| Insulation monitoring relay for ungrounded (IT) supply systems up to 400 V AC, 15-400 Hz and up to 600 V DC Measuring range 1-100 / 2-200 kohm Supply voltage 24-240 V AC/DC Width 45 mm 1 + 1 or 2 change-over contacts screw terminal |
| Product brand name | SIRIUS |
| Product designation | Insulation monitoring relay with analog setting |
| Product type designation | 3UG4 |
| General technical data |
| Product function | Insulation monitor |
| Type of voltage | |
| for monitoring | AC/DC |
| for actuation | AC/DC |
| of the control supply voltage | AC/DC |
| Surge voltage resistance rated value | 4 000 V |
| Protection class IP | IP20 |
| Thermal current of the switching element with contacts maximum | 4 A |
| Reference code acc. to DIN 40719 extended according to IEC 204-2 acc. to IEC 750 | K |
| Reference code acc. to DIN EN 81346-2 | K |
| Reference code acc. to DIN EN 61346-2 | K |
| Product Function |
| Product function | |
| Fault storage | Yes |
| Control circuit/ Control |
| Control supply voltage at AC | |
| at 50 Hz rated value | 24 ... 240 V |
| at 60 Hz rated value | 24 ... 240 V |
| Control supply voltage at DC | |
| rated value | 24 ... 240 V |
| Operating range factor control supply voltage rated value at DC | |
| initial value | 0.85 |
| Full-scale value | 1.1 |
| Operating range factor control supply voltage rated value at AC at 50 Hz | |
| initial value | 0.85 |
| Full-scale value | 1.1 |
| Operating range factor control supply voltage rated value at AC at 60 Hz | |
| initial value | 0.85 |
| Full-scale value | 1.1 |
| Measuring circuit |
| Measurable line frequency | 15 ... 400 Hz |
| Auxiliary circuit |
| Number of NC contacts for auxiliary contacts | 0 |
| Number of NO contacts for auxiliary contacts | 0 |
| Number of CO contacts | |
| delayed switching | 2 |
| Main circuit |
| Operating frequency rated value | 15 ... 400 Hz |
| Connections/Terminals |
| Product function | |
| removable terminal for auxiliary and control circuit | No |
| Type of electrical connection | screw-type terminals |
| Type of connectable conductor cross-sections | |
| solid | 2x (0.75 ... 2.5 mm²) |
| finely stranded with core end processing | 2x (0.75 ... 2.5 mm²) |
| Connectable conductor cross-section | |
| solid | 0.75 ... 2.5 mm² |
| finely stranded with core end processing | 0.75 ... 2.5 mm² |
| AWG number as coded connectable conductor cross section | |
| solid | 20 ... 12 |
| stranded | 18 ... 14 |
| Tightening torque | |
| with screw-type terminals | 0.6 ... 0.8 N·m |
| Installation/ mounting/ dimensions |
| Mounting position | any |
| Mounting type | snap-on fastening on 35 mm standard rail |
| Height | 78 mm |
| Width | 45 mm |
| Depth | 100 mm |
| Required spacing | |
| with side-by-side mounting | |
| — forwards | 0 mm |
| — Backwards | 0 mm |
| — upwards | 0 mm |
| — downwards | 0 mm |
| — at the side | 0 mm |
| for grounded parts | |
| — forwards | 0 mm |
| — Backwards | 0 mm |
| — upwards | 0 mm |
| — at the side | 0 mm |
| — downwards | 0 mm |
| for live parts | |
| — forwards | 0 mm |
| — Backwards | 0 mm |
| — upwards | 0 mm |
| — downwards | 0 mm |
| — at the side | 0 mm |
| Ambient conditions |
| Ambient temperature | |
| during operation | -25 ... +60 °C |
