Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations waross 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 rterickson

  1. rterickson

    Triplex Cable vs 3 conductor cable

    A brief Google implies that IEEE 835 concerns itself with power cable as opposed to service cable. Back when I was doing factory QA on T&D cable, triplexed meant 3 individual power cables which were twisted together (triplexed) onto the customer's reel so that they could then be installed that...
  2. rterickson

    Weight of 230 kV Oil Circuit Breakers

    We've got some circa 1974 Westinghouse breakers that look similar. From the nameplate: WEIGHT WITH OIL: 68550# OIL PER TANK: 1680 GAL
  3. rterickson

    Energy Return on Energy Investment - Solar PV

    Real time numbers from the California Independent System Operator CAISO: Link AS OF 14:50 01/26/2018 24,194 MW Current demand 7,264 MW Current solar That's 30% solar.
  4. rterickson

    Bucket for 3 Phase Power?

    Concrete vibrator?
  5. rterickson

    Load break switches

    At the bottom of the S&C link you provided, there is a Product Literature tab. According to the descriptive bulletin for the Omni-Rupter, the expected life is ~500 full load operations,~2000 mechanical operations.
  6. rterickson

    Need for Transformer Instantaneous Overcurrent

    We also use a single differential with a separate overcurrent backup. SEL-501 and 551 relays are pretty inexpensive.
  7. rterickson

    Civil Engineer, Public Utility (Water) v.s. Pubic Works

    At some public agencies, the promotion from assistant engineer to associate engineer is a mere formality with the PE and 2 years experience. At others it can be a full-scale civil service ordeal.
  8. rterickson

    Home Inspection Transitioning to Lawsuit

    No direct experience with this, but I always assumed this was the reason why the 'Disclaimers' section of a home inspection report is always longer than the 'Findings' section.
  9. rterickson

    Civil Engineer, Public Utility (Water) v.s. Pubic Works

    Broadly speaking, a public utility is financed by revenue from selling its product (water), while public works will have to make do with whatever allocation it receives from city management. I'm sure some cities in SoCal do better during economic downturns than others do.
  10. rterickson

    550 kV vertical break disconnect switch

    I'd be interested in seeing a picture to see if the deflection of the insulators is obvious to the naked eye. I would NOT want to see one on my system! Southern States does not recommend mounting any type of disconnect switch vertically at 345 kV or higher.
  11. rterickson

    circuit switcher, circuit breaker

    As you noted, what we call a circuit switcher in North American looks a lot like what is called a live tank circuit breaker in other parts of the world. Both are capable of interrupting load and fault currents. The simplest form of a switcher is the “candlestick” model with vertically aligned...
  12. rterickson

    DMC Power - Swage Substation Bus Connectors Experience

    Central (inland) California, barely above sea level. Temps from +20 to 110F, no snow or ice, but occasionally light frost. I agree with jghrist, examination of a cross-cut joint would help with your comfort level as there is nothing to move when it's all mashed together.
  13. rterickson

    DMC Power - Swage Substation Bus Connectors Experience

    We have been using these connectors for the past 14 or so years, and we will never go back. The crews love them, and we were able to let the one guy who could do heliarc welding finally retire. We use it on everything from 12 kV to 230 kV. The powerheads and dies are a bit pricy, but I have...
  14. rterickson

    138 KV cap bank

    Southern States have some good literature on the website for their CapSwitcher line.

Part and Inventory Search