 60664-1/IEC 60664-3 Rated insulation voltage Rated impulse voltage 6 kV Protective separation (reinforced insulation) between: Supply voltage Measuring circuit Admissible extraneous d.c. voltage Ufg < DC 300 V System leakage capacitance Ce < 10 gF Supply voltage Us Frequency range Us IR420-D6-2: Supply voltage Us Frequency range Us Power consumption Displays, memory Display range, measuring value Percentage operating error (< 1 MO) Password Fault memory (alarm relay) LC display, multi-functional, non-illuminated 10 kO.20 MO ±15 % off/0.999 (off)*...

Technical data (continuation) Environment/EMC EMC acc. to IEC 61326 Operating temperature -25…+55 °C Climatic classes acc. to IEC 60721 (without condensation and formation of ice) Stationary use (IEC 60721-3-3) 3K24 Transport (IEC 60721-3-2) 2K11 Storage (IEC 60721-3-1) 1K22 Classification of mechanical conditions acc. to IEC 60721: Stationary use (IEC 60721-3-3) 3M11 Transport (IEC 60721-3-2) 2M4 Storage (IEC 60721-3-1) 1M12 Connection Connection Connection properties rigid flexible Two conductors with the same cross section rigid/flexible Stripping length Tightening torque, terminal screws...