You have a three-phase Y-connected load where each branch consists of a 3 [W] resistor and a j4 [W] inductor connected in series. If the line-to-neutral voltage is 500 [V], the approximate total reactive power supplied to the three- phase load is:
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![You have a three-phase Y-connected load where each branch consists of a 3 [w] resistor and a j4 [W] inductor
connected in series. If the line-to-neutral voltage is 500 [V, the approximate total reactive power supplied to the three-
phase load is:](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5362cbea-9427-4b2b-99cb-57a208edd853%2F62e812f2-2861-4130-a4f7-6967ce1b7399%2F7cvlxzv_processed.jpeg&w=3840&q=75)
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- In a balanced system, the phasor sum of the line-to-line voltages and the phasor sum of the line-to-neutral voltages are always equal to zero. (a) False (b) TrueTwo balanced three-phase loads that are connected in parallel are fed by a three-phase line having a series impedance of (0.4j2.7) per phase. One of the loads absorbs 560 kVA at 0.707 power factor lagging, and the other 132 kW at unity power factor. The line-to-line voltage at the load end of the line is 2203V. Compute (a) the line-to-line voltage at the source end of the line. (b) the total real and reactive power losses in the three-phase line, and (c) the total three-phase real and reactive power supplied at the sending end of the line. Check that the total three-phase complex power delivered by the source equals the total three-phase comp lex power absorbed by the line and loads.Two balanced Y-connected loads, one drawing 10 kW at 0.8 power factor lagging and the other IS kW at 0.9 power factor leading, are connected in parallel and supplied by a balanced three-phase Y-connected, 480-V source. (a) Determine the source current. (b) If the load neutrals are connected to the source neutral by a zero-ohm neutral wire through an ammeter, what will the ammeter read?
- Three loads are connected in parallel across a single-phase source voltage of 240V(RMS). Load 1 absorbs 15 kW and 6.667 kvar; Load 2 absorbs 3 kVA at O.96PF leading; Load 3 absorbs 15 kW at unity power factor. Calculate the equivalent impedance, Z, for the three parallel loads, for two cases: (i) Series combination of R and X, and (ii) parallel combination of R and X.A three-phase line with an impedance of (0.2+j1.0)/ phase feeds three balanced three-phase loads connected in parallel. Load 1: Absorbs a total of 150 kW and 120 kvar. Load 2: Delta connected with an impedance of (150j48)/phase. Load 3: 120 kVA at 0.6 PF leading. If the line-to-neutral voltage at the load end of the line is 2000 v (rms), determine the magnitude of the line-to-line voltage at the source end of the line.Three identical impedances Z=3030 are connected in to a balanced three-phase 208-V source by three identical line conductors with impedance ZL=(0.8+j0.6) per line. (a) Calculate the line-to-line voltage at the load terminals. (b) Repeat part (a) when a s-connected capacitor bank with reactance (j60) per phase is connected in parallel with the load.
- A single-phase source is applied to a two-terminal, passive circuit with equivalent impedance Z=3.045, measured from the terminals. The source current is i(t)=22cos(t)kA. Determine the (a) instantaneous power, (b) real power, (c) reactive power delivered by the source, and (d) source power factor.It is stated that (i) balanced three-phase circuits can be solved in per unit on a per-phase basis after converting - load impedances to equivalent Y impedances. (ii) Base values can be selected either on a per-phase basis or on a three-phase basis. (a) Both statements are true. (b) Neither is true. (c) Only one of the above is true.A 600-V three-phase circuit has two balanced loads connected in parallel, one Δ impedance 90 ∠40 ° Ω and the other Y impedance 50 ∠30 ° Ω. Find the total current of the effective line and the total average power absorbed.
- In a balanced abc sequential, three-phase star-star connected system, the total power on the line is 650W. If VAN117/15 degrees Vrms, the load's power factor is 0.88(forward) and the line impedance is 1+j2ohm, what is the load impedance value? a)5+j1.78ohm b) 5-j1.78ohm c) 7-j3.08ohm d) 7+j3.78ohmA three-phase Δ-connected generator has an internal impedance of 9+j90 m Ω/ϕ. When the load is removed from the generator, the magnitude of the terminal voltage is 13,800 V. The generator feeds a Δconnected load through a transmission line with an impedance of 20+j180 m Ω/ϕ. The per-phase impedance of the load is 7.056+j3.417 Ω. Construct a single-phase equivalent circuit.A Y-Y three-phase system has a source of 380 V and a load of impedance of 6+j5 Ohm/phase through a transmission line of 2+j 1 Ohm/phase. Calculate complex power supplied by the source. C