isoEV425HC-D4-4+AGH420 BENDER Insulation Monitor

Description

isoEV425HC-D4-4+AGH420 BENDER Insulation Monitor

Product Dimensions：

Product Description (Detailed Explanation)

This system consists of two primary components working in tandem:

1. isoEV425HC-D4-4 (Monitor): The intelligent evaluation unit that measures the insulation resistance ($R_F$). The “HC” (High Capacitance) version is specifically optimized to handle systems with high leakage capacitance (up to $25 \mu F$), which is common in long liquid-cooled charging cables or large vehicle battery filters.

2. AGH420 (Coupling Device): An external high-voltage adapter that extends the measurement range of the monitor, allowing it to be safely connected to DC systems with nominal voltages up to 1000 V DC.

Together, they provide continuous, real-time monitoring and trigger an alarm if the insulation resistance drops below a safety threshold (e.g., due to cable damage or moisture ingress), preventing hazardous electric shocks.

Product Parameters (Technical Specifications)

Product Advantages (Key Benefits)

• High Capacitance Stability: The “HC” technology ensures the monitor does not produce “nuisance trips” or false alarms even when connected to vehicles with large Y-capacitors or during high-power charging transitions.

• 1000V DC Capability: The AGH420 coupling allows for safe monitoring of the latest generation of ultra-fast chargers (High Power Charging – HPC) that operate at 800V-1000V.

• Fast Response Time: Provides rapid detection of insulation faults (typically $\le 10$ seconds even with high capacitance), ensuring user safety during the charging process.

• Compact Footprint: At only 2 modular widths (72mm total), it saves significant space in the dense power electronics cabinets of a charging station.

• Integrated Self-Test: Automatically performs a functional test of the measuring circuit and the connection to the earth (PE) every 24 hours.

Precautions (Important Notes)

• Coupling Connection: The AGH420 must be connected to the DC+ and DC- lines using high-voltage rated wiring. Never connect the isoEV425HC directly to 1000V without the AGH420.

• Earthing (PE) Integrity: The accuracy of the measurement depends entirely on a low-impedance connection to the Protective Earth. Ensure terminal $KE$ and $E$ are wired to the same potential as the station’s main grounding bus.

• Dielectric Testing: Before performing high-voltage dielectric tests on the charging station, the monitoring system must be disconnected to avoid damaging the sensitive measurement input.

• Modbus Termination: If using RS-485 for remote monitoring, ensure a $120 \Omega$ termination resistor is placed at the end of the bus line to prevent data corruption.

Product Applications (Typical Use Cases)

• DC Fast Chargers (Level 3): Standard monitoring for public charging stations to comply with IEC 61851-23 and DIN EN 61557-8.

• High Power Charging (HPC): Specifically required for 350kW+ chargers that utilize liquid-cooled cables where leakage capacitance is inherently higher.

• Electric Vehicle Test Benches: Monitoring the insulation of high-voltage battery packs during stress tests in R&D laboratories.

• Energy Storage Systems (ESS): Detecting insulation faults in large-scale battery containers used for grid stabilization.

• DC Microgrids: Protecting the DC distribution network in industrial facilities or research campuses.

Shipping Port: Xiamen, China

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