Siemens 3VA1080-4ED32-0AA0 Motor Protection Molded Case Circuit Breaker 80A 3P 36kA

The Siemens 3VA1080-4ED32-0AA0 is a robust 80A, 3-pole molded case circuit breaker designed for reliable motor protection. This unit offers a substantial breaking capacity of 36kA, ensuring safety in demanding industrial environments. Its core advantages lie in its precise current tripping characteristics, advanced thermal overload and short-circuit protection, and compact design for efficient panel integration. This Siemens circuit breaker is engineered for critical applications requiring dependable circuit interruption and safeguarding of electrical machinery.

Product Specifications

| Feature                 | Specification                      |

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

| Product Type            | Molded Case Circuit Breaker        |

| Manufacturer            | Siemens                            |

| Model Number            | 3VA1080-4ED32-0AA0                 |

| Rated Current (In)      | 80A                                |

| Number of Poles         | 3P                                 |

| Breaking Capacity (Icu) | 36kA                               |

| Tripping Type           | Thermal-Magnetic                   |

| Overload Protection     | Adjustable                         |

| Short-Circuit Protection| Adjustable                         |

| Voltage Rating          | 400/415V AC                        |

| Frame Size              | 100                                |

| Mounting Type           | DIN Rail/Panel Mount               |

| Standards Compliance    | IEC 60947-2, IEC 60947-4-1           |

| Terminal Type           | Screw Terminals                    |

Core Features & Market Positioning

The Siemens 3VA1080-4ED32-0AA0 distinguishes itself in the market through its advanced thermal-magnetic tripping unit, offering adjustable settings for both overload and short-circuit protection. This adjustability allows for fine-tuning to specific motor characteristics, preventing nuisance tripping while ensuring robust protection against damaging fault currents. Its 36kA breaking capacity provides a high level of safety, crucial for installations where fault levels can be significant. Siemens' reputation for quality and reliability further solidifies the market position of this molded case circuit breaker, making it a preferred choice for engineers seeking dependable motor circuit protection.

Key Application Scenarios

This Siemens circuit breaker is ideally suited for protecting induction motors in various industrial sectors. Common applications include motor control centers (MCCs), pump and fan drives, conveyor systems, and general industrial machinery. Its ability to handle 80A and provide precise protection makes it a reliable component for safeguarding equipment in manufacturing plants, processing facilities, and building services. The 3-pole configuration ensures complete isolation of all phases during fault conditions.

Practical System Integration Guidance

Integrating the Siemens 3VA1080-4ED32-0AA0 into existing electrical systems is straightforward due to its standard DIN rail or panel mounting capabilities. Ensure proper torque is applied to the screw terminals for secure connections, adhering to local electrical codes and standards. The thermal overload setting should be carefully adjusted based on the motor's full load current (FLC) and service factor, typically set between 100% and 125% of the FLC. Short-circuit trip settings can be adjusted to coordinate with upstream protective devices, preventing cascading trips.

Operation and Risk Mitigation

Proper operation of the Siemens 3VA1080-4ED32-0AA0 involves regular visual inspection for any signs of damage or wear. The breaker's trip mechanism can be tested periodically using a dedicated circuit breaker tester to ensure its operational readiness. In the event of a trip, identify the cause before attempting to reset the breaker. Overloads typically indicate a mechanical issue with the driven equipment, while short circuits suggest a wiring fault or equipment failure. Always ensure power is de-energized and safe before performing any maintenance or troubleshooting.

Scalability & Long-Term Value

The 3VA series from Siemens offers a pathway for scalability, with various frame sizes and current ratings available to accommodate evolving system needs. While this specific 80A unit is designed for direct use, its integration into modern control panels allows for future upgrades or modifications to the overall motor control strategy. Compatibility with Siemens' broader industrial automation portfolio ensures that this circuit breaker can be part of a larger, interconnected system, potentially supporting IIoT initiatives through associated monitoring and control modules if integrated into a comprehensive solution.

Frequently Asked Questions

What are the primary advantages of the Siemens 3VA1080-4ED32-0AA0?

This breaker offers robust motor protection via adjustable thermal overload and magnetic short-circuit tripping. Its high 36kA breaking capacity ensures safety in fault situations. The 3-pole design guarantees complete circuit isolation.

The unit provides precise current tripping, minimizing nuisance trips while safeguarding against damage. Its compact size facilitates easier panel installation and space optimization. Siemens' renowned build quality ensures long operational life.

Engineers benefit from its straightforward integration into motor control centers and distribution boards. The flexibility of adjustable settings allows for precise tailoring to specific motor loads.

How do I adjust the overload and short-circuit settings on this breaker?

Access the adjustment dials on the front face of the breaker to set overload protection, usually between 0.4 to 1.0 times the nominal current. Refer to the motor's nameplate for its full load amperage.

Short-circuit settings are typically adjusted using separate dials, offering a fixed or adjustable trip range, often a multiple of the nominal current. Consult the product manual for specific ranges and recommended settings.

Always ensure the circuit breaker is de-energized before making any adjustments. Incorrect settings can lead to equipment damage or inadequate protection.

What kind of applications is the 3VA1080-4ED32-0AA0 best suited for?

This 80A, 3-pole breaker is ideal for protecting standard industrial motors against overloads and short circuits. It's commonly found in manufacturing, water treatment, and HVAC systems.

Applications include motor control centers (MCCs), pump and fan drives, and conveyor systems where reliable motor safeguarding is paramount. Its 36kA rating is suitable for higher fault current environments.

The breaker's robustness and precise tripping characteristics make it a preferred choice for critical machinery where downtime is costly. It ensures operational continuity by preventing damage to motor windings.