ISOMETER® isoHR1685DW Insulation monitoring device for insulated (elevating) work platforms Image similar

Insulation monitoring device for insulated (elevating) work platforms Intended use The device isoHR1685DW is used to monitor the insulation resistance of insulated elevating work platforms that allow work on live overhead lines. The device can also be used in other applications where earth clearance of working platforms must be ensured, for example in industrial hydrogen electrolysers. The specific measurement method AMPPLUS monitors the insulation resistance also in installations where extremely high system leakage capacitances to earth exist due to interference suppression methods. Adaptation...

Device features ISOMETER® for insulated elevating work platforms and rail • Continuous monitoring of the insulation levels of elevating work platforms even during operation • Measurement of high-resistance insulation faults 100 kfl...100 MO • Automatic adjustment to high system leakage capacitances • Combination of AMPPLUS and other profile-specific measurement methods • Separately adjustable response values Ran1 (Alarm 1) and Ran2 (Alarm 2) for prewarning and alarm • Connection monitoring • Device self test with automatic alarm message in the event of a fault • History memory with real-time...

Connection to an elevating work platform

Device profiles The adaptation to different applications is achieved by selecting a device profile. The following device profiles are available. Response time Power circuits Response value Response time High capacitance Response value

Response time Response value Response time Response value

Leakage capacitance diagram The determination of the leakage capacitance depends on the size of the insulation resistance. The following diagrams show the relationship Example: Insulation resistance 50 kΩ => min. measurable leakage capacitance 35 μF Insulation resistance 5 kΩ => min. measurable leakage capacitance 210 μF

Measuring circuit for insulation monitoring Measuring circuit (IC1) Supply circuit (IC2) Output circuit 1 (IC3) Output circuit 2 (IC4) Output circuit 3 (IC5) Control circuit (IC6) Rated voltage Measuring voltage Um (peak) ± 50 V Measuring current Im (atRF = 0 O) < 1 |jA Permissible extraneous DC voltage Ufg < 1600 V Permissible system leakage capacitance Ce 0...1 |jF for Un > 500 V no longer in accordance with IEC61557-8 Operating mode Functions High level Low level Rated impulse voltage Rated insulation voltage Safe isolation (reinforced insulation) between Response values Ran (profile-dependent)...

Serial interface Interface Protocols Connection Environment / EMC RS-485 BMS; Modbus RTU Terminals A/B Shield: terminal S ≤ 1200 m 2-core, ≥ 0.6 mm2, z. B. J-Y(St)Y 2x0.6 Cable length Shielded cable (shield to functional earth on one end) Terminating resistor, can be connected (Term. RS-485) 120 Ω (0.5 W) Device address, BMS bus 2…90 Device address, Modbus RTU 1…247 Baud rate 9.6 / 19.2 / 38.4 / 57.6 / 115 kB Parity even / odd Stop bits 1 / 2 / auto Ambient temperature Stationary use Transport Long-term storage Classification of climatic conditions acc. to IEC 60721: Stationary use (IEC 60721-3-3)...

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