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ganeshakce-electrical
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Grid Rotor Resistance Vs Liquid Rotor Resistance.

04/21/2011 8:24 AM

dear All,

What is the advantage of GRR over LRS. advise me

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JRaef
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United States - Member - New Member Engineering Fields - Power Engineering - New Member

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#1

Re: Grid Rotor Resistance Vs Liquid Rotor Resistance.

04/21/2011 9:18 AM

In a resistor grid system, you change resistance for the rotor in steps by shorting out various parts of the grid with contactors or step switches. So the resistance and therefore torque changes are stepped. With a liquid resistor it is infinitely variable, it accomplishes stepless change in torque.

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hien.nguyenquoc
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#2
In reply to #1

Re: Grid Rotor Resistance Vs Liquid Rotor Resistance.

04/21/2011 11:33 AM

GRR makes lot of noise and vibration during starting especially in HV application.

LRR needs a large space for electrolyte tank but give us a smooth start.

What else?

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