Siemens 5SY6432-8CC Single Phase Extra High Power Motor Breaker 4P 32A

The Siemens 5SY6432-8CC Single Phase Extra High Power Motor Breaker 4P 32A is a robust protection device designed for demanding industrial applications. This 4-pole, 32A circuit breaker offers superior overcurrent and short-circuit protection, ensuring the longevity and reliability of connected machinery, particularly motors. Its key advantages lie in its high breaking capacity, precise tripping characteristics, and durable construction, making it a preferred choice for safeguarding critical electrical infrastructure. The device conforms to stringent international standards, providing peace of mind for installers and end-users alike.

Product Specifications

| Parameter                     | Value                             |

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

| Manufacturer                  | Siemens                             |

| Manufacturer Product Number | 5SY6432-8CC                       |

| Product Classification        | Miniature Circuit Breaker         |

| Number of Poles               | 4P                                |

| Rated Current (Inom)          | 32A                               |

| Rated Voltage                 | 400V AC                           |

| Breaking Capacity (Icu/Icn) | 6kA                               |

| Tripping Characteristic       | Type B (as per 5SY6332-8CC)       |

| Insulation Voltage (Ui)       | 440V AC                           |

| Mounting                      | DIN rail mounting                 |

| Dimensions (H x W x D)        | 90 mm x 72 mm x 76 mm             |

| Installation Depth            | 70 mm                             |

| Operating Temperature Range   | -25°C to +55°C                    |

| Storage Temperature Range     | -40°C to +75°C                    |

| Conductor Cross-Section (Solid) | 0.75 mm² to 35 mm²                |

| Conductor Cross-Section (Stranded) | 0.75 mm² to 35 mm²                |

| Conductor Cross-Section (Fine Stranded w/ Core End Processing) | 0.75 mm² to 25 mm²                |

| Tightening Torque             | 2.5 N·m to 3.5 N·m                |

| Protection Type               | Touch protection                  |

Core Features & Market Positioning

The Siemens 5SY6432-8CC stands out in the competitive landscape of motor protection devices due to its exceptional reliability and adherence to rigorous industrial standards. Its Type B tripping characteristic offers sensitive protection against overloads and short circuits, which is crucial for motor applications where inductive loads can cause transient current surges. Unlike devices with less refined tripping curves, the 5SY6432-8CC minimizes nuisance tripping while ensuring robust safety against fault conditions. This precision, combined with Siemens' reputation for engineering excellence and product longevity, positions the 5SY6432-8CC as a premium, dependable solution for critical motor control circuits. It is recognized for its robust construction, ensuring consistent performance even in harsh industrial environments.

Key Application Scenarios

This 4-pole, 32A Siemens motor breaker is ideally suited for a wide array of industrial and commercial applications requiring reliable protection for single-phase motors and associated circuits. Common scenarios include safeguarding pumps, fans, compressors, conveyor systems, and machine tools where consistent operation is paramount. The device's high breaking capacity of 6kA makes it suitable for installations with potential fault currents. Its 4-pole configuration ensures complete isolation of the circuit under fault conditions or during maintenance. Electrical engineers and system integrators frequently specify the 5SY6432-8CC for new installations or as a direct replacement in existing control panels to enhance system safety and uptime.

Practical System Integration Guidance

Integrating the Siemens 5SY6432-8CC into existing or new electrical systems is straightforward, owing to its standard DIN rail mounting and clearly defined connection points. Installers must ensure that the conductor cross-sectional area used is within the specified range of 0.75 mm² to 35 mm² for solid or stranded conductors, and up to 25 mm² for finely stranded conductors with core end processing. The recommended tightening torque for the screw-type terminals is between 2.5 N·m and 3.5 N·m to ensure a secure and reliable electrical connection, preventing overheating and potential failures. Proper phase identification and connection to the load and supply sides are critical for correct operation and protection.

Operation and Risk Mitigation

Operating the Siemens 5SY6432-8CC involves understanding its protective functions. The Type B tripping characteristic is designed to protect against overcurrents and short circuits. In the event of a fault, the breaker will trip, interrupting the power supply to prevent damage to the motor or connected equipment and mitigating risks of fire or electrical shock. To mitigate operational risks, regular visual inspections for damage and proper connection integrity are advised. While specific fault codes are not typically displayed by this type of breaker, a tripped state indicates an overcurrent or short-circuit event that requires investigation into the connected load and circuit wiring to identify and rectify the root cause before resetting the breaker.

Scalability & Long-Term Value

While the Siemens 5SY6432-8CC is a standalone protection device, its value extends through its integration into broader Siemens industrial automation ecosystems. Compatibility with other Siemens SENTRON components and systems ensures that it can be part of a scalable solution. For facilities looking to leverage Industry 4.0 capabilities, the breaker can be integrated into systems that allow for remote monitoring of circuit status through compatible accessories or gateways, contributing to predictive maintenance strategies and overall operational efficiency. Its robust design guarantees a long service life, reducing the need for frequent replacements and contributing to lower total cost of ownership.

Frequently Asked Questions

What is the primary function of the Siemens 5SY6432-8CC motor breaker?

The Siemens 5SY6432-8CC is designed to provide essential overcurrent and short-circuit protection for single-phase motors and electrical circuits. It safeguards connected equipment from damage caused by excessive current, preventing potential fires and ensuring operational continuity.

This breaker ensures system safety by rapidly interrupting power flow during fault conditions. Its robust design makes it suitable for demanding industrial and commercial environments where reliable protection is paramount.

The device's precise tripping characteristics, especially its Type B curve, offer effective protection without unnecessary nuisance tripping, a crucial factor for motor applications sensitive to transient currents.

What are the key technical specifications to consider for the Siemens 5SY6432-8CC?

Key specifications include its 4-pole configuration, a rated current of 32A, and an operating voltage of 400V AC. The breaking capacity is 6kA, offering substantial protection against fault currents.

It features a Type B tripping characteristic, which is vital for motor protection, balancing sensitivity to faults with tolerance for inrush currents. Insulation voltage is rated at 440V AC.

The breaker is designed for DIN rail mounting, with dimensions of 90mm (H) x 72mm (W) x 76mm (D) and an installation depth of 70mm, facilitating easy integration into control panels.

How does the Siemens 5SY6432-8CC contribute to system safety and reliability?

The 5SY6432-8CC contributes to safety by providing rapid disconnection of power during overcurrent or short-circuit events, preventing equipment damage and electrical hazards like fires. Its 4-pole design ensures complete circuit isolation.

The breaker adheres to international standards like IEC/EN 60898-1 and IEC/EN 60947-2, assuring users of its quality and dependable performance in critical applications.

By offering precise tripping, it minimizes downtime due to false trips, ensuring that machinery operates reliably while still being adequately protected against genuine fault conditions.