ISOMETER® IR420-D6
- Insulation monitoring device for de-energised loads
- Application in TN, TT or IT systems
- According to IEC 61557-8
- Two separately configurable response values
- Multi-functional LC display
The offline monitor of the IR420-D6 series is designed to monitor the insulation resistance of loads in the de-energized state. These loads, usually temporarily operated or de-energized most of the time, e.g. fire extinguisher pumps, slide valve drives etc are supplied from solidly grounded or ungrounded systems. During the shut-down periods, however, humidity or other effects may cause insulation faults in the wiring or the loads which may go undetected. Switching the device on may then lead to the tripping of the protective device or may even result in motor fires and the device cannot be operated. In combination with a coupling device, the Isometers can also be used for higher voltages.
- Insulation monitoring device for de-energised loads
- Application in TN, TT or IT systems
- According to IEC 61557-8
- Two separately configurable response values
- Multi-functional LC display
The offline monitor of the IR420-D6 series is designed to monitor the insulation resistance of loads in the de-energized state. These loads, usually temporarily operated or de-energized most of the time, e.g. fire extinguisher pumps, slide valve drives etc are supplied from solidly grounded or ungrounded systems. During the shut-down periods, however, humidity or other effects may cause insulation faults in the wiring or the loads which may go undetected. Switching the device on may then lead to the tripping of the protective device or may even result in motor fires and the device cannot be operated. In combination with a coupling device, the Isometers can also be used for higher voltages.
Features
- Isulation monitoring for de-energised solidly grounded and unearthed systems AC, 3(N)AC and DC
- Nominal voltage extendable via coupling device
- Two separately adjustable response values 100 kΩ…10 MΩ
- LEDs: Power On LED, LEDs Alarm 1, Alarm 2 for signalling insulation faults
- Combined test/reset button
- Two separate alarm relays with one changeover contact each
- Fault memory behaviour, selectable
- Push-wire terminal (two terminals per connection)
Applications
- De-energized loads such as automatic fire extinguisher pumps, emergency drives, ship cranes, slide-valve drives in supply lines (gas, water, oil), motor-driven closing systems, diving pumps, drives for anchors, elevators, flue-gas valves and stand-by generators.
ISOMETER® IR420-D6 Variant(s)
| Type | Supply voltage* US | Response value Ran | System leakage capacitance Ce | Art. No.** |
|---|---|---|---|---|
| IR420-D6-1 | DC 9,6…94 V / AC 16…72 V, 42…460 Hz | 100 kΩ…10 MΩ | ≤ 10 µF | B71016415 B91016415 |
| IR420-D6-2 | DC 70…300 V / AC 70…300 V, 42…460 Hz | 100 kΩ…10 MΩ | ≤ 10 µF | B71016407 B91016407 |
* Absolute values
**(B7… = push-wire terminal / B9… = screw-type terminal)
Optional Accessories for ISOMETER® IR420-D6
| Type | Nominal system voltage* Un | Art. No. |
|---|---|---|
| AGH520S | AC 0…7200 V, 50…400 Hz | B913033 |
| Mounting clip for screw mounting (1 piece per device) | B98060008 | |
| Mounting frame XM420 | B990994 |
Downloads for ISOMETER® IR420-D6
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| UKCA - IR42x | Declarations of Conformity | 140.6 KB | 2022/12/2020.12.2022 | ||
| IR42x | CE Declarations of Conformity | 94.2 KB | 2022/08/1212.08.2022 | ||
| IR420-D6 | Manuals | 1.3 MB | EN | 2021/05/0707.05.2021 | D00117 |
| IR420-D6 | Datasheets | 542.3 KB | EN | 2024/07/3030.07.2024 | D00117 |
| XM420 interface options | Datasheets | 223.5 KB | EN | 2019/05/1313.05.2019 | D00051 |
| Changed variants of relays from goldplated to silver-plated contacts | Technical Information | 166.3 KB | EN | 2022/06/2727.06.2022 |