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 MintJulep 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 r19h72

  1. r19h72

    measure available charge

    Hi nbucska, The only way to figure out the remaining charge is to discharge the battery and measure these amphours. This will give different results depending on the discharge current used. And that's one of the problems you face when trying to estimate the remaining charge. If the discharge...
  2. r19h72

    DC relays and contactors

    What DC contactor manufacturers do you know? coil: 24VDC or 48VDC rating: 100A, 200A, 400A at 24V/48V duty cycle: 100% I know so far: Albright (UK) Schaltbau München (GE) Tyco HARTMAN Aerospace Tyco KILOVAC Aorespace Trombetta+- (US) How would you rate their products? Which would you recommend?
  3. r19h72

    albright aux contacts not safe

    For dc contactors (relays) there is one big manufacturer: ALBRIGHT. These parts have many advantages I think - many AGV suppliers use them on their vehicles. But don't look for datasheets or something like that on the internet - there is nothing or better said nothing usefull. You can get these...
  4. r19h72

    IEC 92-305 Battery question

    Hi there, the thing is, that the nominal voltage of a battery is not as high as the charging-voltage. So if you charge your battery with the higher voltage, then you have to disconnect all devices that would be damaged by this higher voltage. For example: If you charge an 24V-block with 29V...
  5. r19h72

    LITHIUM-METAL-POLYMER BATTERIES

    Hi, I read something about that kind of batteries at www.avestor.com . For this is the manufacturers site the information about these batteries is extremly positive. Has Anyone tested such batteries? Could I use them for cyclic application (vehicle)? regards, ROMAN.
  6. r19h72

    Generator & Battery Bank Loading

    Battery: The rated capacity is linked to a given discharge-time, eg 5h, 10h, 20h. The longer the discharge-time, the higher is the rated capacity of the same battery. In general it's not wise to take out more than 80% of the available capacity of a lead-acid-battery, because of the risk of...
  7. r19h72

    Battery Cell Oil?

    Which kind of NiCd? Cells for handheld-devices, or big cells for UPS, or traction batteries? Usally you use oil for the poles of a Pb-Acid-battery. regards, ROMAN
  8. r19h72

    Mitigate Risk - Series/Parallel Battery Strings

    Hi Kasane, what is your application? Traction or stationary (UPS)? The problem with parallel strings is that single cell-voltages could drift apart. Depending on your application you should check the single cell-voltages regularly. regards Roman.
  9. r19h72

    good electrical cad package?

    There are some european CAE-packages (computer aided engineering) you could try: EPLAN 21 or EPLAN 5 www.eplan.de RUPLAN or ELCAD www.aucotec.de These packages are for professional use and not cheap. regards
  10. r19h72

    FAST ETHERNET CABLE LENGTH

    Hi, I'm currently using 10Mbit components for my industrial ethernet connections. For this solution I know the cable length limitation. I know hw to cascade Hubs. But how does this work with 100Mbit ethernet? Can I cascade the segments of the network when I use switches instead of hubs...
  11. r19h72

    Is token ring really dead?

    Yes I think so. As fast ethernet became more and more inexpensive many users (companies) changed to fast ethernet. The speed is much higher. I haven't seen a new Tokenring Installation since years. Roman.
  12. r19h72

    Contactor selection

    Hi bahram, the problem with dc is the missing zero-point. So if you break the line the current should find an alternative path to continue until it goes to zero. I hope that's the way you use the diode. A reduction-factor of 10 for the AC-rating of the contactor will then be save. hanness
  13. r19h72

    DEVICE NAMING IN WIRING DIAGRAMS

    I'm going to built an industrial machine. I've already found some rules for naming components. Example: 102FU = fuse in path 102 of the wiring diagram. But for some devices I didn't find anything. Is there a standard for this, or can I choose names as I like? I still need names for: Battery...
  14. r19h72

    CABLE NAMING

    I'm going to build an industrial machine. Different devices an the machine are connected together with cables. At the ends I mark the cables with source and target. That works as long as there are no additional plugs between the source and the target. So how do I have to mark the 2 cables that...
See more

Part and Inventory Search

Back
Top