Bender IR425-D4M1C-2

Bender IR425-D4M1C-2 Product Details

The Bender IR425 series ISOMETER® is an insulation monitoring device designed to monitor the insulation resistance of unearthed AC/DC control circuits (IT systems) with nominal voltages up to AC/DC 300 V. It is suitable for various applications requiring reliable insulation monitoring.  

Product Parameters

While specific parameters for the IR425-D4M1C-2 variant might require a direct datasheet, the general parameters for the IR425 series include:

• Nominal system voltage (Un): AC/DC 0...300 V

   

• Supply voltage (Us): Dependent on the specific variant (e.g., DC 9.6...94 V / AC 16...72 V or DC/AC 70...300 V)

• Frequency range: 15...460 Hz (for AC systems)

   

• Response value (Ran): Adjustable from 1...200 kΩ

• System leakage capacitance (Ce): ≤ 20 µF

• Alarm relays: Two separate alarm relays with one changeover contact each

   

• Display: Multi-functional LC display

   

• Enclosure: 2-module enclosure (36 mm width)

   

• Connection: Push-wire terminals (two terminals per connection)

   

Product Advantages

• Continuous Insulation Monitoring: Provides ongoing monitoring of insulation resistance in IT systems, enhancing safety and preventing unexpected downtimes.

   

• Early Fault Detection: Detects insulation faults at an early stage, allowing for proactive maintenance before critical failures occur.

• Suitable for AC/DC Systems: Can monitor both AC and DC unearthed systems up to 300 V.

   

• DC Fault Recognition: Distinguishes between insulation faults on the positive or negative conductor in DC systems.

• Two Adjustable Response Values: Allows for setting a pre-alarm and a main alarm, enabling staged warnings.

   

• Multi-functional LC Display: Clearly indicates the current insulation resistance and provides user-friendly access to settings and diagnostic information.

   

• Adjustable Response Delay: Prevents false alarms due to temporary insulation drops.

   

• Self-Monitoring: Automatic self-test function with alarm in case of internal faults.

• Connection Monitoring: Detects interruptions in the connection to the system or earth.

• Selectable N/O or N/C Operation: The alarm relays can be configured for normally open or normally closed operation, providing flexibility in alarm system integration.

   

• Selectable Fault Memory Behavior: The alarm relays can either latch upon a fault or automatically reset when the fault is cleared.

• Preset Function: Simplifies initial setup by automatically setting basic parameters based on the nominal system voltage.

   

• External Test/Reset Button: Option for remote testing and resetting of the device.

   

Precautions

• Installation by Qualified Personnel: Installation and maintenance should only be performed by qualified electricians in accordance with relevant safety regulations.

• Disconnect Power Before Servicing: Always disconnect all power from the system and the device before any servicing or wiring work.

• Observe Wiring Diagrams: Follow the specific wiring diagram provided in the product manual for correct connections.

• Fuse Protection: Ensure the external supply voltage is appropriately fused for device protection.

• Single Monitor per System: Only one Bender insulation monitor should be active and measuring in a single electrically connected system at any given time to avoid malfunctions or damage.

• System Leakage Capacitance: Ensure the system leakage capacitance does not exceed the specified limit (≤ 20 µF).

• Environmental Conditions: Operate the device within the specified environmental conditions (temperature, humidity, etc.) outlined in the datasheet.

• Proper Mounting: Mount the device securely using DIN rail or screw mounting with appropriate clips.