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I have three phase motor and one phase lost so i want to connect the Driver to overcome this Problem .
if I use a capacitor to start up the motor I will loss percent of the Motor .
I want the answer with Details about how to calculate the load .
It is not recommended that three phase motor works on two phase, all modern softstarter or frequency drive has this protection integrated in its so it is not possible that motor works on two phase.
If can't use electronic starter than you can use relay for phase monitor which will shut down motor in case of phase loss.
i have no expertize in this.
looking with you for the answer
Well, In industry , if a phase is lost YOU SHOULD repair it. There is NO other solution with only tow phases.
For small motors, a capacitor can be used to function with tow phases, but the torque won't be the same as functionning with 3 phases.
thanks
sure for 3 phases motor and in critical situation you can convert it to be as single phase but note here that power will be less
the way is by connection one capacitor between 2 phases
the value of it depend on voltage, if 220V so for each horse power you need50 micro farad capacitor
please refer to below link for more clear
http://www.electrobrahim.com/2014/12/demarrage-un-moteur-triphase-en-monophase.html
Dear Mustafa. Your question is kind of confusing. If it is a three phase motor and you have lost one phase, it is not going to run. The protection is going to take it out of service until the time you get the third phase restored. In the event of one phase gone, you will be left with two third or 67% of load as you will have an open delta situation.I do not understand the Capacitor part which generally is used to improve power factor efficiency.
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