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  • Users: koruma
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  1. koruma

    BUTTWELDING ASTM B 498 WIRE

    Hi I need to butt-weld galvanized steel wire...does anybody knows how can I restore the zinc coat in the welded joint to its original specifications? the wire is ASTM B 498 galvanized steel wire.
  2. koruma

    NUM 720 F Controller

    Hi, I hope somebody can help me, I have one glass-cutting table controlled by a NUM 720 F numeric controller, the controller sends this message: PARAMETER TABLE CHECKSUM ERROR How can I correct this? is there any technical informations about this controller?
  3. koruma

    UNKNOWN COMPONENT

    Can anyone help me to identify this component?: Si VN 0660 9246 It's a three terminal device in a TO-92 package. Thanks for your help!!
  4. koruma

    MITSUBISHI DBA-2Z HV FUSE

    Hi, I hope anyone can help me with this...I need to replace a Mitsubishi DBA-2Z type fuse with 72.5KV/ 40 A rating, I don"t find this in the local market...is this type discontinued?, is there an exact replacement? Thanks a lot for your help!
  5. koruma

    westinghouse parts

    Can someone tell me where can i purchase the following parts? -Westinghouse Kilovoltmeter type KA-231, style 290B900A12 Scale 0-15 KV. -Westinghouse Speed control switch NP677C524H14 Thanks!
  6. koruma

    induced heating in switchboards

    In the company where I work we are designing a switchboard that has a busbar for a current of 5000 A (AC); due to the physical design, the three phases are enclosed by a frame of sheet iron, and neutral and earth are outside this frame. Since this design can produce heating in the iron...
  7. koruma

    P620 OPTOCOUPLER

    I NEED TO IDENTIFY AN ELECTRONIC DEVICE, IT IS MARKED "P620" AND IS PACKAGED AS A 4 PIN DIP, I THINK IT IS SOME KIND OF OPTOCOUPLER, CAN ANYONE TELL ME WHAT IS IT AND WHERE CAN I FIND ITS DATASHEET?,THANK YOU!
  8. koruma

    Overcompensation of asynchronous motors

    Can overcompensation of an asynchronous motor cause its power factor correction capacitor to explode because of the voltage rise?
  9. koruma

    Damage in MT capacitors

    Six months ago we installed in our factory some power factor correction capacitors for 2.3 KV motors and they have been operating properly since then, but, recently we installed one capacitor of 160 KVAR, 2.3 KV for power factor correction of a 625 HP, 2.3 KV, 890 rpm motor, at first power up...
  10. koruma

    No load current of asynchronous motors

    What percentage of full load current is considered normal for no load conditions in squirrel cage induction motors?
  11. koruma

    ELECTROLESS SILVER PLATING OF COPPER

    I need to silver plate copper busbars, I know there is a chemical ( not electrolytical) method for doing this involving NO3Ag and steel wool, butI dont know the details, can anyone help me?
  12. koruma

    SILVER PLATING BUSBARS

    CAN ANYONE TELL ME A METHOD FOR SILVER ELECTROPLATING COPPER BUSBARS, I NEED A CHEMICAL PROCESS, NOT AN ELECTROLYTICAL ONE.

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