ISOMETER® IRDH275
- Insulation monitoring device for AC and DC IT systems
- Application main circuits with connected frequency converters
- According to IEC 61557-8
- Automatic adaptation to the system leakage capacitance
- Info button to display the device setting
- This device series is in the discontinuation phase. -
Available until 31.12.2023.
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- Insulation monitoring for unearthed AC, AC/DC systems 0…793 V, DC 0…650 V
- Nominal voltage extendable via coupling device
- Two separately adjustable response values1 kΩ…10 MΩ
- AMPPlus measurement method
- Automatic adaptation to the system leakage capacitance
- Info button to display device settings and system leakage capacitance
- Self monitoring with automatic alarm
- Automatic self test, selectable
- Connection for external kΩ indication
- Test and reset button
- Connection external test/reset button
- Two separate alarm relays with two voltage-free changeover contacts
- N/O or N/C operation
- Backlit LC display
- RS-485 interface
- AC, DC or AC/DC main circuits
- AC/DC main circuits with directly connected DC components, such as rectifiers, converters, and thyristor-controlled DC drives
- UPS systems, battery systems
- Heaters with phase control
- Installations including switch-mode power supplies
- IT systems including high leakage capacitances
- Coupled IT systems
Optional accessories for ISOMETER® IRDH275
External kΩ measuring instrument 400 µA
External kΩ measuring instrument 20 mA
Coupling devices
| Type | Art. No. |
|---|---|
| 7204-1421 | B986763 |
| 9604-1421 | B986764 |
External kΩ measuring instrument 20 mA
| Type | Art. No. |
|---|---|
| 9620-1421 | B986841 |
Coupling devices
| Type | Nominal system voltage Un | Art. No. |
|---|---|---|
| AGH150W-4 | DC 0…1760 V | B98018006 |
| AGH204S-4 | AC 0…1650 (1300) V | B914013 |
| AGH520S | AC 0…7200 V | B913033 |
Variants of ISOMETER® IRDH275
| Type | Nominal voltage Un | Supply voltage US | Art. No. |
|---|---|---|---|
| IRDH275-435 | AC 0…793 V / DC 0…650 V* | AC 88…264 / DC 77…286 V* | B91065100 |
| IRDH275-427 | AC 0…793 V / DC 0…650 V* | AC 19.2…55 V / DC 19.2…72 V | B91065104 |
| IRDH275-425 | AC 0…793 V / DC 0…650 V* | DC 10.2…36 V | B91065108 |
| IRDH275B-435 | AC 0…793 V / DC 0…650 V* | AC 88…264 / DC 77…286 V* | B91065101 |
| IRDH275B-427 | AC 0…793 V / DC 0…650 V* | AC 19.2…55 V / DC 19.2…72 V | B91065105 |
| IRDH275B-425 | AC 0…793 V / DC 0…650 V* | DC 10.2…36 V | B91065109 |
* Absolute values
Downloads for ISOMETER® IRDH275
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