BENDER EDS440-L-4 Insulation Fault Locator

Description

BENDER EDS440-L-4 Insulation Fault Locator

Product Dimensions：

The Bender EDS440-L-4 is a high-performance Insulation Fault Evaluator used in conjunction with an Insulation Monitoring Device (IMD) and a search current generator. It is a core component of the Bender EDS (Earth Fault Detection System), designed for unearthed (IT systems) power supplies to automatically locate insulation faults without shutting down the system.

Product Detailed Description

The EDS440-L-4 is a modular device that monitors up to 12 channels (via external measuring current transformers). When an insulation fault occurs in an IT system, the central IMD triggers a test current. The EDS440-L-4 “listens” for this specific signal through the CTs connected to individual outgoing feeders. Once it identifies the faulted branch, it alerts the operator, drastically reducing the time needed for manual troubleshooting.

Technical Parameters

Product Advantages

• Increased System Availability: Since it works on IT systems, it identifies the fault location while the plant is still running, preventing unplanned downtime.
• Rapid Fault Location: Automatically pinpoints the exact circuit with the insulation leak, eliminating the “trial and error” method of switching off feeders one by one.
• High Scalability: Multiple EDS440 units can be connected via the BMS bus to monitor hundreds of feeders in a large-scale installation.
• Precise Detection: Features advanced filtering and digital signal processing to avoid false alarms caused by system leakage capacitances (C_e).
• User-Friendly Interface: Clear LED indicators for “Power,” “Alarm,” and “Connection Fault” provide immediate status updates.

Important Considerations (Precautions)

• CT Selection: Only use specific Bender measuring current transformers (e.g., CTAC or W series). Incorrect CT ratios will lead to inaccurate readings or failure to detect faults.
• BMS Bus Termination: Ensure that the RS-485 (BMS) bus is properly terminated at both ends with a 120 \Omega resistor to prevent data corruption.
• Sensitivity Settings: The response value should be set higher than the inherent leakage current of the specific feeder to prevent nuisance tripping.
• System Type: This device is strictly for unearthed (IT) systems. It will not function in earthed (TN/TT) systems where fault currents are high and trip standard breakers.

Product Applications

The Bender EDS440-L-4 is essential in “mission-critical” environments where power continuity is vital:

• Hospitals & Medical Facilities: Monitoring Group 2 medical locations (Operating theaters, ICUs) where power must stay on even during a first fault.
• Industrial Manufacturing: Continuous process lines (glass, chemicals, automotive) where a sudden shutdown causes massive financial loss.
• Data Centers: Ensuring the integrity of the power supply to servers and cooling systems.
• Maritime & Offshore: Monitoring electrical networks on ships and oil platforms.
• Railways: Signalling and control systems where safety and uptime are non-negotiable.

Shipping Port: Xiamen, 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

Please make an inquiry for more models：