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  1. vivekgupta999

    High frequency relay instead of 50/60Hz relays.

    We have a Induction furnace, in which we have earth fault relay with 250/5Amp CT with 500Hz supply. Because furnace power is of high frequency,relay used is 10Khz. Normally we use 50/60Hz operating signal for relays. We want new relay as old one is bad. I am not able to get supplier of this type...
  2. vivekgupta999

    Earth Fault Relay 5A,10Khz required

    We have a Induction furnace, in which we have earth fault relay with 250/5Amp CT. Because furnace power is of high frequency,relay used is 10Khz. Normally we use 50/60Hz operating signal for relays. We want new relay as old one is bad. I am not able to get supplier of this type of relay with...
  3. vivekgupta999

    Following Capacitor Required

    We need following capacitors urgently for our MF converter of Induction furnace. 1) Capacitor 0.25 micro Farad +/- 8%, 1000V, 50 milli ampere. Original Make - Siemens, Size- Height- 58mm & Dia- 24mm. Ref 0.1/1000GI, Aluminium cashing with bottom stud fixing, stud thread dia 7mm & stud lenght...
  4. vivekgupta999

    Why some Capacitor rating in milliampere

    I have a one inverter circuit in which capacitor are rated like this, 0.25 Microfarad,1000V & 50 Milliampere. They are connected in parallel with thyristors. I am not able to understand why capacitor ampere rating is given? What its significant? Can I use 0.25microfarad & 1000V capacitor without...
  5. vivekgupta999

    Ignitron equvalent & Induction furnace Converters

    We have old Induction Furnace (Make KORF)of 2ton. It is having static frequency converter of 1300Kw with input of 700V & 50 Hz & output is variable voltage & maximum frequency of 500Hz. In frequency converter there is one pre current device which is having Ignitron (Mercury arch rectifier) to...

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