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  • Users: emiluz
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  1. emiluz

    rectifier block, and surge supressor

    how do I test a rectifier block of a genset? How about the surge supressor? How do I know if they are deffective or not?
  2. emiluz

    VR6 caterpillar voltage regulator...

    just to make things clear... 1. I never had a chance to measure the voltage before the CPT.the 600Vac that I was talking about is the voltage being displayed in the output voltage of the generator pannel. 2. We used 2 CPT connected open delta. and the unbalance low voltage that I am talking...
  3. emiluz

    VR6 caterpillar voltage regulator...

    Thanks for the reply sir,ok to give you a final hint.... 1. When the exciter stator is not connected to the F1, F2 the sensing voltage terminals reads... up to 12Vac, and the F1 F2 reads....48Vdc. 2. When I connect the exciter stator to F1 F2, the generator starts to build up voltage and goes as...
  4. emiluz

    VR6 caterpillar voltage regulator...

    I have a new findings... I have compared the output of our other genset to the defective one, and notice that when the exciter fied winding is not connected to the F1 and F2 terminals, it normally measures 35 Vdc, but when I connect the leads to the terminal, the voltage is generated and later...
  5. emiluz

    VR6 caterpillar voltage regulator...

    without connection to the CT and the external droop adjustment, and the only terminals connected are the PMG, and sensing voltage. results and output. 1. Voltage across terminals of the PMG(AVR terminals) is 91,91.3,91.1 Vac respectively. 2. Voltage across termina(AVR Terminals)is of the sensing...
  6. emiluz

    VR6 caterpillar voltage regulator...

    is it ok to use CPT for instead of a PT to convert the sensing to the rated voltage of the AVR? I encountered a problem recently upon testing of one of the service unit provided by the contractor. case 1. Its a VR6 I think, so they use a CPT instead of PT to step down the voltage to 240V. The...
  7. emiluz

    voltage regulation of genset

    waht is the relationship between the sensing voltage and the voltage from the PMG in a Voltage regulator. which is the supply? the PMG or the sensing?how does the PMG system works?
  8. emiluz

    VR6 caterpillar voltage regulator...

    Im a bit confused, how come the technician came to the conclusion that the exciter field winding is defective. How do I know if its really defective or not aside from measuring its resistance. my main problem is, all the wiring was installed including the PMG but the technician told me that the...
  9. emiluz

    PT and CT

    What is the difference between a potential transformer and a control transformer?Can CT be used instead of a PT?
  10. emiluz

    VR6 caterpillar voltage regulator...

    I got a brand new VR3 voltage regulator,but when I installed it,there is no output on the terminal for the excitation voltage. the technician said that it could be a problem with my excitation field winding....is that posible...I was just wondering, the excitation ouput is an output from the...
  11. emiluz

    Combustible Gases in Oil Immersed Tranformer

    Any one knows where can I download, the specific data for the allowable amount of combustible gas in oil immersed substation transformer. I want to know the standard or the allowable quantities of such gases. I have a 3MVA transformer, using R-temp oil. In case I have failed the quantity...
  12. emiluz

    voltage regulation of genset

    What is the advantage of having a PMG than just getting the supply of the regulator from the stator winding? How does the voltage regulator work for a PMG operated Genset?
  13. emiluz

    VR6 caterpillar voltage regulator...

    some are offering me an alternative AVR, but they are not going to use our PMG Is that ok? What will be the consequences if im not going to use our PMG?
  14. emiluz

    VR6 caterpillar voltage regulator...

    what capacity of PT should I use for my VR6? If my computation serves me right, my sensing voltage fuse rating is 10 amps, and the sensing voltage is 480, does that mean that I have to use 5KVA or more PT? Anybody knows where can I purchase a replacement for my VR3 here in the philippines.
  15. emiluz

    VR6 caterpillar voltage regulator...

    tnx genSwgEng...its a good help,is there a way I can use it in replacement of my old VR3....the sensing voltage is diferent, but I believe CAt does not have the VR3 on their stock thats why they gave me VR6 instead...thanks again man for the sensible reply
  16. emiluz

    VR6 caterpillar voltage regulator...

    where can I download installation diagram of my VR6. We used to have VR3, there are some terminal tags that doesnt mach the VR6....please help me.

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