×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Cleaning High Voltage Lightning Arresters

Cleaning High Voltage Lightning Arresters

Cleaning High Voltage Lightning Arresters

(OP)
I'm new to eng-tips and was just hoping for a little help on finding a link for cleaning High Voltage Lightning Arresters. Any info would be greatly appreciated.

RE: Cleaning High Voltage Lightning Arresters

Welcome to the forum, you need to be specific with your questions here, here is a general link to your general question. www.netaworld.org

You will find standards for maintenance of arrestors there. A more specific question will get you a more specific answer. There are some great minds with alot of experience here.

Scott Peterson
Training Manager
Power Plus Engineering
www.epowerplus.com

RE: Cleaning High Voltage Lightning Arresters

You need to be specific in your question.  Are you looking for cleaning methods, such as using Collinite No. 237 High Voltage insulator cleaner on de-energized and grounded equipment?
Or are you looking for methods of cleaning while the equipment is energized, such as corn cob blasting?

RE: Cleaning High Voltage Lightning Arresters

(OP)
Sorry for the non-specific question wbd and thank you for the response. I'm writing a generic Maintenance Policy Manual for the many power plants my company represents and I need to add some info about cleaning Transformer Lightning Arresters to our Transformer Maintenance section. I am having trouble finding info on any cleaning procedures for de-energized or energized equipment.

RE: Cleaning High Voltage Lightning Arresters

okay, basically the best way is to perform the cleaning with the equipment de-energized, LOTO and grounded.  You should clean the insulators/bushings/LA's with a high voltage insulator cleaner like Collinite 237, following the instructions on the can.  Not much to it.
I would also check the tightness of all connections, including the base bolts and look for signs of overheating.  If these are large LA's, they could be Doble testing at the same time the transformer and transformer bushings are.  The LA's on the transformers can be cleaned the same way the transformer bushings are.
Hope that helps.

RE: Cleaning High Voltage Lightning Arresters

If your arresters (or bushings) are very dirty you can use methanol or isopropyl alcool. I've seen guys using vinegar... Otherwise, use clean dry cotton rags to remove dust/dirt.

RE: Cleaning High Voltage Lightning Arresters

You need to restore the coating by using Colinite or my favorite, beaver butter.

For developing a RCM program you really should download the NETA MTS, it tells you how and when to conduct PM on power systems. You can also reference the 2006 NFPA 70B.

RE: Cleaning High Voltage Lightning Arresters

For the tuff dirt. I use collinite No 240 with a scotch brite pad, then buff with clean rag to a sparkleing waxed finish.
You can reach Collinite at 315-732-2282  (Happen to have can on my desk now)!

RE: Cleaning High Voltage Lightning Arresters

Surge arrester may be treated as an insulator for cleaning purpose. Below is a condensed information from IEEE Std 957-2005 for illustration purposes.
http://cuky2000.250free.com/Insulator_Cleaning_1.jpg
===========================================================

Check if the enclose test could guide you:

Describe your actions sequentially to restore the station (temporarily and permanently)

Inspect the potential device insulator for sing of flashover and other damage damages such as insulator puncture, crack in the porcelain, oil leak or any other physical damages

If not damage is found, proceed to clean the potential device with water followed by a wipe down with isopropyl alcohol to remove any dust or salt deposit.

After the cleaning, the system the system is ready to be restore and get the line back in service

For longer term, there are several options available to protect the potential device from flashover:

o    Water washing.
o    Surface coating such as silicon grease, high resistance glazing, hydrocarbon grease, room temperature vulcanizing (RTV), etc.
o    Install corona ring the made uniform the voltage distribution along insulator.
o    Replace the unit with higher-leakage insulator or no ceramic insulator unit.

Due to the variety of options and methods a study is recommended to determine include a live cycle cost of best protective action to maintaining the expected level of reliability and system availability.

=========================================================
The need for cleaning arrester/insulator depend on the frequency and risk level of flashover that is directly associaty with pollution level, contaminat deposit, environment conditions, lightning activity, overvoltage, creepage distance etc.

If there is severe problem of contamination/flashover, the enclose link may have application: http://www.doble.com/products/insulator_pollution_monitor.html

RE: Cleaning High Voltage Lightning Arresters

(OP)
Looks like some good information from all. Thank you everybody and if anyone else reads this thread and can add any thing else valueable please post it.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources