Talk:Extra high tension
|WikiProject Physics||(Rated Redirect-class)|
Limit of the voltage?
Can anyone check if the limit of the voltage is 25000 or 380000 volts? The one I encountered in high-school only goes to 5000 volts as maximum. Thanks. --Lemontea 12:51, 9 October 2005 (UTC)
- Answer from Lucian Toma (Romania) - Assistant Professor, at University "Politehnica" of Bucharest, in the field of Power Systems
- It is not correct to say tension for voltage. Tension is used for mechanical force and voltage for electromotive force.
- The voltage levels are classified as follows:
- low voltage : less than 1000 V
- medium voltage : it depends from country to country; the nominal voltages in Romania are: 6 kV, 10 kV, 20 kV and 35 kV. The limits of 35 kV for overhead electrical lines and 6-10 kV for underground electrical lines are specific for networks with isolated neutral. However, due to the expanding of distribution networks, grounded neutral networks via resistor or arc-suppression coil have been developed.
- So, in Romania medium voltage ranges from 1 kV to 35 kV
- High voltage : from 35 kV up to 275 kV, including the nominal voltages 110 kV and 220 kV (differs from country to country)
- Extra high voltage : higher than 275 kV (in Romania the nominal voltages are 400 kV and 750 kV, and in UCTE - Europe - the common voltage is 380 kV)
- Thanks for your answer, two things: a)Correct me if I'm wrong, but my physics textbook did use the term "Extra High Tension" (New Physics at Work, Book 2-Electromagnetism and Atomic Physics, Oxford University Press), though I admit I feel odd upon seeing that and attempted to check the fact here. Anyway to confirm that? b)How're we going to merge this information into the article? --Lemontea 10:35, 24 January 2006 (UTC)
Contributed 12 October 2006 by 220.127.116.11:
- It is an apparatus in laboratory.
Contributed 10 November 2006 by 18.104.22.168:
- needs of EHT
- EHT is needed in colour and B/W tv.eht is applied at a point on the aquadag's coating at the output of picture tube.this EHT (18kv for B/W & 25kv for colour tv) provides electron beams from electron gun enough speed to strike and excite phosphor dot.
I don't believe CRTs should be classified as EHV/EHT device. I've never heard them described that way, and they violate the definition of a EHV supply as given in the article, that is, they do not put out more than 275 KV.
22.214.171.124 04:27, 11 October 2007 (UTC) Shane
- EHT is the normal acronym for the accelerator supply to a television or CRO CRT. Agree it doesn't conform to the power engineering usage. Andrewa (talk) 22:59, 6 July 2011 (UTC)
Not sure whether to mark this as a stub or as a DAB. Either way it needs work, but the merge that saw it made a redirect didn't work and valuable material just disappeared. Andrewa (talk) 23:13, 6 July 2011 (UTC)