Function; Intended Use; Product Description; Device Features - Bender ISOMETER isoPV1685P Manual

Function

2 Function
2.1

Intended use

The device isoPV1685P is used for insulation monitoring of large photovoltaic systems up to 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.
The device isoPV1685P generates locating current pulses required for insulation fault location. That allows the
localisation of the insulation fault using permanently installed or mobile insulation fault locators.
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 of application indicated in the technical data.
Intended use also includes
• the observation of all information in the operating manual and
• compliance with test intervals.
Caution: This equipment is not intended for use in residential environments and may not provide adequate
protection to radio reception in such environments.
Do not make any unauthorised changes to the device. Only use spare parts and optional accessories sold or
recommended by the manufacturer.
Any other use than that described in this manual is regarded as improper.
2.2

Product description

The ISOMETER® isoPV1685P is an insulation monitoring device for IT systems according to IEC 61557-8 and -9.
It can be used in photovoltaic systems. Please refer to the technical data for the exact device specification.
2.3

Device features

ISOMETER® for photovoltaic systems.
• Insulation monitoring of large PV systems
• Measurement of insulation faults 200 ...1 M
• Automatic adjustment to high system leakage capacitances
• Separately adjustable response values R
• Connection monitoring of L+, L– for polarity reversal
• Integrated locating current injector up to 50 mA for insulation fault localisation
• Device self test with automatic alarm message in the event of a fault
• SD card with data logger and history memory for alarms
• Digital input
• Separate relays for insulation fault 1, insulation fault 2 and device error
Interfaces
• RS-485 interface for data exchange with other Bender devices
• BMS bus via RS-485 interface
8 isoPV1685P_D00007_09_M_XXEN / 07/2024
(Alarm 1) and R
an1 an2
(Alarm 2) for prewarning and alarm