An electrical motor is supplied from a three-phase ,50 Hz, 410 V system on-board a LNG carrier .When connected in star , it takes a line current of 35 A at a power factor of 0.66 leading. The LNG carrier arrives at port and the motor is subsequently used for powering a container crane It is now connected in delta and is supplied on-shore .Determine for this motor when it takes 64 A at 310 V, from the on-shore supply: 2.1 The power factor of the motor 2.2 the frequency of the supply The motor is returned back to its initial supply and now connected with a new motor in parallel . The new motor is connected in delta and it takes 48.216 kVA at a power factor of 0.77597 lagging with a supply of 50 Hz, 410 V system. Determine for this new arrangement : 2.3 The power factor
An electrical motor is supplied from a three-phase ,50 Hz, 410 V system on-board a LNG carrier .When connected in star , it takes a line current of 35 A at a power factor of 0.66 leading. The LNG carrier arrives at port and the motor is subsequently used for powering a container crane It is now connected in delta and is supplied on-shore .Determine for this motor when it takes 64 A at 310 V, from the on-shore supply: 2.1 The power factor of the motor 2.2 the frequency of the supply The motor is returned back to its initial supply and now connected with a new motor in parallel . The new motor is connected in delta and it takes 48.216 kVA at a power factor of 0.77597 lagging with a supply of 50 Hz, 410 V system. Determine for this new arrangement : 2.3 The power factor 2.4 Apparent power taken 2.5 True power taken 2.6 Reactive power taken
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