BENDER ISOEV425-D4-4

BENDER ISOEV425-D4-4 Product Details

The BENDER ISOEV425-D4-4 is an insulation monitoring device designed for unearthed DC circuits (IT systems) in electric vehicle charging stations (Mode 4 according to IEC 61851-23/FDIS). It is used in systems with nominal DC voltages from 0 to 1000 V. This device, always operated with the AGH420 coupling device, monitors the insulation resistance to ensure the safety and reliability of the charging process. It can also monitor de-energized systems when a separate supply voltage is connected.

Product Parameters

Here are some key technical parameters of the BENDER ISOEV425-D4-4:

• Nominal System Voltage (Un): DC 0...1000 V

• Supply Voltage (Us): AC 100...240 V / DC 24...240 V

• Frequency Range (Us): 47...63 Hz

• Permissible System Leakage Capacitance (Ce): ≤ 5 μF

• Response Value (Ran1): 2...500 kΩ (factory setting: 500 kΩ)

• Response Value (Ran2): 1...490 kΩ (factory setting: 100 kΩ)

• Response Time (tan at RF = 0.5 x Ran and Ce=1 μF): ≤ 10 s

• Start-up Delay (t): 0...10 s (factory setting: 0 s)

• Response Delay (ton): 0...99 s (factory setting: 0 s)

• Display: LC display, multi-functional

• Interface: RS-485 (BMS, Modbus RTU, isoData)

• Switching Elements: 2 x 1 N/O contacts, common terminal 11 (configurable as N/C)

• Operating Temperature: -40...+70 °C

• Protection Class: IP30 (device front), IP20 (terminals)

• Dimensions: 2 modules (36 mm width)

Product Advantages

The BENDER ISOEV425-D4-4 offers several advantages:

• Specifically designed for EV charging: Optimized for the requirements of unearthed DC charging stations (Mode 4).

• Wide voltage range: Suitable for DC systems up to 1000 V.

• Early fault detection: Continuous monitoring of insulation resistance helps detect faults at an early stage, preventing potential hazards and downtime.

• Predictive maintenance: The galvanically separated interface allows for continuous data output (isoData), enabling predictive maintenance strategies.

• Automatic adaptation: Automatically adjusts to the system leakage capacitance up to 5 μF.

• Self-testing: Automatic device self-test with connection monitoring ensures reliable operation.

• Adjustable parameters: Features selectable start-up delay, response delay, and two separately adjustable response value ranges.

• Alarm signaling: Clear alarm indication via LEDs and two separate alarm relays.

• Versatile communication: Equipped with an RS-485 interface supporting BMS, Modbus RTU, and isoData protocols for easy integration into control and monitoring systems.

• User-friendly interface: Multi-functional LC display for easy reading of measured values and configuration.

• Password protection: Prevents unauthorized parameter changes.