AC Type Circuit Breaker with Residual Current Operation

Meet global safety standards with the CDADA DAM1L AC Type Circuit Breaker with Residual Current Operation a high-integrity earth leakage MCCB engineered by Shanghai DADA Electric CO., LTD. for reliable protection against sinusoidal AC ground faults only (per IEC 60755).

Designed as a 4P moulded case breaker rated 10A to 500A at 400V/415V, it integrates overload, short-circuit, and residual current protection in one compact unit. Certified to CE, CB, and SEMKO, the DAM1L is ideal for applications where pure AC leakage detection is sufficient such as standard residential wiring, lighting circuits, or motor loads without electronic drives.

With adjustable I△n (30mA–1000mA), multi-phase powered electronics (operational down to 50V), and robust arc separation, it delivers fail-safe performance in buildings, tunnels, and infrastructure—while complying strictly with AC-type RCD requirements.

Key Specifications

Key Features:

★ Multi-phase powered RCD circuit → works at ≥50V

★ Push-to-test button

★ Separate main & arcing contacts

★ Adjustable magnetic trip (0.8–1.0×In)

★ Strong EMI immunity

★ Full accessory support (shunt trip, aux contacts, rotary handle)

Why Choose CDADA AC TYPE CBR?

★ True AC-Type Compliance

Unlike “universal” A-type devices, CDADA’s AC-type CBR is optimized only for sinusoidal AC leakage—offering higher cost efficiency where electronic loads (e.g., VFDs, SMPS) are absent.

★ Fail-Safe Power Design

The RCD electronics draw power from all phases, ensuring operation even during single-phase loss or severe undervoltage—a critical advantage over single-phase-powered competitors.

★ Dual Safety Roles

● 30mA: Meets IEC for personal shock protection

● 100mA–1000mA: Prevents insulation-failure fires in cables and junction boxes

★ Field-Adjustable Protection

Tune sensitivity and time delay to match installation conditions—avoiding nuisance trips while maintaining code compliance.

★ Industrial-Grade Integration

Combines MCCB and RCD in one sealed unit—saving space, reducing wiring errors, and ensuring perfect coordination.

★ Globally Accepted

With CE, CB, and SEMKO, it’s approved for use across Europe, the Middle East, Africa, and Asia—ideal for export-oriented panel builders.

★ Our products have been supplied for power grid projects, industrial plants, commercial buildings, and infrastructure projects in many countries.

★ We invest continuously in R&D, monitor global standards and market trends, and collaborate with industry experts to upgrade our product portfolio.

Typical Applications

Residential Buildings: Main panels or sub-circuits (lighting, sockets) without electronics

Commercial Lighting: Office ceiling circuits, corridor lights

Traditional Motor Loads: Pumps, fans, compressors (non-VFD driven)

Infrastructure: Tunnel lighting, street cabinets, elevator machine rooms

Cost-Sensitive Projects: Where A-type RCDs are unnecessary and over-specified

FAQ

Q1: What does “AC TYPE” mean for a residual current device?

A1: AC TYPE CBRs respond only to smooth, sinusoidal alternating residual currents (e.g., from damaged insulation in heaters or motors). They do not detect pulsating DC from electronics like phone chargers or LED drivers. Use A-type if such loads are present.

Q2: Can I use this AC CBR 63A for a home socket circuit?

A2: Only if the circuit has no electronic devices (e.g., pure resistive loads like incandescent lamps or old-style kettles). For modern homes with TVs, laptops, or LED lights, choose an A-type RCD instead.

Q3: Why would I choose AC-type over A-type?

A3: Lower cost and higher immunity to false tripping in purely AC environments. If your system has no rectifiers, inverters, or switch-mode power supplies, AC-type is sufficient and more economical.

Q4: Does it work if one phase fails?

A4: Yes! The RCD circuit is powered by multi-phase supply, so it remains active even during phase loss or voltage drop to 50V—ensuring continuous leakage protection.

Q5: Why choose CDADA for AC Type Circuit Breaker with Residual Current Operation?

A5: CDADA offers:

● True IEC 60755-compliant AC-type design

● Integrated MCCB + RCD in one unit (no compatibility issues)

● Multi-phase powered electronics for reliability

● On-site adjustability of I△n and time delay

● Global certifications (CE/CB/SEMKO) with OEM-friendly pricing