Nominal frequency fn :- 0,1…460 Hz
Nominal system voltage Un :- DC 0…650 V
Supply voltage US (also see nameplate) :- AC 19.2…55 V
Frequency range US :- 42…460 Hz
Supply voltage US :- DC 19.2…72 V
Power consumption :- ≤ 14 VA
Response value Ran1 :- 1 kΩ…10 MΩ
Measuring voltage Um:- ≤ 50 V
Measuring current Im (at RF = 0 Ω) :- ≤ 280 μA
Internal DC resistance Ri :- ≥ 180 kΩ
Operating uncertainty (1…20 kΩ) :- ± 1 kΩ/± 15 %
Operating uncertainty (1…10 MΩ) :- ± 0.1 MΩ/± 15 %
Display range measured value :- 1 kΩ…10 MΩ
Cable length :- ≤ 1200 m
Terminating resistor :- 120 Ω (0.5 W)
Rated contact voltage :- AC 250 V/DC 300 V
Making capacity :- AC/DC 5 A

The ISOMETER® of the IRDH275 series is designed to monitor the insulation resistance of unearthed main circuits (IT systems) AC, AC/DC 0…793 V resp. DC 0…650 V.
The AMPPlus measurement method meets the particular requirements of modern power supplies which often include rectifiers, converters, thyristor-controlled DC drives and directly connected DC components.
In these systems often high leakage capacitances against earth occur due to interference suppression measures.
The IRDH275 automatically adapts itself to the existing system conditions.

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Subject : BENDER IRDH275B-427 Insulation Monitoring Device

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