ABB S201-D10 10A D Curve Miniature Protection Unit
The ABB S201-D10 10A D Curve Miniature Protection Unit is a robust and reliable single-pole circuit breaker designed for demanding electrical protection applications. Its D-curve tripping characteristic makes it particularly well-suited for circuits with high inrush currents, such as those powering motors, transformers, or inductive loads. This ensures effective protection against overloads and short circuits without premature nuisance tripping. Engineered with ABB's renowned System Pro M Compact S200 design, the S201-D10 offers a breaking capacity of 6 kA, ensuring safety and operational integrity in residential, commercial, and industrial environments. Its compact form factor and DIN rail mounting capability facilitate straightforward installation and integration into existing electrical panel systems.
Product Specifications
| Specification | Value |
| :---------------------------------- | :---------------------------------------------- |
| Manufacturer | ABB |
| Series | System Pro M Compact S200 |
| Model Number | S201-D10 |
| Poles | 1 |
| Rated Current (In) | 10 A |
| Tripping Characteristic | D Curve |
| Rated Operational Voltage (AC) | 230/400 V |
| Rated Operational Voltage (DC) | 72 V |
| Rated Voltage (UL/CSA) | 277 V AC / 60 V DC |
| Breaking Capacity (Icn @ 230/400V) | 6 kA |
| Breaking Capacity (Icu @ 230V) | 10 kA |
| Breaking Capacity (Icu @ 400V) | 10 kA |
| Rated Impulse Withstand Voltage | 4 kV |
| Rated Insulation Voltage (Ui) | 440 V |
| Mounting Type | DIN Rail (TH35-15) |
| Dimensions (H x W x D) | 88 mm x 17.5 mm x 69 mm |
| Ambient Operating Temperature | -25 °C to +55 °C |
| Degree of Protection | IP20 (Enclosure with Cover IP40) |
| Electrical Endurance | 20,000 cycles |
| Mechanical Endurance | 20,000 cycles |
| Terminal Type | Screw Clamp |
| Tightening Torque | 2.8 N·m (UL/CSA), 18 in·lb (UL/CSA) |
| Conductor Connection Capacity | 0.75 - 25 mm² (solid), 18-8 AWG (Busbar) |
| Housing Material | Insulation Group II, RAL 7035 |
| Compliance Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077, CSA 22.2 |
Core Features & Market Positioning
The ABB S201-D10 distinguishes itself through its robust construction and specialized D-curve characteristic, positioning it as a premium solution for applications susceptible to high transient currents. Unlike Type B or C breakers, the D-curve's higher magnetic trip setting (typically 10-13 times the rated current) prevents nuisance tripping during motor startups or when using equipment with significant inrush, such as transformers and certain lighting systems. This selectivity is crucial in industrial settings where operational continuity is paramount. Furthermore, its compliance with multiple international standards (IEC, UL, CSA) underscores its versatility and suitability for global markets, reinforcing ABB's reputation for producing reliable and high-performance electrical protection devices. The S200 series, to which the S201-D10 belongs, is known for its current-limiting capabilities and dual tripping mechanisms (thermal for overload, electromechanical for short circuits), offering comprehensive protection in a compact footprint.
Key Application Scenarios
The ABB S201-D10 is engineered for specific, demanding applications where robust protection against overcurrents, coupled with tolerance for high inrush currents, is essential. Its primary use cases include:
Motor Control Circuits: Ideal for protecting individual motors and motor control circuits where the high starting current of the motor can cause nuisance tripping in standard circuit breakers. Transformer Protection: Suitable for circuits feeding transformers, which exhibit significant current draw upon energization. Industrial Machinery: Employed in the protection of various industrial machines and equipment that may have inductive components or experience large transient loads. Lighting Systems: Particularly beneficial for circuits powering fluorescent lighting banks or other lighting systems known for their inrush characteristics. Commercial and Residential Distribution Boards: While its D-curve is geared towards specific loads, it can be used in general distribution for circuits with high, predictable inrush. Automation and Electronics: Its precise protection capabilities make it suitable for integration into complex automation and electronic systems requiring reliable circuit safeguarding.
Practical System Integration Guidance
Integrating the ABB S201-D10 into an electrical system is straightforward due to its design and compliance with standard mounting practices. The unit is designed for mounting on a standard 35mm DIN rail, common in most electrical enclosures and distribution boards. When wiring, ensure that the power source is properly disconnected and locked out to prevent electrical shock. The S201-D10 features screw clamp terminals that can accommodate conductor sizes ranging from 0.75 to 25 mm² for solid conductors and up to 8 AWG for busbars. The recommended tightening torque for the terminals is 2.8 N·m (25 in·lb) to ensure a secure and reliable connection. For systems requiring auxiliary functions such as remote signaling or tripping, bottom-fitting auxiliary contacts can be mounted on the S200 series breakers, saving valuable space within the panel. It's crucial to ensure that the supply voltage and frequency align with the unit's specifications (230/400 V AC, 50/60 Hz).
Operation and Risk Mitigation
The ABB S201-D10 operates using a dual-mechanism protection system: a delayed thermal element for overload protection and an electromechanical element for instantaneous short-circuit protection. This ensures that the breaker trips only when a fault condition exceeds its defined thresholds, safeguarding both the circuit and connected equipment. Proper installation is the primary risk mitigation strategy. Ensuring correct cable sizing, secure terminal connections, and adherence to local electrical codes is paramount. In the event of a trip, visually inspect the circuit for the cause of the overload or short circuit. If the cause is not immediately apparent or if trips occur repeatedly, professional diagnosis by a qualified electrician is recommended. Do not attempt to reset a tripped breaker repeatedly without identifying and rectifying the underlying fault, as this can lead to equipment damage or fire hazards. The operating temperature range of -25°C to +55°C should be respected to maintain optimal performance and prevent premature failure.
Scalability & Long-Term Value
The ABB S201-D10, as part of the System Pro M Compact S200 range, offers significant long-term value and scalability. Its modular design allows for easy replacement or expansion of protection devices within an existing panel. Compatibility with a wide array of ABB System pro M accessories, such as auxiliary contacts and signaling units, enhances its functionality and integration capabilities. While the S201-D10 itself is a foundational protection component, its seamless integration with other ABB products and broader electrical distribution systems ensures that it remains a valuable asset as electrical infrastructure evolves. Although one source indicates this specific model may have been discontinued by the manufacturer, its widespread availability through distributors and its robust design mean it continues to be a reliable choice for many applications. Its adherence to international standards also ensures compatibility with components from various manufacturers, facilitating system upgrades and expansions without vendor lock-in.
Frequently Asked Questions (FAQs)
1. What is the primary advantage of the D-curve on the ABB S201-D10?
The D-curve characteristic is designed for high inrush currents. It allows for higher current surges than standard B or C curves before tripping. This makes it ideal for inductive loads.
This specific tripping profile prevents nuisance tripping during motor startups or transformer energization. It ensures operational continuity for equipment with significant transient power demands.
By tolerating these temporary high currents, the S201-D10 protects the circuit without unnecessarily interrupting power. This enhances system reliability.
2. Can the ABB S201-D10 be used for DC applications?
Yes, the ABB S201-D10 is rated for DC voltage applications. It can be used in circuits operating at up to 72V DC.
This makes it suitable for various DC power systems, including some control circuits or specific low-voltage DC installations. Always ensure proper pole orientation for DC use if specified.
When used in DC circuits, its performance and tripping characteristics may differ slightly from AC. Refer to the datasheet for specific DC operational guidelines.
3. What is the breaking capacity of the ABB S201-D10?
The ABB S201-D10 has a rated breaking capacity (Icn) of 6 kA at 230/400V AC according to IEC/EN 60898-1. It also has an ultimate short-circuit breaking capacity (Icu) of 10 kA at 230V AC and 10 kA at 400V AC according to IEC/EN 60947-2.
This breaking capacity indicates the maximum fault current the breaker can safely interrupt without being destroyed. A higher breaking capacity ensures greater safety in high-fault current scenarios.
The 6 kA rating is sufficient for many residential and light commercial applications. For areas with higher potential fault currents, breakers with higher kA ratings are necessary.
4. How do I install the ABB S201-D10?
Installation requires mounting the unit onto a standard 35mm DIN rail. Ensure the power supply is completely disconnected before proceeding.
Connect the line conductors to the top terminals and the load conductors to the bottom terminals. Use appropriate wire gauges and torque settings for secure connections.
Verify all connections are tight and the breaker is securely fastened to the DIN rail before energizing the circuit. Always follow local electrical codes and safety regulations.
5. What applications are best suited for a D-curve circuit breaker like the S201-D10?
D-curve breakers are ideal for circuits with high inrush currents. This includes motors, transformers, and some types of lighting.
These devices are designed to handle temporary current surges without tripping. This prevents nuisance shutdowns in demanding industrial applications.
They provide protection against overloads and short circuits while accommodating the specific needs of inductive or capacitive loads.
6. What standards does the ABB S201-D10 comply with?
The S201-D10 complies with several key international standards. These include IEC/EN 60898-1 and IEC/EN 60947-2.
It also meets UL1077 and CSA 22.2 No. 235 requirements. This broad compliance ensures its suitability for various global markets and applications.
These certifications attest to its safety, reliability, and performance characteristics in diverse electrical environments.
7. Is the ABB S201-D10 suitable for commercial and industrial use?
Yes, the S201-D10 is designed for residential, commercial, and industrial applications. Its robust construction and D-curve characteristic make it particularly valuable in industrial settings.
The breaker's ability to handle high inrush currents is critical for many types of industrial machinery and equipment. This ensures reliable operation and protection.
Its compliance with various standards further supports its use in demanding commercial and industrial electrical distribution systems.
8. What is the difference between a D-curve and a C-curve breaker?
A C-curve breaker trips between 5 to 10 times its rated current for short circuits. A D-curve breaker trips between 10 to 20 times its rated current.
The D-curve is less sensitive to transient currents, making it better for high-inductive loads. A C-curve is suitable for general-purpose use with moderate inrush.
Choosing the correct curve is essential for effective circuit protection and avoiding nuisance tripping. The D-curve is for more demanding inductive loads.
9. Can auxiliary contacts be fitted to the ABB S201-D10?
Yes, bottom-fitting auxiliary contacts can be mounted on the S200 series, including the S201-D10. These contacts are used for signaling or remote control functions.
Adding auxiliary contacts allows for enhanced system monitoring and integration with control systems. This can be crucial for complex industrial automation setups.
The modular design of the S200 series facilitates the addition of such accessories, saving space within the electrical panel.
10. What is the environmental operating temperature range for the S201-D10?
The ABB S201-D10 can operate reliably within an ambient temperature range of -25°C to +55°C. Storage temperatures can range from -40°C to +70°C.
Adhering to these temperature limits ensures the longevity and proper functioning of the circuit breaker. Extreme temperatures can affect performance and lead to premature failure.
These specifications make the S201-D10 suitable for installation in a wide variety of environmental conditions encountered in industrial and commercial settings.
