ISOMETER® IR470LY
- Insulation monitoring device for AC IT systems
- Application main circuits
- According to IEC 61557-8
- Two separately configurable response values
- Multi-functional LC display
The 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.
The systems to be monitored should not contain DC components. Due to the measuring principle, insulation faults downstream of directly connected rectifiers are indicated with increased response sensitivity. The set response values apply to the pure AC system only.
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- Insulation monitoring for AC, 3(N)AC systems 0…793 V (IT systems)
- Nominal voltage extendable via coupling device
- Response values, adjustable 1…200 kΩ
- Connection monitoring system/earth
- Power ON LED, Alarm LED for signalling AC, L+, L- insulation faults
- LED bar graph indicator for signalling AC, L+, L- insulation faults
- Connection for external kΩ indication
- Combined test and reset button
- Connection external test/reset button
- Alarm relay with two potential-free changeover contacts
- Selectable N/O or N/C operation
- Fault memory behaviour, selectable
- AC, 3(N)AC main circuits (without directly connected rectifiers), such as motors, pumps, rolling mills without variable-speed drives, air cooling and air conditioning systems, lighting systems, heating systems, mobile generators, building services, domestic electrical installation practice, etc.
Optional accessories for ISOMETER® IR470LY
External kΩ measuring instruments
Coupling devices
| Type | Art. No. |
|---|---|
| 7204-1421 | B986763 |
| 9604-1421 | B986764 |
Coupling devices
| Type | Nominal system voltage Un | Art. No. |
|---|---|---|
| AGH204S-4 | AC 0…1650 V | B914013 |
| AGH520S | AC 0…7200 V | B913033 |
Variants of ISOMETER® IR470LY
| Type | Supply voltage US | Art. No. |
|---|---|---|
| IR470LY-40 | AC 230 V | B91048007 |
| IR470LY-4011 | AC 24 V | B91048012 |
| IR470LY-4012 | AC 42 V | B91048002 |
| IR470LY-4013 | AC 90…132 V* | B91048011 |
| IR470LY-4015 | AC 400 V | B91048008 |
| IR470LY-4016 | AC 500 V | B91048018 |
| IR470LY-4017 | AC 690 V | B91048017 |
| IR470LY-4018 | AC 440 V | B91048024 |
| IR470LY-4021 | DC 9,6…84 V* | B91048006 |
| IR470LY-4023 | DC 77…286 V* | B91048026 |
Other supply voltages on request
* Absolute values
* Absolute values
Downloads for ISOMETER® IR470LY
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