IR425-D4M1C-2 BENDER

IR425-D4M1C-2 BENDER Power module

Product  Description：

The IR425-D4M1C-2 is a compact, DIN-rail mounted device that operates on the active measuring principle. Unlike passive monitoring systems, it can detect symmetrical and asymmetrical insulation faults, even in systems containing high-frequency components or pure DC voltages. This specific model features a clear digital display for real-time resistance values and simplifies the troubleshooting process by providing precise fault information. It is commonly integrated into medical facilities, industrial automation lines, and small-scale power distribution systems where continuous power availability is paramount.

Product Parameters

The technical specifications of the IR425-D4M1C-2 ensure it meets the rigorous demands of modern electrical environments.

• Nominal System Voltage: It can monitor systems ranging from $0 \text{ to } 300 \text{ VAC}$ ($0 \text{ to } 460 \text{ Hz}$) or $0 \text{ to } 300 \text{ VDC}$.

• Supply Voltage: The device requires an auxiliary supply voltage, typically $AC 100 \text{ to } 240 \text{ V}$ or $DC 100 \text{ to } 240 \text{ V}$, making it versatile for global power standards.

• Insulation Monitoring Range: The response value ($R_{an}$) is adjustable between $1 \text{ k}\Omega \text{ and } 200 \text{ k}\Omega$.

• System Leakage Capacitance: It is optimized for systems with a maximum leakage capacitance ($C_e$) of up to $20 \text{ }\mu\text{F}$.

• Alarm Contacts: Equipped with two separate alarm relays (SPDT/changeover contacts) which can be configured for N/O (normally open) or N/C (normally closed) operation.

• Display and Interface: Features a multi-functional LC display and a two-wire connection for remote reset and test functions.

• Protection Class: The enclosure is rated at IP30, while the terminals are rated at IP20 to prevent accidental contact.

Product Advantages

One of the primary advantages of the IR425-D4M1C-2 is its active measurement technology, which allows for accurate monitoring even when the system is de-energized. This ensures that a fault is detected before the equipment is even switched on. The device offers high selectivity, meaning it can distinguish between actual insulation degradation and temporary noise or capacitive surges. Its compact size (only $36 \text{ mm}$ wide) saves significant space in control cabinets. Furthermore, the integrated display eliminates the need for external meters to check the current insulation level, and the self-monitoring capability ensures that the device alerts the operator if its own internal circuitry or the connection to earth is compromised.

Important Considerations and Precautions

When installing or maintaining the IR425-D4M1C-2, several safety precautions must be observed. First, this device is only suitable for IT systems (ungrounded systems); it cannot be used in TN or TT (grounded) systems as it would immediately trigger a fault. It is critical to ensure that only one insulation monitoring device is connected to a single interconnected IT system, as multiple devices will interfere with each other's measurement signals.

Users must ensure the system leakage capacitance does not exceed the rated $20 \text{ }\mu\text{F}$, or the measurement accuracy and response time may be negatively affected. Before performing high-voltage insulation tests (dielectric strength tests) on the monitored system, the IR425-D4M1C-2 must be disconnected to prevent damage to its internal electronics. Finally, all settings for the alarm thresholds should be determined by a qualified electrical engineer based on the specific safety requirements of the facility.

Product Applications

The IR425-D4M1C-2 finds widespread use in sectors where "first fault" safety is a priority, meaning the system should keep running even if a single insulation fault occurs.

• Medical Facilities: Monitoring isolated power systems in Group 1 medical rooms to ensure patient safety and equipment reliability.

• Industrial Automation: Protecting sensitive control circuits and small motor drives where an unexpected shutdown would cause production loss.

• Mobile Power Supplies: Used in portable generators and emergency power units where grounding might be inconsistent or difficult to establish.

• Control Systems: Monitoring the DC control circuits in power plants and substations to prevent accidental tripping of breakers due to ground faults.

• Lighting Systems: Ensuring the safety of isolated lighting circuits in tunnels or public infrastructure.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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