TN Systems

Characteristics

TN systems have one point connected directly to ground. All exposed conductive parts must be connected to that point by protective conductors.

Depending on the way the neutral and protective conductors are fed, there are three types of TN systems:

•TN-S system: a separate protective conductor is used in the system

•TN-C-S system: the neutral and protective conductors are combined to one single conductor in a part of the system

•TN-C system: the neutral and protective conductors are combined to one single conductor in the whole system

Reference to IEC 60364-4-41 413.1.3

All exposed conductive parts of the installation must be connected to the earthed point of the power system by protective conductors which must be earthed at or near to each relevant transformer or generator.

Exposed conductive parts that are accessible at the same time must be connected to the same earthing system, either individually, in groups or collectively.

Normally the earthed point of the power system is the neutral point. If a neutral point is not available or accessible, a phase conductor must be earthed. The phase conductor must not serve as a PEN conductor.

In fixed installations a single conductor may serve both as a protective conductor and a neutral conductor (PEN conductor).

Reference to IEC 60364-5-54 546.2.3

If from any point in the installation the neutral and protective functions are provided by separate conductors, it is inadmissible to connect these conductors to each other from that point. At the point of separation, separate terminals or bars must be provided for the protective and neutral conductors. The PEN conductor must be connected to the terminal or bar intended for the protective conductor.

If there are other effective earth connections, the protective conductors must be connected to such points when it is possible. It may be necessary to earth at additional points to ensure that the potentials of protective conductors remain as close as possible to that of earth in case of a fault.

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Symmetra MW 800 kW 3 × 400/230 V Installation - 990-1510D

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American Power Conversion SYMF800KH TN Systems, Characteristics, Reference to IEC 60364-4-41, Reference to IEC 60364-5-54
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SYMF800KH specifications

American Power Conversion (APC), a subsidiary of Schneider Electric, is renowned for its expertise in providing reliable power solutions. Among its extensive product lineup, the SYMF800KH stands out as a cutting-edge uninterruptible power supply (UPS) designed to meet the demands of enterprise data centers and critical applications. This model is particularly valued for its impressive performance, adaptability, and advanced technologies.

One of the main features of the SYMF800KH is its capability to deliver an output power of 800 kVA, making it suitable for high-density loads. This UPS operates in a parallel configuration, allowing for scalability by connecting multiple units to provide increased capacity and redundancy. This adaptability ensures that organizations can grow their infrastructure without worrying about power limitations.

Another significant characteristic of the SYMF800KH is its high-efficiency operation that helps reduce energy costs and carbon footprint. With a near-unity power factor and up to 97% efficiency in double conversion mode, the SYMF800KH minimizes energy losses, benefiting both the environment and the organization's operational expenses.

The SYMF800KH is equipped with advanced technologies to ensure maximum reliability and performance. Its innovative SmartBoost and SmartTrim features enhance the UPS's ability to manage input voltage variations and optimize output voltage levels, safeguarding sensitive equipment from potential damage. The unit also boasts an intelligent battery management system, extending battery life and ensuring consistent performance during power outages.

Moreover, the SYMF800KH provides robust monitoring and management options. It is compatible with APC's software solutions, allowing users to monitor real-time data, receive alerts, and conduct remote management from a centralized interface. This feature is critical for maintaining operational reliability and ensuring timely response to any potential power issues.

In addition to its performance capabilities, the SYMF800KH is designed with ease of maintenance in mind. Its modular architecture allows for quick and straightforward replacement of components, minimizing downtime during service activities.

In conclusion, the American Power Conversion SYMF800KH is a high-performance UPS that brings together reliability, efficiency, and advanced technology, making it an ideal choice for organizations seeking to protect their critical infrastructure. By delivering scalable solutions with enhanced management features, the SYMF800KH stands as a top contender in the uninterruptible power supply market. As businesses continue to rely on technology for their daily operations, the importance of such robust power solutions cannot be overstated.
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