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  • Users: Shaaban Emad
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  1. Shaaban Emad

    20KV cable splice

    Hi experts 20Kv cable joint was broke-down , now we are preparing to cut the damaged joint and fixing two new joints instead whereas no extra length in the cable. what is the minimum safe distance between the new to joints ?
  2. Shaaban Emad

    Calculate generator capacity

    Hello I need to calculate the 0.4k generator capacity needed to supply 6.6kv 250kw induction motor using 2.5MVA 0.4kv/6.6kv transformer with C.B .considering the in rich current of transformer and then the motor What is the expected starting currents ?
  3. Shaaban Emad

    tripping motor

    hello A 3ph 900kw 6.6kv 94A fire water pump.it has tripped when attempt to start by 50 and 51N protection (fault current 3500A, tripping time 0.05s ) The motor insulation is good and the rotor is free ,the CT was tested.it has re-set and start again it is consuming 60A. what would be the...

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