ISOMETER® isoPV1685DP Insulation monitoring device for unearthed photovoltaic systems Image similar

Insulation monitoring device for unearthed photovoltaic systems Intended use The device isoPV1685DP is used for insulation monitoring of large photovoltaic systems up to AC 1000 V and DC 1500 V designed as IT systems. The measurement method specially developed for slow voltage fluctuations (MPP tracking) monitors the insulation resistance even in systems equipped with large solar generator panels where extremely high system leakage capacitances against earth exist due to interference suppression methods. Adaptation to system-related high leakage capacitances also occurs automatically within the...

Device features ISOMETER® for photovoltaic systems. • Insulation monitoring of large PV systems • 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) for storing 1023 alarm messages with date and time • Freely programmable digital inputs/outputs • Separate relays for...

Wiring diagram Digital input: no function Digital input: Start insulation fault location in manual mode 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 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

Technical dataInsulation coordination acc. to IEC 60664-1/IEC 60664-3 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) < 0.7 mA Permissible extraneous DC voltage Ufg < 1600 V Permissible system leakage capacitance Ce 0...4000 |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...

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...

Ordering details Model Response value Supply voltage

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