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IR420-D4

BENDER
Part Number IR420-D4
Manufacturer BENDER
Description Digital Ground Fault Monitor / Ground Detector Ungrounded (Floating) AC Systems
Published Sep 12, 2014
Detailed Description 1 IR420-D4 Series Digital Ground Fault Monitor / Ground Detector Ungrounded (Floating) AC Systems Technical Bulletin N...
Datasheet PDF File IR420-D4 PDF File

IR420-D4
IR420-D4

Overview
1 IR420-D4 Series Digital Ground Fault Monitor / Ground Detector Ungrounded (Floating) AC Systems Technical Bulletin NAE1012090 / 04.
2011 BENDER Inc.
• 700 Fox Chase, Coatesville PA 19320 • Ph: 800-356-4266 / 610-383-9200 • Fax: 610-383-7100 A-ISOMETER® IR420-D4 Ground Fault Monitor / Ground Fault Relay for Ungrounded AC Systems less than 300 V Product description The A-ISOMETER® IR420-D4 monitors for ground faults in ungrounded AC systems from 0 to 300 V by measuring the system's insulation resistance.
The IR420-D4 is designed to provide predictive maintenence and detect ground faults in ungrounded systems before leakage current may even be present.
An external supply voltage is required to power the device.
Application • General purpose industrial use in AC/DC control circuits • Ungrounded systems at 300 V or less A-ISOMETER® IR420 Function When the insulation resistance from system to ground falls below the set response value, the alarm relays switch and the alarm LEDs activate.
Two separately adjustable alarm contacts can be set to a prewarning and main warning alarm.
The measured value is indicated on the LCD display.
A fault storage setting allows the device to either latch or automatically reset.
TEST and RESET may be activated on the device or via a remote connection.
The IR420-D4 continuously monitors the equipment ground connection to ensure proper operation.
The device's easy-to-use onboard menu manages all settings via the detailed LCD display.
Preset function The IR425 provides a preset function which, when first started up, will set response value alarms based on initial readings.
Measuring principle The A-ISOMETER® IR420-D4 uses a superimposed DC voltage measuring principle.
Device features • Insulation monitoring for ungrounded, low-voltage circuits AC 0…300 V • Two separately adjustable response values •  Preset function (automatic assignment of basic parameters) • Connection monitoring • LEDs: Power On, Alarm 1, Alarm 2 • Inte...


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