ISOMETER® isoRW425 Insulation monitoring device for unearthed AC-, AC/DC and DC systems in railway applications up to 3(N)AC, AC/DC 440 V Image similar

Insulation monitoring device for unearthed AC-, AC/DC and DC systems in railway applications up to 3(N)AC, AC/DC 440 V Intended use The ISOMETER® monitors the insulation resistance RF (R mode) or the insulation impedance (Z mode) of unearthed AC/DC main circuits (IT systems) with nominal system voltages of 3(N)AC, AC, AC/DC or DC 0…440 V . DC components existing in 3(N)AC, AC/DC systems do not influence the operating characteristics when a minimum load current of DC 10 mA flows. The separate supply voltage Us allows de-energised systems to be monitored as well. The maximum permissible system...

Connection For UL applications: Only use 60/75 °C copper lines. For UL and CSA applications: Connect the supply voltage via 5 A fuses. For details about the conductor cross sections required for wiring, refer to chapter Technical data. Wiring diagram L1/+ L2/L3 Connection to the supply voltage Us via fuse (line protection): If supplied from an IT system, protect both lines by a fuse. Test / Reset Connect each terminal separately to PE: Use same wire cross section as for “A1”, “A2”. Connection to the system to be monitored Connection for the external combined test and reset button Connection to...

Measuring circuit Definitions Measuring circuit (IC1) Supply circuit (IC2) Output circuit (IC3) Control circuit (IC4) Rated voltage Overvoltage category Permissible system leakage capacitance Ce R mode: < 300 |jF Permissible extraneous DC voltage Ufg < 700 V Response values Supply voltage Us Tolerance of Us Frequency range of Us Power consumption 2.990 kO (40 kO)* 1.980 kO (10 kO)* ±15 %, at least ±1 kO 25 %, at least 1 kO 11.500 kO (off)* 10.490 kO (off)* ±15 %, at least ±1 kO 25 %, at least 1 kO Rated impulse voltage Rated insulation voltage Protective separation (reinforced insulation) between...

Environment/EMC Interface; protocol RS-485; BMS, Modbus RTU, isoData EMC IEC 61326-2-4, DIN EN 50121-3-2 Baud rate BMS (9.6 kBit/s), Modbus RTU (selectable), isoData (115.2 kBit/s) Cable length (9.6 kBit/s) < 1200 m Cable: shield connected to PE on one recommended: CAT6/CAT7 min. AWG23 side alternative: twisted pairs, shield J-Y(St)Y min. 2 x 0.8 Terminating resistor 120 O (0.25 W), internal, can be Device address, BMS bus, Modbus RTU 3.. .90 (3)* Switching elements Classification of mechanical conditions acc. to IEC 60721 Switching elements Operating principle Electrical endurance 2 x 1 n/o...

Screw-type terminals Nominal current Tightening torque Conductor sizes Stripping length Rigid/flexible Flexible with ferrules with/without plastic sleeve Multi-conductor rigid Multi-conductor flexible Multi-conductor flexible with ferrules without plastic sleeve Multi-conductor flexible with TWIN ferrules with plastic sleeve 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 The ISOMETER® was developed in...

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Bender GmbH & Co. KG Londorfer Straße 65 35305 Grünberg Germany Tel.: +49 6401 807-0 [email protected] www.bender.de © Bender GmbH & Co. KG, Germany Subject to change! The specified standards take into account the edition valid until 08.2024 unless otherwise indicated.