TAILIEUCHUNG - Electrical grounding techniques from LEM

There are a number of good reasons to ground but primary among them is to ensure personnel safety. The following agencies and organizations all have recommendations and / or standards for grounding, to ensure that personnel safety is being protected. The organizations that provide guidelines/rules for grounding are: The International Electrotechnical Commission (IEC), European Committee for Electrotechnical Standardization (CENELEC), Underwriters Laboratories (UL), National Fire Protection Association (NFPA), American National Standards Institute (ANSI), Mine Safety Health Administration (MSHA), Occupational Safety Health Administration (OSHA), Telecommunications Industry Standard (TIA) and others. Good grounding is not only for the safety of personnel but to provide for the protection of plants and equipment. A good ground system. | Ground Resistance -Principles Testing Techniques Applications Table of Contents LEM Instruments Palmersstrasse 2 A-2351 Wr. Neudorf Tel 43 2236 691-0 Fax 43 2236 691 415 email lno@ http Publication A 99415 E Printed in Austria Why Ground . 1 What is a ground and what does it do . 1 Ground Resistance Values. 1 Ground Electrodes. 2 Types of Ground Systems. 4 Ground Resistance Testing - Soil Resistivity. 4 Measuring Soil Resistivity 4 - Pole Method . 5 Ground Resisting Testing 3 - Pole Fall of Potential. 7 Ground Resistance Testing Existing Systems Selective Clamp - On. 8 Ground Resistance Testing Existing Systems Stakeless . 10 Ground Resistance Testing 2 - Pole. 10 Ground Impedance Measurements. 11 Measuring Ground Resistance at Substations. 11 Measuring Ground Resistance at Central Offices. 12 Measuring Ground Resistance at Cellular Sites Microwave and Radio Towers 13 Measuring Ground Resistance at Remote Switching Sights 14 Measuring Ground Resistance for Lightning Protection Commercial Industrial 15 Ground Testing Instruments - UNILAP GEO GEO X. 16 Ground Testing Instruments - SATURN GEO Handy hy Ground There are a number of good reasons to ground but primary among them is to ensure personnel safety. The following agencies and organizations all have recommendations and or standards for grounding to ensure that personnel safety is being protected. The organizations that provide guidelines rules for grounding are The International Electrotechnical Commission IEC European Committee for Electrotechnical Standardization CENELEC Underwriters Laboratories UL National Fire Protection Association NFPA American National Standards Institute ANSI Mine Safety Health Administration MSHA Occupational Safety Health Administration OSHA Telecommunications Industry Standard TIA and others. Good grounding is not only for the safety of personnel but to provide for the protection of plants and equipment. A good ground system will improve the reliability of .

• Điện - Điện tử
• Ground Resistance
• Principles
• Testing
• Techniques
• Applications
• Measuring Ground
• Fabrication Techniques
• Evaluate Cardiovascular
• Grasping Strategy
• Satellite Ground
• Risk Indicator
• Ploughing Resistance
• Measuring ground subsidence in Hanoi city
• Measuring ground subsidence
• Irstea TomoSAR platform
• The Haihung silt loam
• Continuous temporal coverage