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  1. eaaf

    Surge Cap without Discharge Resitor for Motor Protection.

    Good Day. I have a question. I'm usign surge protection for the 4.16 Kv motors in our plant. Usign Surge Cap an LA's, near of the motor conections. I want to use an insulation meter, installed in the motor control, so we need to change the surge cap for another ones, that don't have the...
  2. eaaf

    Changing a GE MDP with a SR750

    Good Day. I want to change the source of power of a area of the plant where I work. Right now it is placed in a GE switchgear make in the 1997, which has a MDP (Digital Time Overcurrent Relay) make by GE, for the protection of the feeder with a capacity of 1200 amps at 4.16 KV. I want to move...
  3. eaaf

    Synchronous Motor as Reactive Power Source

    Hello. I have a 3000 KW Synchronous Motor. Made by KATO. I replace this motor with a wound rotor motor. I'm thinking to install the synchronous motor as a Reactive Power Source, in order to improve the PF. The plant is a big consumer, almost a 42 MW, The incoming has two transformers and its...
  4. eaaf

    PLC Interfacing using OPC in Visual Basic and RSLinx

    Hello Everyone. I'm using AB PLC for an application. I'm using RSLinx pro for the communication in the PC. I want to make an application in Visual Basic for Read and Write data in the PLC. Any one can help me with an example of code in VB6 to get access of the data using OPC. I'm already using...
  5. eaaf

    REF Trip on a 22 MW Transformer with OLTC

    Hi everyone. I have a 22 MW transformer 69KV to 4.16 KV Delta-Star resistance earthed, with a On Load Tap Changer. It has a SR745 Multilin Relay (GE) for protection. It had two Restricted Earth Fault trips on a month. I made the following test to the transformer in order to look for a...

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