ISOMETER® isoUG425 Insulation monitoring device for earth fault detection in unearthed DC systems up to 120 V Image similar

Insulation monitoring device for earth fault detection in unearthed DC systems up to 120 V Intended use The ISOMETER® isoUG425 is an insulation monitoring device for earth fault detection. It monitors the asymmetrical insulation resistance RF of unearthed DC systems (IT systems) with system voltages of DC 12…120 V. The maximum permissible system leakage capacitance is 50 μF. In order to meet the requirements of the applicable standards, customised parameter settings must be made on the equipment in order to adapt it to local equipment and operating conditions. Please heed the limits of the range...

Only use 60/75 °C copper lines. For UL and CSA applications: Connect the supply voltage via 5 A fuses. J The supply voltage Us applied to A1/A2 can be provided by the system voltage (DC+/DC-) when the DC system voltage is > 24 V. Otherwise a separate power supply is needed. For details about the conductor cross sections required for wiring, refer to chapter Technical data. Wiring diagram

Measuring circuit Permissible system leakage capacitance Ce < 50 |jF Measuring circuit (IC1) Supply circuit (IC2) Output circuit (IC3) Control circuit (IC4) Rated voltage Overvoltage category Response values Rated impulse voltage Response value Ran1 Response value Ran2 Relative uncertainty Ran Hysteresis Ran Undervoltage detection UDC Overvoltage detection UDC Relative uncertainty UDC Hysteresis UDC 1.100 kO (50 kfi)* 1.95 kO (25 kO)* ±15 %, at least ±2 kO 25 %, at least 1 kO 8.143 V (off)* 8.1.144 V (off)* ±5 %, at least ±0.5 V 5 %, at least 1 V Time response Rated insulation voltage Protective...

Switching elements Switching elements 2 x 1 n/o contacts, common terminal 11 Electrical endurance 10,000 cycles Rated operational voltage 230 V / 230 V / 24 V / 110 V / 220 V Rated operational current 5 A / 2 A / 1 A / 0.2 A / 0.1 A Necessary minimum contact load (relay 10 mA / DC 5 V manufacturer's reference) Connection Push-wire terminals Nominal current Conductor sizes Stripping length Rigid Flexible without ferrules Flexible with ferrules with/without plastic sleeve Multi-conductor flexible with TWIN ferrules with plastic sleeve Opening force Test opening Ambient temperatures Classification...

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