Upgrade Your EV Charging System Confirming To IEC61851-1:2017 With DC6 Series Of RDC-MD

According to IEC 61851-1:2017 (Electric vehicle conductive charging system – Part 1: General requirements, Section 8.5), residual current protection for Mode-3 charging must utilize one of the following measures:

• Option 1: RCD Type B

• Option 2: RCD Type A combined with appropriate equipment that ensures disconnection of the supply in the event of a DC fault current exceeding 6mA.

Advantages of the Type-A RCD + RDC-DD Approach

When the DC protection equipment is designed correctly, Option 2 offers significant advantages over using a standalone Type-B RCD:

• Cost-Effectiveness: It is generally a more economical solution for EV charger manufacturers.

• Enhanced Safety: Explicitly detecting insulation faults in the Power Factor Corrector (PFC) ensures superior protection for EV users.

• Smart Integration: Adding smart communication features reduces operational costs.

• High Reliability: Proven stability even in challenging environmental conditions.

The Role of IEC 62955:2018 in EV Safety

Before 2018, a specific product standard for residual direct current protection devices was lacking. The publication of IEC 62955:2018 (Residual direct current detecting device (RDC-DD) to be used for Mode 3 charging of electric vehicles) resolved this.

This standard acts as a finely calibrated benchmark for designing and testing DC fault current protection devices (>6mA), fundamentally raising the safety bar for EV charging infrastructure.

Bituo's TÜV-Certified RDC-MD Solution

Bituo provides an optimal, compliant solution for Option 2:

• Customers select a standard Type-A RCBO/RCCB from reputable brands (e.g., ABB, Siemens).

• Customers integrate Bituo's RDC-MD Detection Module (iRCS or BRCS-01), or the complete RDC-MD set (Detection Module + Monitoring Module). This setup guarantees supply disconnection if a DC fault current exceeds 6mA.

Our solution is engineered for safety, cost-efficiency, and reliability. Importantly, both our monitoring modules (DC6-C1/C2) and detection modules (iRCS-32, BRCS-01) are certified by TÜV Rheinland for their exceptional performance in handling residual direct current.

Customer Benefits & Product Highlights

Key Customer Benefits:

• Upgrade AC charging systems to fully comply with the latest IEC standards.

• Enhance safety with TÜV Rheinland-certified components.

• Achieve significant cost savings by combining our RDC-MD with standard Type-A RCDs.

• Improve operational convenience with remote test and reset capabilities.

Product Highlights:

• Globally, the first RDC-DD certified by TÜV Rheinland.

• Explicit DC residual current detection with complete separation from AC residual current.

• Fast response times, facilitating a broader selection of main-circuit switching devices.

• Easy pre-charge testing before every charging cycle.

• Sensor cable connection monitoring to eliminate installation risks.

• Remote resetting capabilities to minimize on-site service calls.

For more information about our RDC-DD founded here