ISOMETER® IR123P Insulation monitoring device for mobile generators

Device features • Insulation monitoring for unearthed AC systems (IT systems) 100.. .300 V • Automatic adaptation to the existing system leakage capacitance • Optimised measurement technique for low-frequency control processes • Electrically isolated PWM output for the kfi measuring value • Optocoupler output for signalling the device status • Automatic device self test • Certonal coating • Permanently set response value for the insulation resistance 23/46 kfi • Second response range 40/80 kfi selectable via jumper Insulation monitoring device for mobile generators Product description The ISOMETER®...

1 - Input for reset button "R" (N/O contact) 6- D igital output optocoupler "OK+": Alarm 2; Connect external operating voltage UB: max. +24 V 2 - Input for test button "T" (N/O contact) 7- P ulse-width-modulated output optocoupler "M+": measured value Connect external operating voltage UB: max. +24 V 3 - Common input for test and reset button "T/R" 4 - Connect the leads E and KE separately to PE 8 - Common reference point -UB "OK-, M-" for OK+ and M+ 5 - S upply voltage US = Un Connection to the IT system to be monitored 9 - Alarm relay "K1" 10 - Alarm relay "K2" Application example with overvoltage...

Insulation coordination acc. to IEC 60664-1 Rated insulation voltage 250 V Rated impulse voltage/pollution degree 2.5 kV/3 Protective separation (reinforced insulation) between: Optocoupler, alarm Optocoupler, measured value Uce 24 V, Ic 10 mA Uce < DC 24 V, Ic < 10 mA PWM signal, duty cycle 0 % = ^ kfi PWM signal, duty cycle 50 % = 120 kfi PWM signal, duty cycle 100 % = 0 kfi IT system being monitored Nominal system voltage Un AC 100.. .300 V Contact data acc. to IEC 60947-5-1: Rated operational voltage AC Utilisation category AC Rated operational current AC Rated operational voltage DC Utilisation...