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!

Search results for query: *

  1. sonic02

    Differential protection for reducing arc-flash hazards

    Hi All...thank you for all your responses...
  2. sonic02

    Differential protection for reducing arc-flash hazards

    Hi there, Some of the traditional methods for reducing arc-flash is to have to bus differential protection for quicker tripping and at times reducing incident energy on the bus. Now, as far as I know, most of the electrical softwares (EasyPower, ETAP and SKM) allows you to model only...
  3. sonic02

    Current Limiting Reactor

    Hi there, What are the standard formulaes used in desiging an outdoor 44kV current limiting reactor in a substation. Downstream of the reactor is a solidly grounded 44/26kV, 10MVA distribution transformer. Happy if someone could refer me to a section of a book, IEEE or CSA standard? The...
  4. sonic02

    Capacitance Calculation

    Hi all, How do I calculate the capacitance for a oil-filled transformer and power factor correction capacitor bank. Any reference to texts or IEEE standards will be helpful. Thanks. Sonic 02
  5. sonic02

    Substation protection design

    Hi, Typically the requirements of the type of relays would be dependent on the Owner. They may have some standards preference for relays of a specific manufacturer. If it is older substation with no source of DC supply, it maybe using electromechanical relays. The protection design needs to...
  6. sonic02

    Switchgear Circuit Breakers

    Hi All, I'm adding four(4) new, 15kV metal-clad switchgear breakers to an existing line-up. I plan to utilize DC power for the tripping, closing, spring-charging and protective relay. Now, my concern is whether the existing battery cells have the adequate capacity (i.e. battery voltage)to...
  7. sonic02

    Standard for cable trench while crossing river or roads

    Hi Sanjay, Refer to Table 53 as well as Rule 12-012 Underground Installations Subrule(2)in CEC 2009. Hope that helps! Regards, Sonic02
  8. sonic02

    Standard for cable trench while crossing river or roads

    Hi Sanjay, The Canadian Code states that for direct buried cables in a trench , you will need a minimum of 1000mm of separation from the top of the conductor to the finished grade level for this voltage class. Now, if you have some form of mechanical protection (i.e. wooden planks) in your...
  9. sonic02

    Switchgear and Transformer Clearances/Location

    Hi cranky, Your points noted. Any other thoughts/comments anyone?
  10. sonic02

    Switchgear and Transformer Clearances/Location

    Hi All, First question: We have a new 500kVA, 13.8kV/600V dry-type ventilated transformer to be installed in a new electrical room. The dimensions of the electrical room is sufficient so real estate is not a concern here. My main concern would be the most ideal location of the transformer...
  11. sonic02

    DC or AC Spring Charging Motor

    I would go with a DC system for charging the breaker spring operating mechanism. A battery bank (eg 125Vdc, 60 cells) may be used to feed a DC panelboard which is being utilized to provide a DC supply for motor spring charging. sonic02
  12. sonic02

    ANSI MV Load Interrupter or Air Switch SWGR

    Hi there, There are certain considerations you will need before choosing the right switchgear or disconnect switch for your application. The primary function of the switchgear is to isolate faulty equipment, to reconfigure networks in order to restore power supplies, to divide large network...
  13. sonic02

    Surge Arrester

    Thank you all for the comments.
  14. sonic02

    Surge Arrester

    Hi All, We are planning of installing three(3)- single-phase,25kVA, 13.8kV/600V, pri- Delta and sec- wye-grounded pole-mounted transformer for our system. For protection on the primary-side of the transformer, I was wondering if I should spec out a self-protected transformer in which the surge...
  15. sonic02

    Cable Trench

    Hi there, Can you run 1kV,teck 90 3C#1 AWG power cable, a 4/0 AWG grounding conductor and Instrumentation Cables (in a 4" rigid PVC conduit) in the same trench as mechanical hot and cold water pipes? Sonic
  16. sonic02

    Outdoor Disconnect Switch

    Hi, I'm in Canada. The ratings (i.e continuous rating (900A) & mom.asymmetrical (40kA))for the 13.8 and 25kv outdoor disconnect switch is the same. I'm under the impression that a 25kV outdoor disconnect switch can be used on an exiting 13.8kV line but would just like to get some...
  17. sonic02

    Outdoor Disconnect Switch

    Hi there, A quick question on disconnect switch. Can we utilize a 25kv outdoor disconnect switch on an existing 13.8kV line ? I know that 13.8kV disconnect switch exists but the client had purchased a 25kv disconnect switch instead. Want some thoughts on that.. Sonic
  18. sonic02

    Arc-Flash Plenum

    Hi there, Out client has a arc-resistant 4.16kV Medium Voltage Motor Controller in a seperate electrical room which is located in a larger compressor room. This controller has a plenum at the top to direct any arc-flash to a safe or controlled environment. My question is with regards to the...
  19. sonic02

    5kV Teck 90 Cable in Rigid Steel Conduit

    Hi rcwilson, It is a 5kV TECK 90 3C-500MCM Non-Shielded cable. This cable has a total diameter of 2.78 inches (including the outer jacket). My concern is the cable bending of that cable in a rigid steel conduit underground (i.e. buried trench).
  20. sonic02

    5kV Teck 90 Cable in Rigid Steel Conduit

    Hi there, We are planning to install a 5kV TECK 90 Cable buried in a cable trench. One of the client requirements is that any cables buried in a cable trench in a vehicular area needs to be installed in a rigid steel conduit. Now, my question is whether a 5kV TECK 90 cable can be installed in...

Part and Inventory Search

Back
Top