The EDS460-D-1 is an insulation fault locator designed for unearthed systems (IT systems) to automatically locate insulation faults. It works together with an ISOMETER® insulation monitoring device (e.g., IRDH575) or a PGH series locating current injector: when the ISOMETER® detects an insulation fault and generates a locating current signal, the EDS460-D-1 detects this signal via measuring current transformers installed on each branch circuit, thereby precisely identifying the faulty circuit without interrupting the power supply.
This model is the D version, featuring a graphical LCD display with integrated control and display functions. It has 12 measuring channels with independent alarm contacts per channel. The -1 suffix indicates a low‑voltage power supply: DC 16…94 V / AC 16…72 V, 42…460 Hz.
Technical Specifications
· Order No.: B 9108 0001
· Supply voltage (Uₛ): DC 16…94 V / AC 16…72 V, 42…460 Hz
· Response sensitivity: 2…10 mA (adjustable)
· Scanning time: ≤ 10 s (all channels scanned in parallel, up to 1080 channels)
· Display: Graphical LCD display
· Alarm outputs:
· 2 common alarm relays (each with 1 changeover contact)
· 12 independent channel alarm contacts (12 × 1 N/O contact)
· History memory: 300 event records with date and time stamp
· Communication interface: RS‑485, supports BMS protocol
· BMS address range: 1…90
· CT connection monitoring: Continuously monitors external current transformer connection status
· Fault memory: Selectable latching/non‑latching mode
· Operating principle: Relays configurable for N/O or N/C operation
· External test/reset: Supports connection of external test and reset push‑buttons
· Mounting: DIN rail mounting
· Protection class: Internal components IP30, terminals IP20
Key Features
· 12 independent measuring channels: Connects 12 measuring current transformers (CTAC, WR, WS series) per device, each channel with its own alarm contact for precise fault location
· Parallel scanning technology: All channels scanned simultaneously, complete detection in as little as 10 seconds, expandable up to 1080 measuring channels
· Adjustable sensitivity: Response value adjustable from 2…10 mA to adapt to system leakage capacitance, suitable for main circuits and control circuits
· D version design: Features graphical LCD display with integrated control and display functions for on‑device status viewing and parameter configuration
· High scalability: Up to 90 EDS devices can be connected via the BMS bus, expanding to 1080 measuring channels
· History memory: Built‑in storage for 300 time‑stamped event records
· Continuous CT connection monitoring: Continuously monitors external current transformer connections; alarms immediately on wire break
· Fault memory: Selectable latching mode keeps alarm status until manual reset
· External test/reset: Supports connection of external test and reset push‑buttons
· Alarm output configuration: Common alarm relays configurable for N/O or N/C operation
Typical Applications
· Industrial IT systems: Insulation fault location in unearthed systems with frequency converters, rectifiers and other power electronic loads
· Medical locations: Insulation fault location in IT systems (isolated power systems) for operating theatres, ICUs, etc.
· Data centres: Ensuring reliable power supply for server racks and UPS systems, quickly locating earth faults
· Marine and offshore: Insulation fault location on shipboard power systems and offshore platform distribution systems
· Power plants: Insulation fault location in auxiliary systems and diode‑decoupled DC IT systems
· Photovoltaic systems: Insulation fault location on the DC side of large‑scale PV plants
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