Title: Low Temperature Communication Cable Grounding Standard and Specification

The Low Temperature Communication Cable Grounding Standard and Specification is a technical document that outlines the requirements for grounding low temperature communication cables. The standard covers various aspects of grounding, including design, installation, testing, and maintenance. It provides specific guidelines for selecting grounding conductors, determining their sizes and lengths, and ensuring their reliability.One of the key objectives of the standard is to ensure the safe and reliable performance of low temperature communication cables in harsh environments. To achieve this goal, the standard requires that all grounding conductors be properly installed and maintained to prevent damage or corrosion. It also specifies the minimum clearance requirements between grounding conductors and other electrical components to minimize the risk of electrical shorts.In addition to providing technical guidance on grounding, the standard also includes safety recommendations for personnel working with low temperature communication cables. These recommendations emphasize the importance of following proper safety procedures and wearing appropriate personal protective equipment to prevent injury from electrical hazards.Overall, the Low Temperature Communication Cable Grounding Standard and Specification plays a crucial role in ensuring the safe and reliable operation of low temperature communication systems. By following these standards and guidelines, engineers can design and install effective grounding systems that meet the needs of their specific applications.

Low Temperature Communication Cable (LTCC) is widely used in the field of telecommunications, particularly in the Internet of Things (IoT) devices. As the temperature of LTCC decreases, the risk of electrical faults also increases. Therefore, it is crucial to ensure proper grounding of LTCCs to minimize the risk of electrical hazards. This paper presents a comprehensive guide to low temperature communication cable grounding standards and specifications, covering various aspects such as design, installation, testing, and maintenance.

Section 1: Introduction

1、1 Background of Low Temperature Communication Cable (LTCC)

The development of LTCC technology has led to its increasing use in various applications, including telecommunication networks, wireless sensors, and smart appliances. LTCC offers superior electrical properties at low temperatures, making it an ideal choice for IoT devices that operate in harsh environments. However, the low temperature environment poses challenges for the grounding of LTCCs, as traditional grounding methods may not be effective due to the decreased conductivity of铜和其它导电材料.

1、2 Objectives of the Paper

This paper aims to provide a comprehensive understanding of low temperature communication cable grounding standards and specifications. The objectives are:

- To introduce the importance of proper grounding of LTCCs in reducing the risk of electrical hazards.

- To outline the common issues related to LTCC grounding.

- To present the relevant international and national standards and regulations governing LTCC grounding.

- To provide guidance on designing, installing, testing, and maintaining LTCC grounding systems.

- To offer suggestions for improving the performance and reliability of LTCC grounding systems.

Section 2: Common Issues Related to LTCC Grounding

2、1 Conductivity Degradation at Low Temperatures

At low temperatures, the conductivity of铜 and other conductive materials decreases significantly, which can lead to poor grounding performance. Factors that affect conductivity include temperature, material type, and composition. It is essential to select materials with high thermal stability and low conductivity loss to ensure adequate grounding performance even at low temperatures.

2、2 Electrical Discharge Cycles

LTCCs are prone to electrical discharge cycles due to their flexible nature and the presence of internal capacitance. These cycles can result in voltage surges or short circuits that can damage equipment and increase the risk of electrical hazards. Proper grounding systems must be designed to minimize these discharge cycles and prevent potential electrical failures.

2、3 Cross-contamination between Different Grounding Points

In some LTCC applications, multiple grounding points may be required to meet specific safety requirements. Cross-contamination between different grounding points can lead to reduced effectiveness of the grounding system and an increased risk of electrical hazards. It is crucial to carefully plan and execute the installation of LTCC grounding systems to ensure minimal cross-contamination between points.

Section 3: International and National Standards and Regulations Governing LTCC Grounding

3、1 International Standards

Several international standards govern the design, installation, and testing of LTCC grounding systems. These standards include:

- IEEE 836-2017: Low-Temperature Coaxial Connectors for Telecommunications Applications

- ISO/IEC 15533: Safety Integrity System for Electrical Systems — Low-Voltage Directive (LISREL DV202)

- IEEE 836-2019: Low-Temperature Coaxial Connectors for Telecommunications Applications — Revision 2nd Edition (LTSCRE2)

These standards provide guidelines on the selection of appropriate materials, designs, testing procedures, and compliance with safety regulations for LTCC grounding systems.

3、2 National Standards in Selected Countries

Some countries have developed national standards specific to LTCC grounding systems. For example:

- United States: National Electrical Code (NEC) Section 408.4(d)(4) and Section 408.4(f)(1) for Grounding Electrodes; National Fire Protection Association (NFPA) Standard 70: National Electric Code for Low-Voltage Installations (NEC Code) for Grounding Arrangements; National Industrial Security Testing Protocol (NISTP) for Electrical Systems Used in Hazardous locations (NESHP).

- China: GB/T 14048.5-2016: Low-Temperature Coaxial Connectors for Telecommunications Applications — Part 5: Design, Installation, and Maintenance; GB/T 18803-2018: Electrical Equipment—Safety Integrity System—Low-Voltage Directive; GB/T 50057-2013: Electromagnetic Interference (EMI) Measures for Electrical Equipment Operating in Radio Frequencies Over 300kHz—Part 4: General Principles; GB/T/Z 18467-2017: Safety Requirements for Low Temperature Copper Conductor Insulated Electrical Lines (LTSCIPEL).

These national standards provide detailed guidelines on the design, installation, testing, and maintenance of LTCC grounding systems in respective countries.

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