Products 
Insulation monitoring Main circuits AC, 3(N)AC, DC, AC/DC
Main circuits AC, 3(N)AC, DC, AC/DC
DC main circuits
These are, for example, battery systems, solar systems or voltages generated via rectifiers.
AC/DC main circuits
AC systems with galvanically connected DC components such as converters, rectifiers or UPS systems.
| A-ISOMETER® for AC > 230 V | |
|---|---|
| A-ISOMETER® IR470LY | |
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The A-ISOMETER® of the IR470LY series is designed to monitor the insulation resistance of unearthed AC and three-phase systems (IT systems) AC/3(N)AC 0…793 V. In combination with a coupling device, the Isometers can also be used for higher voltages. An external supply voltage allows de-energized systems to be monitored too. |
| A-ISOMETER® IR470LY2-4061 | |
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The A-ISOMETER® of the IR470LY2 series is designed to monitor the insulation resistance of unearthed AC and three-phase systems (IT systems) AC/3(N)AC 0…793 V. Two separately adjustable response values/alarm relays allow a distinction to be made between "prewarning" and "alarm". In combination with a coupling device the device series can be used for higher voltages. |
| A-ISOMETER® IR470LY2-60 | |
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The A-ISOMETER® of the IR470LY2 series is designed to monitor the insulation resistance of unearthed AC and three-phase systems (IT systems) AC/3(N)AC 0…793 V. The device series is particularly suitable for systems requiring a high insulation level. The device can also be used for monitoring de-energized loads. |
| A-ISOMETER® for AC, AC/DC or DC systems >230 V | |
| A-ISOMETER® IRDH275 | |
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The A-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 measuring principle meets the particular requirements of modern power supplies which often include rectifiers, converters, thyristor-controlled DC drives and directly connected DC components. |
| A-ISOMETER® IRDH375 | |
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The A-ISOMETER® of the IRDH375(B) 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 measuring principle 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. |
| A-ISOMETER® IR1575 | |
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The A-ISOMETER® of the IR1575 series is designed to monitor the insulation resistance of unearthed main circuits (IT systems) AC, AC/DC 30…480 V resp. DC 0…480 V. The AMP measuring principle allows the Isometers to be used in systems with directly connected DC components. The IR1575 automatically adapts itself to the existing system leakage capacitances. An external supply voltage allows de-energized systems to be monitored too. |
