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  • Users: Wellyee
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  1. Wellyee

    Variable Voltage and Variable Frequency inverter circuit

    Hi all, I am looking for an inexpensive way of producing 3 phase pure sine wave, variable voltage (0-220Vp-p) and variable frequency (40-100Hz)independent to each other, from a single phase supply. My thought was to use an off-the-shelf pure sine wave AC/AC UPS and modify the IGBT drive...
  2. Wellyee

    English Electric/GEC Measurements CT Test Blocks

    Hi Peoples, I am searching for a supplier that stocks the old English Electric protection relay test plugs. They plug into the English Electric panel mounted test socket which isolates relay circuits from the field to allow secondary injection protection relay testing. The original installation...

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