insulation monitoring device for unearthed AC control circuits (IT systems)

ISOMETER® IR420-D4 Insulation monitoring device for unearthed AC control circuits (IT systems) Device features • Insulation monitoring for IT control circuits AC 0...300 V • Two separately adjustable response values • Preset function (automatic setting of basic parameters) • Connection monitoring system/earth • LEDs: Power On, Alarm 1, Alarm 2 • Internal/external test/reset button • Two separate alarm relays (one changeover contact each) • Fault memory behaviour, selectable • Self monitoring with automatic alarm • Adjustable response delay • RoHS compliant • Push-wire terminal (two terminals...

Operating elements Device front Wiring diagram

Technical data Rated insulation voltage 250 V Rated impulse voltage/pollution degree 4 kV/3 Protective separation (reinforced insulation) between Supply voltage Supply voltage Us Frequency range Us IR420-D4-2: Supply voltage Us Frequency range Us Power consumption Switching elements Number of switching elements Operating principle Electrical service life, number of cycles Contact data acc. to IEC 60947-5-1 Utilisation category Rated operational voltage Rated operational current Minimum contact rating 2 (changeover contact K1, K2) N/C / N/O operation (N/O operation)* 10000 IT system being monitored...

Ordering information

Bender GmbH & Co. KG Londorfer Straße 65 35305 Grünberg Germany Tel.: +49 6401 807-0 [email protected] www.bender.de © Bender GmbH & Co. KG, Germany Subject to change! The specified standards take into account the edition valid until 07.2024 unless otherwise indicated.