Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by climb1

  1. climb1

    UHV and EHV circuit breaker

    thank you for the information. it is most helpful.
  2. climb1

    UHV and EHV circuit breaker

    Having a debate; Is there a difference between pre-insertion resistors and closing resistors in circuit breakers? It seems as though most manufacturers are relying more on switch sync devices instead of any mechanical resistors (pre-insertion or closing) for 345 and 500 breakers. Without...
  3. climb1

    breaker test set recommendation

    my opinion: kocos actas may be called a portable set up, but it takes quite a bit of equipment. another issue is that it is complex and not as easy, as the others mentioned, to learn. it can perform a dynamic resistance, which i think is very helpful from a field perspective especially on a cap...
  4. climb1

    Circuit Breaker testing

    PD testing is not mandatory for production testing, yet. i agree that it is not good as a type test. i have used measuring devices and found that they are not limited to PD, but also may tell if bolts are not torques properly. the PD measurements did not pick up until higher levels, above 80kv...
  5. climb1

    tin plating corrosion

    attached is the picture requested. only the vertical portion is tin plated. the rust on the bolts is a totally different story.http://files.engineering.com/getfile.aspx?folder=3188ce75-706c-4e3a-9850-12fe0dd78b73&file=DSCN0127_(2).JPG
  6. climb1

    tin plating corrosion

    this is a high voltage connection terminal. the suspect part had not yet been hooked up, so it had been exposed to elements in a matter for a couple of months.it is in louisiana, about an hour north of new orleans. no hurricanes this year. the part size is about 5in x 5in. all of your input is...
  7. climb1

    tin plating corrosion

    i have an aluminum block that is tin plated. starting to show signs of white corrosion. i have been told that it is normal for tin plating to show corrosion based on environmental conditions. two questions: 1. can anyone confirm or deny that tin plating can corrode? 2. is there an easy test, i...
  8. climb1

    Breaker loss of gas, Trip or no Trip

    from breaker side: most breakers will have significant damage to the interrupter if operated without any gas, if the leak is that big. what i have seen is a time delay on the low gas contacts, and if the breaker reaches third lock out stage before time delay closes, it will keep from tripping...
  9. climb1

    on site FAT

    to answer your question arevaengineer, yes it is a good idea. customers need to have their own baseline for maintenance. there are too many timing tools on the market to use the FAT report, i.e. different transducers produce slighty different timings.
  10. climb1

    Breaker Test Panel

    Hi jasonmuneton1, my experience is with a HV gas CB. it shows the operation of the breaker open and close contacts, resistance through the interruptor, travel curves of mechanism damping... let me know if there is something specific that you are looking for.
  11. climb1

    5kV motor starter failure

    davidbeach, pfr is for continuous current ratings - my bad. you are right with no DC offset.
  12. climb1

    5kV motor starter failure

    CT's have a power factor rating, most are 2. This means that the CT can handle 2 times the amount of current in the primary. Ex. if the 1200 is rated at 3, it would not saturate until 3600A. FYI... the PFR is dependant on the gage of wire used.
  13. climb1

    Hi-Pot Testing

    Melco001, that is the AC value. A test report with the CB should state the HP voltage. The manual should also state the DC, but I will get back to you.
  14. climb1

    Hi-Pot Testing

    HVCB is 1.8 times rated.
  15. climb1

    Recloser Vs Circuit Breaker

    samy81, regards treading on your thread. tem1234, i am not sure for the derating question in my experience that comes from oil breakers, but has no effect in the gas cb. a gas cb is designed to withstand the rated interruption. most cb's either have logic built in (most commonly an Agastat time...
See more

Part and Inventory Search

Back
Top