The BENDER EDS460-D-2 is a high-performance, digital insulation fault locator designed for use in unearthed AC, AC/DC, and DC systems (IT systems). This device works in conjunction with an insulation fault test device (PGH series) or an insulation monitoring device (ISOMETER) to automatically pinpoint the exact location of insulation faults in complex electrical networks without disconnecting the power supply.

 

Product Overview

The EDS460-D-2 is a multi-channel evaluator capable of monitoring up to 12 measuring current transformers simultaneously. When a ground fault is detected in the IT system, the master device injects a test current. The EDS460-D-2 then scans its connected channels to identify which specific branch circuit contains the fault, significantly reducing troubleshooting time and increasing system availability in critical infrastructure.

 

Technical Specifications (Datasheet)

 

Key Technical Features

• Automatic Fault Location: Eliminates the need for manual “trial and error” circuit isolation by identifying the faulty branch while the system is online.
• Multi-Channel Monitoring: A single EDS460-D-2 can monitor 12 separate circuits; multiple units can be networked via BMS bus to monitor hundreds of branches.
• Sensitivity Adjustment: Features adjustable response values to compensate for natural system leakage capacitance, preventing nuisance tripping.
• Digital Interface: The backlit display shows real-time leakage current per channel, and the RS-485 interface allows for remote monitoring via a central control system.

Country of Origin

Country of Origin: Germany (Bender GmbH & Co. KG)

 

Primary Application Fields

The Bender EDS460-D-2 is a vital safety component in:

• Medical Facilities: Group 2 medical locations (Operating theaters, Intensive Care Units).
• Industrial Plants: Continuous manufacturing lines where a sudden shutdown is costly.
• Data Centers: Ensuring power continuity for server racks and UPS systems.
• Marine & Offshore: Shipboard electrical systems and oil rig power distribution.
• Railway Technology: Signaling and power supply systems for rolling stock.

 

Operating Instructions

1. Installation: Snap the device onto a 35mm DIN rail. Ensure the measuring current transformers (CTs) are installed around all live conductors (L1, L2, L3, and N if applicable) of the branch being monitored.
2. Addressing: If using multiple units, set the unique BMS bus address via the front-panel menu to ensure correct data reporting to the master controller.
3. Wiring: Connect the CTs to the 12 input terminals. Wire the RS-485 BMS bus using shielded twisted-pair cable, ensuring the 120-ohm termination resistor is active if it is the last device in the chain.
4. Commissioning: Perform a “Test” function via the master insulation monitor to verify that the EDS460-D-2 correctly picks up the test pulse and identifies the simulated fault channel.
5. Maintenance: Regularly check the historical fault memory in the device to identify intermittent insulation issues before they lead to a full system failure.