ABB S202-C20 20A Miniature Breaker 2 Pole C Curve

The ABB S200 series, specifically the S202-C20 20A Miniature Circuit Breaker with 2 poles and a C-curve tripping characteristic, stands as a robust solution for reliable overcurrent and short-circuit protection in a myriad of electrical installations. Engineered for demanding industrial and commercial environments, this device offers superior tripping performance and enhanced safety features. Its C-curve designation signifies its suitability for applications where higher inrush currents are anticipated, such as those involving motors or transformers, without triggering nuisance tripping. The S202-C20 embodies ABB's commitment to quality, durability, and advanced protection technology, positioning it as a preferred choice for electrical engineers and specifiers.

Product Specifications

| Feature           | Specification                      |

| :---------------- | :--------------------------------- |

| Product Name      | Miniature Circuit Breaker          |

| Manufacturer      | ABB                                |

| Series            | S200                               |

| Model Number      | S202-C20                           |

| Rated Current     | 20A                                |

| Number of Poles   | 2                                  |

| Tripping Curve    | C                                  |

| Rated Voltage     | 400V AC                            |

| Frequency         | 50/60 Hz                           |

| Breaking Capacity | 6 kA                               |

| Terminal Type     | Screw Terminal                     |

| Mounting Type     | DIN rail                           |

| Protection Class  | IP20                               |

| Operating Temp.   | -25 °C to +45 °C                   |

| Standards         | IEC/EN 60898-1, IEC/EN 60947-2     |

Core Features & Market Positioning

The ABB S202-C20 distinguishes itself through its precise C-curve tripping characteristic, which is crucial for applications with moderate inductive loads where temporary current surges are common. This feature minimizes unnecessary disconnections, enhancing operational continuity compared to B or K curve breakers in similar scenarios. The 6 kA breaking capacity provides ample protection against fault currents typically encountered in residential, commercial, and light industrial settings. Its robust construction, conforming to stringent IEC/EN standards, ensures long-term reliability and safety, a hallmark of ABB's established reputation in the electrical protection market. The S200 series is widely recognized for its balance of performance, cost-effectiveness, and compliance.

Key Application Scenarios

This 2-pole, 20A miniature breaker is ideally suited for protecting electrical circuits in distribution boards within commercial buildings, such as offices and retail spaces, where lighting, general power outlets, and small motor loads are prevalent. In industrial settings, it serves effectively for safeguarding circuits feeding small motors, pumps, fans, and transformers that exhibit moderate inrush currents during startup. Its C-curve tripping characteristic makes it a superior choice over B-curve breakers when protecting circuits with inductive loads that might otherwise cause nuisance tripping. The 400V AC rating also makes it suitable for 3-phase systems where single-pole protection is required for individual circuits or phases.

Practical System Integration Guidance

Installation of the ABB S202-C20 is straightforward, utilizing standard 35mm DIN rail mounting. Ensure the main power supply is de-energized before commencing any wiring. Connect the incoming live conductors to the upper terminals and the outgoing protected circuit conductors to the lower terminals. For a 2-pole breaker, both live conductors of the circuit being protected should be connected. Proper wire termination, using appropriate cable lugs and ensuring a secure screw connection, is vital to prevent overheating and ensure reliable operation. It is recommended to adhere to local electrical codes and standards during installation.

Operation and Risk Mitigation

The S202-C20 operates by automatically interrupting the circuit when the current exceeds a safe level, preventing damage to equipment and mitigating fire hazards. The C-curve responds to overcurrents that are 5 to 10 times the rated current, providing a balance between sensitivity to faults and tolerance for inrush currents. In case of a trip, visually inspect the breaker and the protected circuit for faults. Common causes for tripping include overload conditions, short circuits, or faulty connected appliances. Always reset the breaker only after the fault condition has been identified and rectified. Never attempt to bypass or disable the breaker, as this bypasses critical safety mechanisms.

Scalability & Long-Term Value

The ABB S200 series offers excellent compatibility with other components within the S200 and broader ABB product ecosystems, facilitating straightforward upgrades or expansions of existing electrical systems. Its adherence to international standards ensures that it integrates seamlessly with panels and busbar systems from various manufacturers that also comply with these standards. While the S202-C20 itself is a fixed-rated device, the modular nature of the S200 series allows for easy replacement or the addition of auxiliary contacts for remote signaling or other control functions, enhancing the long-term adaptability and intelligence of the electrical installation.

Frequently Asked Questions

What is the primary function of the ABB S202-C20 20A Miniature Breaker?

This breaker's core purpose is to protect electrical circuits from damage caused by overcurrents and short circuits. It acts as an automatic safety switch.

It safeguards connected electrical equipment and wiring from excessive current flows. This prevents overheating, potential fires, and damage to sensitive components.

By tripping when fault currents are detected, it ensures the overall safety and reliability of the electrical installation. This is critical for both residential and industrial applications.

What does the "C" in S202-C20 signify regarding tripping characteristics?

The "C" designates a C-curve tripping characteristic, suitable for loads with moderate inductive characteristics. This includes devices like motors or transformers.

It allows for higher inrush currents during startup without causing nuisance tripping. This ensures operational continuity for equipment with temporary high starting currents.

Compared to B-curve breakers, the C-curve offers a wider operational window for inductive loads, making it more versatile in certain industrial and commercial applications.

Can the ABB S202-C20 be used for single-phase and three-phase applications?

This is a 2-pole breaker, making it suitable for protecting single-phase circuits or for use in a three-phase system to protect individual phases or specific single-phase loads within that system.

When used in a 3-phase distribution board, two S202-C20 breakers can be installed side-by-side to protect a single-phase load requiring double-pole switching and protection.

It is important to ensure that the breaker's voltage and current ratings are appropriate for the specific phase and load it is intended to protect within either single-phase or three-phase configurations.