HV (600V+) kako se ne ubitijedan kratki quote:
Citat:
High voltage is any voltage over 600V, as defined by the 2005 National Electrical Code (NEC) in article 490.2. Systems employing high voltages require special considerations and precautions which normally do not plague electronics. As such, high voltage systems are a specialty area where detailed design information is not freely available. Safety in high voltage (HV) systems cannot be stressed enough! The voltages present can easily provide lethal shocks. When the equipment is energized, all high - voltage areas should be avoided, and the whole work-space should be sectioned off from people who do not understand the dangers, and have some signage indicating the danger. Even after powering down the system, all capacitors connected to high voltage are potential dangers, as they could easily remain charged. Care must be taken to discharge these capacitors safely prior to any contact with the high-voltage circuit. All wires exposed must have voltage ratings high enough to safely insulate the voltage, as standard wire voltage ratings are usually 300-600V.
High-frequency high voltage (HFHV) presents dangers of radio frequency (RF) burns. HFHV will breakdown standard insulation more easily than DC, requiring a derating of the insulation voltage specified at DC on cabling and wires. Since the human body is a capacitance (Human Body Model is 100pF, defined by ESDA), if a part of the body is exposed to a HFHV wire, even on the outside of the insulation, the capacitance of the insulation of the wire and the human body can make a capacitive voltage divider with voltages high enough to pass current through the body, even through an arc. These currents are at such a high frequency that the nerves do not respond to the electricity such as the pain and contractions that happen with DC, so the burn may not be noticed
initially. At the entrance point on the body the thermal heating from the electricity breaking down the air and the skin at that point and will cause small point-like surface burns, which can become serious if the burn is high-energy or continues for a lengthy time. RF burns are simply another danger of high-voltage systems, and another reason to stay away from any part of the high-voltage system that is energized.
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Elem, ko ima nekih zgodnih linkova ka raznim "oko cega da pazis kod HV", neka dobaci .. ako se dobro secam sa "siljka" varnica na 25C skace 0.1cm po kV tako da bi 1cm razmak izmedju vodova (koji nisu spicasti) trebalo da je dovoljno za 10kV sve i ako ima nekih "spiceva" od kalaja sa kojih bi mogao da varnici .. e sad sa promenama vlaznosti vazduha ... mozda bi trebalo i veci razmak da se pravi, ne znam, znam da su one PTFE sipke koje koristimo kao izolatore na 3d printerima odlicne za HV
Re: HV (600V+) kako se ne ubiti
!!!
, to ostaviti u pudrijeri kada se radi sa VN, i najvazniji i najbolji savet koji mogu da dam, biti 