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  1. Hoxton

    Gas Turbine Generator Efficiency Calculation

    2.5% sorry
  2. Hoxton

    Short Circuit test on Sync Generator.

    Generator standards ((IEC etc) require them to be designed and constructed to withstand a sudden three phase short circuit across the generator terminals. This is the worst case they will see in service as downstream faults will not be as severa as the fault current will be limited by system...
  3. Hoxton

    Is it possible for un-proper sync cause differential trip on Generator

    Generator are not built or designed for faulty synchronizing
  4. Hoxton

    ISO rating of Generators / engines

    Well, the document should say The ISO rating standard for reciprocating internal combustion engines is ISO 3046; the standard for generating sets is ISO 8528 Both have several parts, 3046 is a core and satellite type standard: the corresponding definitions are in ISO 15550
  5. Hoxton

    Alternator stator winding failure

    I agree with cat serveng Base load sets like this should have closed air circuit generators. It is too late now to retrofit an external cooler. This is an engineering problems which must be managed. The electrical fault may not be the result of contamination... This time!
  6. Hoxton

    Alternator stator winding failure

    Contamination of generator or motor windings is never good! Get your local repair company to repair the winding, if there is no other damage. You need to agree a programme of removal of the generator on a regular basis for washout and baking (heating in an oven) etc. What was the duty...
  7. Hoxton

    Some of the worse designed engines?

    As a design concept the delicious is a star! If you look carefully at the moving diagram, the lower crankshaft rotates in the opposite direction to the other two! I I think that engines of this era suffered from poor detail design, compared with modern finite element methods etc.
  8. Hoxton

    Underexcitation limiters functionality when generatovoltage regulator is in Manual mode of operation

    Traditionally the manual mode was for commisioning and fault finding. One could put into manual mode if the auto section failed. There were the dangers as stated above. Nowadays we have reliable electronics and the need for manual mode is lessened. the is also the danger of unwary operators...
  9. Hoxton

    Gas Engine Governors (DEGOV - Typical Settings??)

    With modern turbocharged spark ignition gas engines, the load acceptance can be very poor compared to a direct injection compression ignition Diesel engine. Very often they come with a dedicated engine controller, and do not have a separate governor. Think of where the power comes from to...
  10. Hoxton

    Wastewater Explosion in UK

    MJCronin The water industry in the UK is pretty hot on health and safety and good design practice. They used to be nationalised (state owned) but were privatised in 1989. They still have common standards (WIMES) for electrical and mechanical systems: www.pumpcenter.com Could not find any...
  11. Hoxton

    Charging ports

    Follow ISO + IEC for a world standard
  12. Hoxton

    Diesel Generator Belly Tanks

    My reference to '1000 litres above was incorrect, it is a little off topic, but I thought that I would correct it. The requirement for a bund or drip tray comes in at 201 litres. I'm thinking of the older regulations.. I think that this is a common sense link to the capacity of a standard oil...
  13. Hoxton

    Diesel Generator Belly Tanks

    Belly tanks (aka baseplate tanks) are very common on smaller sets, due to trying to make use of all the space. It also enables any spills to be collected in the base of the enclosure. From memory, oi tanks of less than 1000 litres do not need to be bundled if the tank is a day tank and it is...
  14. Hoxton

    Diesel Generator Belly Tanks

    Diesel fuel can be returned hot to the tank. This is often 'surplus' fuel from the fuel injection system, and some engines use fuel to cool the injectors. This is returned to the 'day' tank (baseplate tank on smaller engines), and mixes with the existing fuel. Some engines have a small heat...
  15. Hoxton

    What happens with Stator Rewinds

    CuriousElectron In theory you could re-use the original copper. but getting all the old insulation off would be too many man-hours (too expensive), also you would have to repair any damage to the copper from the fault current. When I was involved in this some years ago, we often replaced the...
  16. Hoxton

    AVAT TEM EVO OPEN ACCESS CAT MWM

    Controllers like the TEM are very powerful, but operators are not able to change nearly all the parameters from the TEM Screen or remotely via the I/O. Operators can change a very few parameters, like date & time, and can reset faults. As Mike says, a USB dongle is required to access the TEM...
  17. Hoxton

    Diesel Gen AVR

    Sorry waross, but I beg to differ. A basic AVR will control the voltage in single running mode and can control the voltage droop when in parallel mode. In parallel mode there are two (of many) modes you do not want to enter: Over excitation – excess field current can overheat the rotor. Under...
  18. Hoxton

    Generator and Alternator kW and KVA Confusion

    Gas engines of that size are usually rated COP to ISO8528, i.e. continuous power with no overload.
  19. Hoxton

    Generator and Alternator kW and KVA Confusion

    Good idea, the genset data sheet will help
  20. Hoxton

    Generator and Alternator kW and KVA Confusion

    Your 'alternator' is really a 'current generator'. In actual fact an ‘alternating current generator’ (of course you can have a direct current generator). As dpc says, it is a kVA machine. The generator is given a power factor rating as that defines the mechanical design of the generator shaft...

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