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Technical  Article
Technical Articles

Introduction of TCI
               Abstract: Dalian Tucheng International Co., Ltd (TCI) is a company specializing in manufacturing and exporting insulators, metal fittings and bushings for power transmission lines and substations...


TCI Attends 2009 Dubai Middle east electricity exihibition
Abstract: Our company, Dalian Tucheng International Co., Ltd and our sub-factory Dalian Composite Insulator Co., Ltd  attended this exhibition...


TCI & DCI Attends 2008 India electricity exihibition
               Abstract: INDIA ELECTRICITY 2008, is the focused show on Power Generation,Transmission, Distribution, New and Renewable Energy Systems, Energy Efficiency...


TCI Attends 2007 Hannover Messe
               Abstract: To know about the new information of this industry and increase potential clients,we,TCI attends this messe again. In five day exhibit...

China porcelain insulator technology runs to advanced level of the world

               Abstract: 21st. Oct, three products developed by Dalian Insulator Co., Ltd. itself passed the appraisal...

China porcelain insulator technology runs to advanced level of the world

               Abstract: 21st. Oct, three products developed by Dalian Insulator Co., Ltd. itself passed the appraisal...

Test of Bushings

               Abstract: All high-voltage bushings should be inspected periodically to intervals of not over 3-5 years...

Types of Bushings

               Abstract: High-voltage bushings for use on transformers and breakers are made in several principal types, as follows...

Mark on Porcelain Insulators

               Abstract: Porcelain insulator markings help identify both the manufacturer and the date of manufacture...

Porcelain Processing Way

               Abstract: Dry Process Porcelain...; Wet Process Porcelain...

History of Porcelain Insulator

               Abstract: Porcelain insulators had their start when local potteries began making telegraph insulators in the 1850s and 1860s...

Moisture Absorption Properties of Unidirectional Glass/Polymer Composites Used in Composite (Non-Ceramic) Insulators

               Abstract: Moisture absorption tests were performed on unidirectional glass/polymer composite materials used in high voltage composite (non-ceramic) insulators ...

First Application of 66-kV Outdoor Terminations with Composite Hollow Insulators for XLPE Cable 

              Abstract: Composite hollow insulators have a number of advantages over porcelain insulators, including lighter weight, better anti-pollution and anti-explosion properties, and easier construction...

Ceramic vs. Polymer Insulators

             Abstract: The comparison between ceramic insulators and polymer insulators from many aspacts...

Acceptance of Polymeric Housing Materials

               Abstract: The almost complete transition from porcelain to   polymeric housings in MV arresters over a period of only a decade has been nothing short of extraordinary...

One difference between porcelain and composite
              Abstract: (select from a forum) Question:We used to have procelain string insulators in system where in pf and impulse withstand levels are defined per disc (like we use 5 disc in 33KV and 3 in 11KV)Now since silcone ruber insualtors is under proposal...

Casting iron products flow chart
                 Abstract: The chart of casting iron product manufacturing procedure...

Forging products flow chart
                Abstract: The chart of forging product manufacturing procedure...

Aluminum(or AL-alloy) products flow chart
                Abstract: The chart of aluminum product manufacturing procedure...

Malleable iron products flow chart

                Abstract: The chart of malleable iron product manufacturing procedure...


   

 
artical    
Mark on Porcelain Insulators
Author:TCI   time:2006-11-27 11:21:44  read:1445times

          Porcelain insulator markings help identify both the manufacturer and the date of manufacture.
  • Most porcelain insulators are incuse marked, that is, a stamp was used to impress the manufacturer’s logo into the leather hard clay prior to firing.
  • Older dry process insulators were sometimes embossed. Like with glass insulators, markings were engraved into the mold, and when pressed the letters would be raised on the insulator surface.  A number of earlier Ohio Brass styles are also embossed.  
  • Recessed-embossed insulators are a combination of both types -- raised letters against a depressed background. Ohio Brass was the primary user of this technique, with their "B inside the O" mark.  
  • Underglaze ink marked insulators are stamped with an ink pad prior to glazing. The glaze does not hide the mark completely, and so a permanent identification is made. This method is commonly used at present.  
  • Ink stamped insulators are stamped on the surface of the glaze after firing.  This is a relatively unusual marking technique. 
  • Sand-Blast markings have been used on some relatively modern multiparts and large uniparts. This mark is made by etching the glaze with a sandblaster through a stencil. 
  • Wax resist is an additional marking technique where wax or oil is applied in a pattern on the unglazed porcelain before glaze application. The wax keeps the glaze from sticking, leaving bare porcelain exposed in the desired lettering or pattern. The wax or oil evaporates during the glaze firing. This is a relatively uncommon marking technique that has been used on some non-North American porcelain and on some factory glaze tests. 

 (copy from the internet)

 
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