The ISOMETER® IR420 monitors the insulation resistance of unearthed AC control circuits (IT systems) 0…300 V. If the systems to be monitored include DC components, such as switched-mode power supplies or solenoid valves, the display and operating characteristics may be affected.
The display and response values apply to pure AC systems. An external supply voltage allows de-energised systems to be monitored too.
Accessories
Type | Art. No. |
---|---|
Mounting clip for screw mounting (one piece per device) | B98060008 |
Type | Nominal system voltage* Un | Supply voltage* US | Response value Ran | System leakage capacitance Ce | Art. No. |
---|---|---|---|---|---|
IR420-D4-1 | AC 0…300 V, 42…460 Hz | DC 9,6…94 V / AC 16…72 V, 42…460 Hz |
1…200 kΩ | < 20 µF | B71016409 |
IR420-D4-2 | AC 0…300 V, 42…460 Hz | DC 70…300 V / AC 70…300 V, 42…46 Hz |
1…200 kΩ | < 20 µF | B71016405 |