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A small industrial plant has a 1okw heating load with unity power factor and a 20KVA...
An industrial customer is fined if the power factor of the plant falls below 0.85. The...
An industrial customer is fined if the power factor of the plant falls below 0.85. The equivalent loads of the plant are: 30 lamps of 400 W, an Electric Oven with an impedance of (2.4 + j3.2) and a load of 80 kW due to an engine block. The three charges are in parallel. Induction motors have a power factor of 0.8 and a performance of 0.98. The customer has a 600V, 60Hz supply. a) Calculate the average power...
A small factory has different types of loads which are grouped together as follows A) induction...
A small factory has different types of loads which are
grouped together as follows
A) induction motors : 1200 hp, 0.8 lag PF
B) Heating loads: 100kW at unity PF
A 3 phase synchronous motor is installed at the
factory to improve the factory's overall power factor. Calculate
how much reactively power per phase the synchronous motor must
supply to the system to maintain an overall power factor of 0.9
lagging. 1 hp = 0.746 kW
together as follows: a....
An industrial plant consisting primarily of induction motor loads absorbs 1200kW at 0.65 power factor lagging....
An industrial plant consisting primarily of induction motor loads absorbs 1200kW at 0.65 power factor lagging. Compute the required kVA rating of a shunt capacitor to improve the power factor to 0.95 leading.
A generating station supplies power to the following : (i) a lighting load of 100 kW;...
A generating station supplies power to the following : (i) a lighting load of 100 kW; (ii) an induction motor 800 h.p. (596·8 kW) p.f. 0·8 lagging, efficiency 92%; (iii) a rotary converter giving 150 A at 400 V at an efficiency of 0·95. What must be the power factor of the rotary convertor in order that power factor of the supply station may become unity ?
please answer 13.16 at rated load of unity power factor and rated terminal voltage, determine efficienc...
please answer 13.16
at rated load of unity power factor and rated terminal voltage, determine efficienc including field rheostat loss. Ans. 93.139 13.11 A generator under test is rated at 100 KVA, 3-phase, 60-Hz; 2,400 volts. (a) If driven b a de motor unexcited, the motor output is 1.26 KW. (b) If driven by a de motor, generato on open circuit and excited to generate rated potential, the motor output is 2.5 KW. ( Ifdriven by a de motor, generator...
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system supplies a 20 kVA, three-phase induction motor load at a power factor of 0 8 lagging, and a star-connected set of...
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system supplies a 20 kVA, three-phase induction motor load at a power factor of 0 8 lagging, and a star-connected set of impedances, each having a resistance of 10 Ω and an inductive reactance of 8 Ω Calculate the capacitance of delta-connected capacitors required to improve the overalil power factor to 0 95 lagging [14] TOTAL 1001
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At st...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At start-up, the motor develops 1.9 times the full load developed torque but draws 7.5 times the rated current at the rated voltage. This motor is to be started with an auto- transformer reduced-voltage starter. Assume the stator resistance and the stator core loss to be negligible. Calculate...
A small factory has different types of loads which are
grouped together as follows
A) induction motors : 1200 hp, 0.8 lag PF
B) Heating loads: 100kW at unity PF
A 3 phase synchronous motor is installed at the
factory to improve the factory's overall power factor. Calculate
how much reactively power per phase the synchronous motor must
supply to the system to maintain an overall power factor of 0.9
lagging. 1 hp = 0.746 kW
together as follows: a....
please answer 13.16
at rated load of unity power factor and rated terminal voltage, determine efficienc including field rheostat loss. Ans. 93.139 13.11 A generator under test is rated at 100 KVA, 3-phase, 60-Hz; 2,400 volts. (a) If driven b a de motor unexcited, the motor output is 1.26 KW. (b) If driven by a de motor, generato on open circuit and excited to generate rated potential, the motor output is 2.5 KW. ( Ifdriven by a de motor, generator...
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system supplies a 20 kVA, three-phase induction motor load at a power factor of 0 8 lagging, and a star-connected set of impedances, each having a resistance of 10 Ω and an inductive reactance of 8 Ω Calculate the capacitance of delta-connected capacitors required to improve the overalil power factor to 0 95 lagging [14] TOTAL 1001
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At start-up, the motor develops 1.9 times the full load developed torque but draws 7.5 times the rated current at the rated voltage. This motor is to be started with an auto- transformer reduced-voltage starter. Assume the stator resistance and the stator core loss to be negligible. Calculate...
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