SIEMENS JJY:023464020002 SINAMICS G120 Braking Resistor for Power Module FSF 25kW 50kW

The SIEMENS JJY:023464020002 SINAMICS G120 Braking Resistor is engineered for superior performance in demanding industrial applications, offering robust heat dissipation and enhanced drive system reliability. This critical component is designed to manage regenerative energy effectively, preventing overvoltage conditions in Sinamics G120 converter systems, particularly those utilizing 25kW and 50kW power modules. Its advanced design ensures efficient braking torque when required, safeguarding motor and drive components from potential damage.

Product Specifications

| Parameter                 | Value                                  |

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

| Manufacturer              | Siemens                                |

| Product Series            | SINAMICS G120                          |

| Product Type              | Braking Resistor                       |

| Part Number               | JJY:023464020002                       |

| Compatibility             | Sinamics G120 Power Modules (FSF)      |

| Rated Power               | 25kW / 50kW (dependent on power module) |

| Resistance Value          | (Refer to specific module datasheet)   |

| Protection Rating         | (Refer to specific module datasheet)   |

| Operating Temperature     | (Refer to specific module datasheet)   |

| Dimensions (approx.)      | (Refer to specific module datasheet)   |

| Mounting Type             | (Refer to specific module datasheet)   |

Core Features & Market Positioning

The SIEMENS JJY:023464020002 stands out for its seamless integration within the SINAMICS G120 platform, a globally recognized standard for variable speed drives. This braking resistor's primary advantage lies in its ability to absorb excess energy generated during motor deceleration, a common occurrence in applications requiring frequent stopping or speed changes. Unlike generic solutions, it is precisely engineered to match the dynamic characteristics of the G120 power modules, ensuring optimal performance and longevity. Its robust construction, characteristic of Siemens industrial automation products, positions it as a reliable, long-term investment for machine builders and end-users prioritizing operational continuity and safety.

Key Application Scenarios

This braking resistor is indispensable in applications where dynamic braking is a necessity. This includes hoist and crane systems, material handling equipment like conveyors and automated guided vehicles (AGVs), and machine tools where precise positioning and rapid stopping are paramount. Industrial sectors such as manufacturing, logistics, automotive production, and packaging lines frequently leverage the SINAMICS G120 with braking resistors to manage regenerative energy and ensure smooth, controlled motor operation, thereby enhancing process efficiency and preventing downtime.

Practical System Integration Guidance

Integrating the SIEMENS JJY:023464020002 braking resistor into a SINAMICS G120 system is straightforward for qualified personnel. The resistor is typically connected to the DC bus terminals of the compatible G120 Power Module (FSF). It is crucial to ensure that the resistor's power rating and resistance value are correctly selected based on the specific power module and the expected braking duty cycle as detailed in the SINAMICS G120 system manual. Proper wiring, adhering to local electrical codes and manufacturer guidelines, is essential for safety and optimal performance. Verify that the DC link capacitors are correctly charged before connecting the resistor.

Operation and Risk Mitigation

The primary function of the SIEMENS JJY:023464020002 is to dissipate excess energy as heat when the motor acts as a generator, thus preventing the DC bus voltage from exceeding safe operating limits. This protects the power module and other drive components from overvoltage stress. During operation, the resistor will generate significant heat, necessitating adequate ventilation and ensuring it is not placed in proximity to heat-sensitive materials or equipment. Always ensure the drive is safely powered down and discharged before performing any maintenance or inspection of the braking resistor. Common troubleshooting involves checking connections and verifying resistor integrity if overvoltage faults persist.

Scalability & Long-Term Value

As part of the SINAMICS G120 ecosystem, the JJY:023464020002 braking resistor offers excellent scalability and long-term value. It is compatible with a range of G120 power modules, allowing for system upgrades or modifications without requiring a complete overhaul of the braking solution. Siemens' commitment to backward compatibility and modular design ensures that this component can be integrated into evolving automation architectures, including those embracing Industrial Internet of Things (IIoT) concepts and advanced digital monitoring systems. This modularity supports future-proofing of industrial automation investments.

FAQs

Q1: What is the primary function of the SIEMENS JJY:023464020002 braking resistor?

It absorbs excess energy generated during motor deceleration. This prevents overvoltage on the DC bus of the Sinamics G120 drive. It ensures safe and reliable operation of the drive system.

Q2: Which SIEMENS SINAMICS G120 power modules is this braking resistor compatible with?

This resistor is designed for specific FSF power modules within the Sinamics G120 range. It is particularly suited for 25kW and 50kW applications. Always consult the specific power module's datasheet for definitive compatibility.

Q3: How is the braking resistor connected to the SINAMICS G120 drive?

It connects to the DC bus terminals on the compatible G120 power module. Proper wiring according to electrical codes and Siemens' guidelines is mandatory. Ensure the drive is powered down before connecting.

Q4: What are the key technical specifications to consider when selecting this resistor?

Consider the resistor's power rating and resistance value. Ensure these match the specific power module and application duty cycle. Ventilation requirements are also critical due to heat generation.

Q5: Can this braking resistor be used in applications with frequent stopping and starting?

Yes, this is precisely where such a resistor excels. It manages regenerative energy during deceleration in frequent stop/start cycles. This protects the drive from overvoltage stress.

Q6: What safety precautions should be taken when installing or maintaining the braking resistor?

Always ensure the drive is completely de-energized and the DC bus discharged before any work. The resistor can become very hot during operation; allow it to cool before touching. Follow all safety protocols.

Q7: How does this braking resistor contribute to the longevity of the SINAMICS G120 drive?

By preventing overvoltage, it shields the power module and other sensitive drive components from damage. This reduces the risk of premature failure and extends the overall lifespan of the drive system.

Q8: Is adequate ventilation crucial for the proper functioning of this braking resistor?

Absolutely. The resistor dissipates energy as heat, so sufficient airflow is required. Improper ventilation can lead to overheating and potential component failure or derating.

Q9: Where can I find the exact resistance value and other detailed technical data for the JJY:023464020002?

The precise technical specifications, including resistance value and enclosure details, are found in the Siemens SINAMICS G120 system manual or the datasheet for the specific compatible power module. This ensures correct selection.

Q10: What is the typical lifespan of a SIEMENS braking resistor?

With proper installation, operation within specified parameters, and adequate ventilation, these resistors are designed for a long service life. They are generally robust industrial components.