The ISOMETER® iso685-D is an insulation monitoring devices for IT systems in accordance with IEC 61557-8. It is universally applicable in AC, 3(N)AC, AC/DC and DC systems. AC systems may include extensive DC-supplied loads (such as rectifiers, inverters, variable-speed drives).

Characteristics of ISOMETER® iso685

• Insulation monitoring for unearthed systems AC, 3(N)AC 0…690 V, DC 0…1000 V
• Nominal voltage extendable via coupling devices
• Two separately adjustable response values 1 kΩ…10 MΩ
• Combination of AMP^PLUS and other profile-specific measurement methods
• Continuous measurement of the capacitance, voltage and system frequency
• Predefined measurement profiles to meet different requirements
• Automatic adaptation to the system leakage capacitance
• Info button to display devices and network settings
• Self monitoring with automatic alarm message
• History memory with real-time clock (buffer for three days) for storing 1023 alarm messages with date and time
• Current and voltage output 0(4)…20 mA, 0…400 μA, 0…10 V, 2…10 V (galvanically separated) analogue to the measured insulation value of the system

• Permanent coupling monitoring of the measuring lines
• Freely configurable digital and analogue inputs and outputs
• Two separate alarm relays with two voltage-free changeover contacts
• N/O or N/C operation selectable
• High-resolution graphic LC display
• isoGraph function for time-related representation of the insulation resistance
• Remote setting of certain parameters via Internet (option; COMTRAXX® Gateway)
• Worldwide remote diagnosis via Internet (made available by Service only)
• Modbus TCP and Webserver
• Multilingual
• Internal system isolating switch for use in coupled systems (ISOnet) (version …-B)