NCEES problem #119 is asking for starting torque given that it is 150% of full load torque. The first line reads "An induction motor is rated at 1,000 hp, 1,165 rpm, 2.4 KV, 201 A, 3 phase, 60 Hz, 0.94 lagging power factor at full load."
Is there something I should be looking for to figure out what to use for Power? The answer uses the 1,000 hp to calculate full-load torque, but I seem to remember other places where you calculate full load power as P = sqrt(3) * V * I * PF even when given the full load hp.
The supplied answer insinuates that since it is torque, we only look at the mechanical properties which I assume means we look only at HP. Is that correct? And if so, does this only apply to torque, or other applications as well? I appreciate any clarification!
Is there something I should be looking for to figure out what to use for Power? The answer uses the 1,000 hp to calculate full-load torque, but I seem to remember other places where you calculate full load power as P = sqrt(3) * V * I * PF even when given the full load hp.
The supplied answer insinuates that since it is torque, we only look at the mechanical properties which I assume means we look only at HP. Is that correct? And if so, does this only apply to torque, or other applications as well? I appreciate any clarification!