"Robert L. Berger" wrote: >> I would like to see the source of this data!! >> > > While I have never designed a transformer of neon sign service, I > have designed transformers for the old tube type ham radio > transmitters, as well as pulse welding transformers, and your > statements do not compute. > > "Ole Bob"
Here is another source for the same information. Note that if you load one to about 80% of its speced short circuit current it will generate only about 50 to 75% of it's open circuit voltage, so both are saying about the same thing as far as typical loading is concerned. A 30 mA transformer should be run in the 23 to 25 mA range as shown on this site: http://www.signweb.com/installation/cont/neonrepair.html Transformer loading problems Loading refers to the size and length of tubing in a particular neon circuit operated by a given transformer. Both overloading and underloading a transformer can cause failure. Overloaded transformers provide inadequate current for the length of tubing operated. This frequently causes the GTO insulation to break down and the wiring to short-out. It can also burn out the transformer. Underloaded transformers create excessive heat throughout the system. Both the tubing and transformer will typically "run hot," leading to early failure. Because transformers are designed with an 80% load factor (80% of the short circuit current rating), the optimum load currents are as follows: 20mA transformers: 15.5-16.5mA 30mA transformers: 23-25mA 60mA transformers: 46-50mA ....... Marshall -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
