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This manual describes the Siemens ETU 320 LI, ETU 350 LSI / ETU 650 LSI, ETU 360 LSIG / ETU 660 LSIG, which are electronic trip units designed for circuit breakers. These devices are crucial components in electrical distribution systems, providing protection against overcurrents and short circuits, thereby ensuring the safety and reliability of the electrical network.
The ETU (Electronic Trip Unit) series covered in this manual are advanced protection devices for circuit breakers. Their primary function is to monitor the current flowing through the circuit and initiate a trip command to the circuit breaker when predefined fault conditions are detected. This prevents damage to electrical equipment and ensures the safety of personnel.
The specific models indicate different levels of functionality and protection features:
The trip units are designed to comply with IEC 60947 standards, indicating their adherence to international safety and performance requirements for low-voltage switchgear and controlgear. The presence of the CE mark signifies conformity with European Union health, safety, and environmental protection standards.
The manual references specific product numbers:
These numbers likely correspond to different variants of the trip units, potentially indicating variations in current ratings, voltage ranges, or specific feature sets.
The required tools for installation and maintenance are specified:
These tools are standard for electrical work, suggesting a straightforward installation process for qualified personnel.
Torque specifications are provided for certain assembly steps:
This precise torque ensures secure connections and proper functioning of the device, preventing loose contacts that could lead to overheating or intermittent operation.
The manual also lists various functional test codes, such as TD310, TD410, and TD420, which are likely used for diagnostic purposes to verify the operational integrity of the trip unit. These codes are associated with different types of circuit breakers:
This indicates compatibility with both fixed and drawout types of 3WL10 circuit breakers, as well as 3VA27 circuit breakers with different operating mechanisms (SE and toggle).
The trip units are designed for integration into circuit breakers, providing a user interface for configuration and status monitoring. The images show a display panel with buttons for "Test," "Configuration," and "Q" (likely for Quick access or specific function). The "OK" and "X" buttons suggest menu navigation and selection capabilities.
The functional test feature is a key usage aspect, allowing users to verify the correct operation of the trip unit without necessarily tripping the main circuit. This is crucial for routine maintenance and commissioning.
The device's design, as depicted in the removal and assembly diagrams, suggests a modular approach, allowing for easy installation, replacement, or upgrade of the trip unit within the circuit breaker assembly. The step-by-step instructions for removal and assembly, including the use of specific tools and torque values, highlight the precision required for proper integration.
The manual strongly emphasizes safety during maintenance, with prominent warnings in multiple languages about hazardous voltage and the risk of death or serious injury. It explicitly states that all power sources must be turned off and locked out before any work is performed on the device. All covers must be replaced before re-energizing the device.
A critical maintenance feature is the requirement for qualified personnel to perform installation and maintenance tasks. This ensures that individuals with the necessary training and expertise handle the device, minimizing risks and ensuring proper operation.
The modular design facilitates maintenance by allowing the trip unit to be easily removed and reinstalled. The detailed diagrams for removal and assembly serve as a guide for technicians, ensuring that the process is followed correctly. The functional test procedures (TD310, TD410, TD420) are integral to maintenance, enabling technicians to verify the trip unit's health and performance after any service or during routine checks.
The provision of a technical support internet link (http://www.siemens.com/lowvoltage/technical-support) is a valuable maintenance feature, offering access to additional resources, troubleshooting guides, and expert assistance. The manual also states that it is subject to change without prior notice and should be stored for later use, indicating the importance of keeping up-to-date documentation for maintenance purposes.
General| Brand | Siemens |
|---|---|
| Model | 3VW9011-5AA00 |
| Category | Industrial Equipment |
| Language | English |
