Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations KootK 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. EEbyChoice

    Generator Megger Testing

    Clarification. This is a Skid mounted generator set designed to be housed in some type of container or building. Thanks for the replies. I apprceciate your feedback!
  2. EEbyChoice

    Generator Megger Testing

    I am installing a new 480 Volt, 1825 KW standby generator (its predecessor suffered a generator bearing failure during an extended run). The new unit sat outside at the dealer for a couple of weeks in almost constant rain/wind and high humidity. It was wrapped in plastic sheeting for part of...
  3. EEbyChoice

    RSLinx Ethernet comm issues

    I am using RSLinx V2.42.00 to communicate over a WAN to 32 remote PLC's. These are Micrologix 1200 and Micrologix 1500 PLC's with 1761-NET-ENI modules being used to provide the ethernet interface. Is there a maximum number of OPC topics that can be configured within RSLinx? Somewhere I heard...
  4. EEbyChoice

    NFPA 70E Battery Requirements

    Thank you for the many responses to my original question. One last issue that you may be able to help with. Can anyone direct me to a copy of the IEEE 1584 standard, or at least the section that shows that it applies only to AC. Not trying to circumvent copyright laws, but I don't need the...
  5. EEbyChoice

    Battery Help

    You need 15 volts and 3 amps, but for how long? This will determine in large part how large your battery pack needs to be. You need to figure out the desired amp hour rating of your application. 15 amps @ 3 volts is 45 watts. If it needs to run for an hour, then you need a 3 amp hour...
  6. EEbyChoice

    NFPA 70E Battery Requirements

    dpc - I agree with your train of thought, however, the 20 cal/cm2 requirement wasn't taken from article 320. Our engineer used the incident energy calculation taken from Annex D, paragraph D.8.3. This calculation does not specify a minimum application voltage. If you plug in the available...
  7. EEbyChoice

    NFPA 70E Battery Requirements

    We operate a fleet of diesel generators. Most of these generators utilize two 12 Volt batteries in series to provide 24 VDC starting power at approximately 400 Amps continuous cranking current. The batteries are rated at 190 Amp Hours (20 hour rating) with 1300 cold cranking amps. We recently...
  8. EEbyChoice

    LV and MV Cable Testing

    Thank you to all for this information. There are several good links to other information contained in these replies and it is definitely worth checking them out. Bottom line for me is that there is still some debate regarding the type of testing that is most effective for Medium Voltage cables...
  9. EEbyChoice

    LV and MV Cable Testing

    Thanks for the information on IEEE 400. I have read through this document and there is good information to be found. Below is a specific case of what I am working with: Currently, we are testing 5KV cables terminated at one end in the generator (4160 VAC) and at the other end in switchgear...
  10. EEbyChoice

    LV and MV Cable Testing

    I have quite a few on-site backup power generation facilities (located at customer sites, commercial and industrial)ranging in size from 16 MW down to 350 KW. Age ranges are from 3 years to 12 years or maybe a little older. I am trying to establish an electrical preventative/predictive...

Part and Inventory Search