tailieunhanh - Integrating Electronic Equipment and Power into Rack Enclosures

When a system has developed a refrigerant leak, the repair has been effected, it has then undergone a final leak test and has been charged with refrigerant, the efficient service engineer will always check the operating conditions of the plant. This chapter is designed to assist the engineer in establishing whether the plant is indeed operating to its design conditions. Merely to repair a leak and recharge the system may be a ‘short cut to disaster’ if the refrigerant leak was in fact the result of another, undiscovered fault which will lead to an expensive call-back and a dissatisfied customer: short cuts can lead to trouble!. | Integrating Electronic Equipment and Power into Rack Enclosures Optimized Power Distribution and Grounding for Audio Video and Electronic Systems Technical isolated ground wire terminated in main panel only no connection to sub panel ground Neutral Ground Bar Building ground wire or conduit From Transformer Neutral On insulators Grounded Conductor Neutral Ground combined Middle Atlantic Products Grounding Conductor Grounded Conductor neutral Rev. 4b Table of Contents A Note about Signal Ground Loops and Signal Signal Wiring Unbalanced Balanced AC Magnetic Fields Their Effect on Signal Electric Fields Their Effect on Signal Radio Frequency Interference RFI .5 Important Things to Remember When Designing Installing Audio Video North American Product Safety Dealing With Electrical Inspectors and Electrical Typical 120-Volt Receptacles Used For Electronic Receptacle Wiring - Common Errors and the Correct AC Power Wiring AC Magnetic Field Strengths from Different Wiring Calculating System Calculating Amplifier Circuit Single Circuit Sequencer Multiple Circuit Sequencer Simplified Grounding Guidelines for Audio Video and Electronic Isolation Transformers Separately Derived Systems Benefits and Wiring Methods . 19 Isolation Transformer Neutral-Ground Bonding Electrostatic Faraday Shielding in Power K-Rated Three Phase Power Typical Three Phase Services . 24 Phasing of Supply Conductors . 25 60 120V Symmetrical Balanced Power Ground Myths. 28 Neutral-Ground Reversals and Bootleg Neutral-Ground Steps to Troubleshoot Bootleg Grounds and Neutral-Ground Auxiliary Ground Intersystem Bonding Cable TV Satellite TV Telephone .35 Power Quality Power Quality Problems Voltage .