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  • Users: amptramp
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  1. amptramp

    NEC or IEC Standards and Indicator Lights

    Hello all, I am investigating the application of a "power on" indicator lamp for machine control. I am interested in any code references in any standard that explicity discusses the application. Specifically: 1) Is a "power on" indicator light required for machine control? 2) Is a "power...
  2. amptramp

    EU, UK Distribution Systems TT or TN

    Cheers All, Please forgive my lack of world travel! Is 230V 1[Φ] the most common distribution system for commercial/residential applications within the EU and UK? What is the prevalence of type TN and TT distribution systems in the EU and UK with respect to industrial, commercial, and...
  3. amptramp

    Multiple VFD's on Single Iso Transformer w/ GFCI

    Hello all, The application consists of four 1/2HP 115V 1[Φ] In / 230V 3[Φ] Out VFD's powering 1/2HP gearmotors that drive simple conveyors. The conveyors are dual narrow urethane V-belts riding on steel guides carrying egg flats. The VFD's will be loaded at approximately 75%. The...
  4. amptramp

    Tektronix: Introducing Scope Central

    Textronix has launched an interactive website dedicated to oscilloscope users with app notes, app videos, and live chats. You have to register, tone down your cynicism related to marketing ploys, and allow certain JavaScripts. So far the site seems very cool. Follow the link below to register...
  5. amptramp

    Fanuc Karel or TPP Programming Information Wanted

    Does anyone know of any Web sources of information on Fanuc Karel programming, Fanuc Touch Pendant programming, or Fanuc Robotics in general? Fanuc will not allow access to their online information without an account.
  6. amptramp

    Understanding Const. Tq, Var Tq, & Const. HP Induction motors

    I am familiar with constant torque, variable torque, and constant horsepower loads. It has been brought to my attention there are constant torque, variable torque, and constant horsepower induction motors. These motor designs seem to be associated with multispeed motors and consequent pole...
  7. amptramp

    What happened to thread on Centrifuagal Pumps and head squared

    Where did the thread go on the discussion of centrifugal pump head versus the rotational speed squared. I started the thread and hate to lose it because there was good info contained within.
  8. amptramp

    Positive Displacement Pump Modeling

    I am attempting a network analysis of a fuel oil delivery system. I am using a set of Q-equations (continuity equations and work-energy equations) to model the pipe network flow characteristics. The pump in the network is a triple screw pump. Although I understand how to model a centrifugal...
  9. amptramp

    Migration from AutoCAD to Solidworks - Warranted??

    My company recently hired an engineering manager who is convinced we should migrate from AutoCAD to Solidworks (2D to 3D). He believes we will be more efficient and produce better designs. We are an OEM who manufactures automated brick handling machinery, material handling systems (conveyors...
  10. amptramp

    Aluminum busbar ampacity tables

    Does anyone know where I can find (on the Internet) ampacity tables for aluminum busbar?

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