Hager ADC970D Residual Current Circuit Breaker with Overcurrent Protection 2P 20A C 30mA Type AC

The Hager ADC970D is a professional-grade residual current circuit breaker with overcurrent protection (RCBO), engineered to provide comprehensive safety for electrical installations. This 2-pole device combines the functions of a miniature circuit breaker and a residual current device in a single compact unit, effectively monitoring electrical circuits for faults. It is designed to operate at a rated current of 20A with a C-type tripping characteristic, ensuring it handles standard residential and commercial loads while providing reliable protection against both overcurrent and earth leakage currents.

Advantages

This RCBO offers a significant space-saving advantage by integrating two essential protective functions into one modular component, which simplifies installation within distribution boards. The device is built to high manufacturing standards, ensuring consistent performance and long-term reliability in electrical systems. By detecting leakage currents of 30mA, it provides critical protection against electric shock, while the C-curve characteristic allows for the safe starting of inductive loads, such as motors or lighting circuits, without nuisance tripping.

Suitable for

• Residential electrical distribution boards
• Commercial office lighting and power circuits
• Protection of individual final circuits
• Systems requiring combined overload and earth leakage protection

When it may not be suitable

This device is designed for Type AC leakage currents and may not be appropriate for circuits containing electronic equipment that produces DC components or high-frequency leakage, where Type A or Type B devices might be required. It is also not intended for use in high-voltage industrial distribution networks exceeding its rated voltage specifications.

Key specifications

• Number of poles: 2P
• Rated current: 20A
• Tripping characteristic: C-type
• Sensitivity: 30mA
• Leakage current type: AC
• Rated voltage: 240 V

How to use

The Hager ADC970D must be installed by a qualified electrician in accordance with local electrical regulations. The device is designed for mounting onto a standard DIN rail within a consumer unit or distribution board. Ensure that the supply cables are securely connected to the input terminals and the load cables to the output terminals, maintaining correct polarity and torque settings as specified by the manufacturer. Once installed, the device should be tested using the integrated test button to verify the mechanical tripping function.

What to consider before purchase

• Verify that the 20A rating is appropriate for the specific circuit load
• Ensure the installation environment is compatible with Type AC protection requirements
• Check that the available space in the distribution board accommodates a 2-pole modular device
• Confirm that the C-type tripping curve matches the characteristics of the connected appliances

Usage recommendations

Regularly test the residual current functionality using the test button at least every six months to ensure the mechanism remains operational and provides continuous protection for your electrical system.