iso1685FR / iso1685FRM

Product informatie voor iso1685FR / iso1685FRM

The ISOMETER® iso1685FR… is an insulation monitoring device for IT systems in accordance with IEC 61557-8. It is applicable for use in AC systems.

Particularities of the ISOMETER® iso1685FRM
The only difference between the ISOMETER® iso1685FRM and the ISOMETER® iso1685FR is the following: By means of the Modbus-analogue converter M-7024, the ISOMETER® iso1685FRM provides an analogue output. Communication takes place via Modbus RTU. The DIP switch can be used to switch between the BMS and Modbus protocol.

Insulation monitoring is carried out using an active measuring signal which is superimposed via the integrated coupling of the IT system to earth.
If the impedance value Ze between the IT system and earth falls below the set response value Zan, the alarm LEDs ALARM 1 and ALARM 2 light up, and the alarm relays K1 and K2 are
switched on. In addition to the active method, an optional passive method can be activated which monitors the unbalance of the IT system by measuring the voltage between the star
point and earth of the IT system. If the voltage UN-PE between the star point and earth exceeds the set response value Uan, the alarm LEDs ALARM 1 and ALARM 2 light up and the alarm relays K1 and K2 switch.
Both measuring methods (active and passive) work in parallel to the alarm relays K1 and K2.
The integrated μSD card is used as data logger for storing all relevant events.
The following measured values, statuses and alarms are stored during operation:
• Impedance Ze between the system and earth
• Insulation fault Re between the system and earth (when the system capacity has been set)
• Voltage between the star point and earth
• System frequency
• Insulation fault
• Connection fault
• Device error