Bender offers a variety of electrical safety relay solutions for EV charging stations. Our components are designed to be integrated with the electric vehicle safety equipment's (EVSE) electronic controls. Here, they ensure that electrical isolation hazards or dangerous milliamp currents cannot harm personnel or the EVSE itself. They are designed to sense and then alert at predetermined thresholds. As follows, power will always be interrupted before the situation becomes worse. The following paragraphs describe the individual solutions we carry for level 1, level 2, and DC fast charging stations. Since there are various charging solutions available, different safety circuits may apply, and we have compiled the information below to address each scenario. Bender’s ground fault protection and IMD EV technology ensure that electric vehicle charging stations are continuously monitored for insulation faults, safeguarding both the vehicle and charging infrastructure.
Level 1 AC charging allows the user to charge their vehicle with a standard outlet at home, but also requires a special charging cable. This charging cable must have an integrated monitoring system capable of triggering a 6 mA ground fault. These are known as charge current interrupting devices or CCID5. Bender offers ground-fault monitoring sensors for level 1 charging cable manufacturers (level 1 GFCI). These CCID sensors can be used in EVSE cords in accordance with UL 2231, which has several Bender-listed devices. Bender’s insulation monitoring devices, combined with advanced ground fault protection, offer comprehensive safety across all charging levels, from Level 1 AC to DC fast charging stations.
Level 2 EVSE (electric vehicle supply equipment) can be found at homes, in hotels, or at the workplace. The required infrastructure for these charge ports is relatively simple and usually requires only a 120V or 240V connection. Bender's RCMB level 2 ground fault sensing devices monitor circuits effectively for fault currents that can pose hazards to personnel and equipment. These leakage devices are listed to UL2231 and fulfill all the stringent safety requirements. They will trigger at either 5 or 20mA of potential hazard current and interrupt the EVSE.
DC charging allows vehicles to be charged quickly at significantly higher powers. A DC charging station, also called a fast charging station, is usually set up as an ungrounded power supply system, which must be monitored by an insulation monitoring device as specified by the standards. By integrating IMD EV and line isolation monitors, Bender provides complete safety monitoring for DC fast charging stations, preventing insulation failures and isolating electrical faults. In DC charging, a distinction is made between two common charging standards. In addition to the CCS standard (Combined Charging System) used in US and Europe, the Japanese charging standard CHAdeMO is also used for some vehicles from Asian manufacturers.
The new insulation monitoring device ISOMETER® isoCHA425HV with AGH420 supports both charging standards equally. With this combination unit, Bender has now responded to the demands of the market. It allows switching online between CCS and CHAdeMO via a galvanically isolated Modbus RTU interface. The individual parameters for the respective standard are pre-programmed and can be selected automatically. The device is designed for nominal voltages of up to 1,000V and thus already takes into account the increasing battery and charging voltages. Bender’s ground fault protection and line isolation monitors offer enhanced safety for electric vehicle supply equipment, ensuring that charging systems remain operational and hazard-free.
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| Electrical Safety for EV/EVSE | Market Segment Brochures | 3.4 MB | EN | 2024/01/1515.01.2024 | |
| 2020 Guidelines (US) | Technical Information | 1.9 MB | EN | 2020/06/1515.06.2020 | |
| Overview Brochure | Product Overviews | 10.3 MB | EN | 2023/10/0202.10.2023 | |
| Charging Electric Vehicles - Protection Against Electric Shock by DC Fault Current Sensor Units | Technical Article | 931.2 KB | EN | 2019/05/1313.05.2019 | |
| Bender Industry Applications | Market Segment Brochures | 5.9 MB | EN | 2024/09/0404.09.2024 |
Products
Ground-fault monitoring device for ungrounded DC drive systems in electric vehicles
Insulation monitoring device for unearthed DC systems (IT systems) DC 0 V to 400 V. Suitable for DC charging stations according to CCS or CHAdeMO
Insulation monitoring device with coupling device for unearthed DC systems (IT systems) DC 0 V to 1000 V Suitable for DC charging stations according to CCS or CHAdeMO
AC/DC sensitive residual current monitoring module for electric vehicle charging systems
AC/DC sensitive residual current monitoring for AC charge stations
Ground-fault monitoring device for ungrounded DC drive systems in electric vehicles
Insulation monitoring device for unearthed DC systems (IT systems) DC 0 V to 400 V. Suitable for DC charging stations according to CCS or CHAdeMO
Insulation monitoring device with coupling device for unearthed DC systems (IT systems) DC 0 V to 1000 V Suitable for DC charging stations according to CCS or CHAdeMO
AC/DC sensitive residual current monitoring module for electric vehicle charging systems
AC/DC sensitive residual current monitoring for AC charge stations
In-Cable Control and Protection Device for mode 2 charging of electric road vehicles (IC-CPD)
Electric vehicle conductive charging system - Part 1: General requirements
Electric vehicle conductive charging system - Part 23: DC electric vehicle charging station
Ladeleitungsintegrierte Steuer- und Schutzeinrichtung für die Ladebetriebsart 2 von Elektro-Straßenfahrzeugen (IC-CPD)
