Bender EDS460-D-1

Description

Product Brief Introduction

Bender EDS460-D-1 is a DIN rail-mounted insulation fault location device exclusively designed for ungrounded IT power distribution systems (AC, DC, AC/DC mixed circuits). It cooperates with external toroidal current transformers to precisely locate single-point insulation degradation faults on distribution branches, continuously monitoring insulation resistance leakage current and output visual fault indication, relay alarm signals, and digital bus diagnostic data for shipboard power, medical location power stations, industrial DC drive systems, and battery energy storage IT networks, complying with IEC 61557-8 insulation monitoring safety standards.

Core Technical Specifications

1. Power Supply Operating Band
   • Rated Input Range: DC 16 V ~ 94 V / AC 16 V ~ 72 V, Frequency Band 42 Hz ~ 460 Hz
2. Fault Detection Sensitivity
   • Response Threshold Leakage Current: 2 mA ~ 10 mA Software Adjustable
3. Measurement Channel Capacity
   • Supported Toroidal Transformer Input Channels: 12 Independent Branch Monitoring Inputs
   • Maximum Network Expandability: Up to 90 EDS460-D units interconnected via BMS bus, total 1080 monitoring measurement channels
   • Full Network Scan Completion Time: Maximum 10 Seconds Parallel Channel Query
4. Alarm & Signal Output
   • Independent Alarm Relay Count: 2 Changeover Contact Relays, Selectable Energized/De-energized alarm state
   • External Test/Reset Input Terminal for remote manual fault acknowledgment
   • RS-485 BMS Communication Bus for digital fault data upload to upper monitoring systems
5. Data Storage
   • Onboard Event Memory Capacity: Stores 300 timestamped insulation fault and system diagnostic events
6. Mechanical & Environmental
   • Mounting Standard: IEC 60715 35 mm DIN Rail
   • Operating Ambient Temperature: -20 °C ~ +60 °C
   • Storage Temperature Range: -40 °C ~ +85 °C
   • Protection Grade: IP20 module housing, install inside IP40+ control cabinet

Function Characteristics

1. Multi-branch parallel insulation fault scanning function, accurately pinpointing which distribution branch contains degraded insulation leakage faults without circuit sectional isolation
2. Continuous real-time supervision of all connected toroidal transformers, generating fault alarm upon transformer disconnection or open-circuit wiring failure
3. Adjustable leakage current response threshold adapts to IT systems of varying power capacity and inherent baseline leakage capacitance
4. Dual independent alarm relay contacts support separate pre-warning low insulation resistance and critical fault interlock signal output
5. Graphical front-panel LCD display shows real-time insulation resistance values, fault branch number, and historical fault event timestamps
6. BMS serial bus network architecture realizes centralized multi-panel insulation fault monitoring for large-scale ship, hospital, and industrial IT power distribution systems
7. Manual test input terminal verifies complete fault detection circuit functionality via external remote push-button operation

Performance Advantages Highlights

1. Unique parallel multi-channel scanning technology eliminates sequential branch test delay, achieving full network fault location within maximum 10 seconds
2. Wide universal AC/DC mixed power supply input range compatible with marine vessel battery DC systems and industrial variable-frequency AC IT networks
3. Expandable bus network architecture supports large-scale multi-panel distributed IT power system centralized monitoring without additional master control hardware
4. Complete historical fault event logging with timestamp provides long-term insulation degradation trend analysis for predictive maintenance scheduling
5. Fully compliant with medical location IT power safety standards (IEC 60364-7-710) for hospital isolated patient treatment power distribution networks

Material Composition & Structural Features

1. Enclosure Material: Yellow industrial flame-retardant PA66 plastic housing, standard Bender safety monitoring equipment color identification
2. Internal PCB: Multi-layer FR4 circuit board with analog leakage current sampling circuits isolated from digital communication logic
3. Input Signal Interfaces: Screw-clamp terminals for toroidal transformer low-current signal wiring, surge suppression protection circuits integrated per channel
4. Display Assembly: Monochrome backlit LCD graphical screen with physical navigation push-buttons on front panel
5. DIN Rail Retention: Dual spring plastic latches for vibration-resistant mounting on marine vessel and industrial cabinet DIN rails

Working Principle

The paired IRDH series insulation monitoring device superimposes a low-amplitude test measuring voltage across the ungrounded IT power system. When insulation degradation creates leakage current flow to protective earth, toroidal current transformers installed on each distribution branch capture the fault leakage current vector signal and transmit analog measurement values to EDS460-D-1 input channels. Internal multi-channel signal sampling circuits compare measured leakage current magnitude against user-configured 2–10 mA threshold values; any branch exceeding threshold triggers LCD fault branch number display, relay alarm contact actuation, and timestamped event storage to onboard memory. All fault diagnostic data transmits via RS-485 BMS bus to central monitoring SCADA systems for remote alarm notification and historical trend recording.