ISOMETER® iso1685DP Insulation monitoring device with insulation fault monitor for unearthed AC, AC/DC and DC power supplies (IT systems) Image similar

Insulation monitoring device with insulation fault monitor for unearthed AC, AC/DC and DC power supplies (IT systems) Intended use The device iso1685DP is used for monitoring the insulation resistance in large power supply systems designed as IT systems. In the “Fast 2000 μF” profile, the iso1685DP model can be used in photovoltaic systems. 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 event to high leakage capacitances is automatic....

Device features ISOMETER® for AC IT systems with galvanically connected rectifiers or inverters and for unearthed DC IT systems. • Isolation monitoring of IT systems • Measurement of insulation faults 200 fi.,.1 Mfi • 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 clock (buffer for 30 days)...

Wiring diagram Digital input Digital input CAN1, CAN2 No function RS485 Term. RS-485 termination off / on A, B, S RS-485 bus connection (A, B) BMS protocol: PE potential, connect one end of shield (S) Relay output for internal device errors (LED SERVICE) Relay output for alarm insulation faults (LED ALARM 2) Relay output for prewarning insulation faults (LED ALARM 1) Separate connection of E (earth) and KE (reference) to PE Connection to supply voltage (via fuses, 2 A each) Connection to L1/+ of the IT system via 1 A fuse

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

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 /m (atRF = 0 O) < 1.5 mA Permissible extraneous DC voltage Ufg < 1600 V Permissible system leakage capacitance Ce 0...2000 |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 Voltage test (routine test) acc....

Serial interface Terminals A/B Shield: terminal S Rel. humidity Area of application Cable length Shielded cable (shield to functional earth on one end) Terminating resistor, can be connected (Term. RS-485) Ambient temperature Device address, Modbus RTU Baud rate Stop bits Classification of climatic conditions acc. to IEC 60721: Switching elements Switching elements Insulation fault alarm 1 Insulation fault alarm 2 Classification of mechanical conditions acc. to IEC 60721: Device error Operating mode continuous operation Electrical endurance under rated operating conditions vertical, mains connection...

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