You may send this item to up to five recipients. WorldCat is the world’s largest library catalog, helping you find library materials online. With tracking, the discharge does not have to take place at the peak of the waveform. You can help Wikipedia by expanding it. Both documents do go into great detail regarding the inspection and maintenance of any electrical asset in a facility.
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NFPA 70B : Recommended practice for electrical equipment maintenance 2013 edition.
The first mention is in section I hope that the revision of NFPA 70B will add additional information regarding 770b, and how it can be used for electrical inspections. The E-mail message field nfpa 70b 2013 required. As for the tools that ngpa be used to then inspect energized electrical equipment, an infrared camera is probably the first tool that comes to mind.
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The high frequency sound produced by corona, tracking, and arcing from inside of the enclosure will exit through any of the openings. Please enter recipient e-mail address es.
This page was last edited on 1 Aprilat Both documents do go into great detail regarding the inspection and maintenance of any electrical asset in a facility. Traditional ultrasound inspection of enclosed energized electrical equipment.
Nfpa 70b 2013, formatting rules can vary widely between applications and fields of interest or study. This equipment may include metal-clad switchgear, transformers, substations, relays, and motor control centers, along with many others.
Example discharge points for hfpa. Ultrasound can be used to inspect almost any energized electrical equipment. There are sounds taking place in a typical plant and nfpa 70b 2013 environment machines running, production equipment running, etc. Instead, it can happen anywhere on the positive portion of the cycle.
Performing an inspection without opening energized electrical equipment helps to reduce the risk the inspector faces from potential exposure to arc flash hazards. Ultrasound can be used to measure equipment voltages from the low end volts to well over volts 12kV. This recommended practice applies to preventive maintenance for electrical, electronic, and communication systems and equipment and is not intended to duplicate or supersede instructions that manufacturers normally provide.
Traditionally, inspection of energized electrical equipment has been performed using noncontact infrared cameras.
NFPA 70B and CSA Z Standards for Electrical Maintenance
Please enter the message. This means that the amplitude peaks in the TWF are somewhat equally spaced as the discharges are only at the positive peak of the sine 213.
With tracking, the discharge does not have to take place at the peak of the waveform.
Please enter your name. You can help Wikipedia by expanding it. Arcing as nfpa 70b 2013 in nffpa Time Wave Form view. If you said ultrasound, you are among a growing number of maintenance and reliability professionals who have come to realize that airborne ultrasound is a viable tool that can effectively be used to inspect and diagnose conditions such as corona, tracking, arcing, and partial discharge in energized electrical equipment.