Isolation Control for electric vehicles

Description

The IMD-300-EV is an advanced insulation resistance monitoring relay designed to ensure safety and service continuity at electric vehicle (EV) fast charging points operating in IT isolated systems.

• Continuous insulation monitoring: Detects insulation faults in real time, reducing risks and ensuring uninterrupted service at the fast charging station. The device measures key parameters such as:

• Compatibility with CCS and CHAdeMO systems: Specifically designed for charging stations operating under the main fast-charging standards, ensuring easy and safe integration.

• Electric vehicle protection: Minimises the risk of electrical faults that could compromise the safety of the vehicle connected to the charger.
• Easy installation and maintenance: The device features an RS-485 port (Modbus RTU) for communication with the charging station’s control units.
• Insulation fault detection and response: The device includes a negative LCD display showing the relay status and has three output relays. These relays can be configured in NO/NC logic, with customisable start-up, response, and release delays to suit specific application needs. 
  • Relay 1: Trip in case of insulation loss.
  • Relay 2: Alarm for electrical parameters out of range.
  • Relay 3: Performs a test trip to verify proper operation in accordance with applicable standards.

• Regulatory compliance: Complies with IEC 61557-8 product standard for fast charging stations, ensuring peace of mind for both operators and users.

Applications

It is installed specifically in fast-charging infrastructure using Combo CCS or CHAdeMO systems (DC charging) to continuously monitor the insulation of the DC bus. This proactive monitoring enables early detection of insulation faults, a critical issue that can compromise both the safe operation of the charging station and the integrity of the electric vehicle. With the IMD-300-EV, safe charging and uninterrupted operation of the station are ensured, maximising service availability. The IMD-300-EV is designed in accordance with IEC 61851-23, Mode 4, for standard or combined (CCS) or CHAdeMO charging systems.

Mechanical characteristics

DC power supply

Digital relay outputs

Communication Network

User interface

Environmental characteristics

Measurement circuit with insulation monitoring

PE connection fault measurement

Standards