How does an insulation monitoring device (IMD) work?
Explore insulation resistance measurement, the Riso alarm and the relationship between measurement method and system.
Read the technical guideProduct families / Insulation monitoring · IMD / ISOMETER® isoLR275 + AGH-LR
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Bender ISOMETER® isoLR275 + AGH-LRInsulation Monitoring Device (IMD)
Monitoring device for AC, AC/DC and DC IT systems with low insulation resistances, used with AGH-LR.
TECHNICAL SUMMARY
Features that distinguish this model.
Medium voltage and low insulation levels
- Two separate response value ranges: 0.2…100 kΩ.
- Nominal voltage range with AGH-LR: AC 0…793 V / DC 0…1100 V.
- IT applications with system capacitance up to 500 µF.
- Isolated BMS / RS-485, 0(4)…20 mA output and alarm memory.
FROM PRODUCT TO TECHNICAL KNOWLEDGE
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Explore the product's function and its system's operating principle through technical explanations.
What is an insulation monitoring device (IMD)?
Progress from system type, voltage, leakage capacitance and application conditions to selecting a suitable IMD.
Read the technical guideSystem leakage capacitance and measuring methods in IMD selection
Learn how leakage capacitance and power electronics affect measurement methods and device selection.
Read the technical guideADEO Teknik · Bender distributor in Türkiye
Ask ADEO Teknik Technical product information and supply support for model selection, compatible components and current manufacturer documentation.
MODEL, ORDER AND ACCESSORY INFORMATION
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Model options and technical values
| Model | Nominal system voltage U n | Supply voltage U S | Order code |
|---|---|---|---|
| isoLR275-327 + AGH-LR-3 / / consisting of: / isoLR275-327 / AGH-LR | 3(N) AC 0…793 V / DC 0…1100 V | AC 19,2…55 V / DC 19,2…72 V | B91065702W / / / B91065700W / B98039022W |
| isoLR275-335 + AGH-LR / / consisting of: / isoLR275-335 / AGH-LR-3 | 3(N)AC 0…793 V / DC 0…1100 V | AC 88…264 V / DC 77…286 V | B91065703W / / / B91065701W / B98039022W |
Based on tables on the manufacturer's current product page. For marked-value footnotes, connection conditions and variant suitability, review Bender product source ↗ and the technical documents together. Listing an order code does not commit to stock availability or delivery time.
BENDER MANUFACTURER DOCUMENTS
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3 / 3 documents
Datasheet
isoLR275
isoLR275_D00127_D_XXEN.pdfTechnical summary source · pp. 1, 2Open document ↗Operating manualisoLR275
isoLR275_D00127_M_XXEN.pdfOpen document ↗Conformity documentisoLR275
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APPLICATIONS
Its role in your application.
Used in main circuits with directly connected converters, high leakage capacitance or slow voltage variations. Two separate thresholds provide prewarning and alarm at low insulation levels.
IN THE SAME APPLICATION GROUP
