What simple test can be performed before connecting two generators in parallel to determine if no serious short circuit will occur?
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What simple test can be performed before connecting two generators in parallel to determine if no...
Explain the time constant in simple RC circuit? What happens to charging time when connecting more capacitors in serial with the circuit? What happens to charging time when connecting more capacitors in parallel with the circuit?
raw the combined series-parallel circuit as a simple circuit. Determine & include on Simple Circuit Schematic: Vi. I. Ry&P A series-parallel combination circuit (100 )(2SO)--11.43A oor 2S0 250 ? 350 ? R3 R, 200 ? 12 3 sor 2oo
Question 16 (1 point) Capacitor 8: How were you supposed to discharge the capacitors before connecting the power supply to the circuit with capacitances in parallel? By connecting all the capacitors directly to the voltmeter By unplugging them, then reconnecting them one by one By connecting together the two ends of the capacitor with another wire, one capacitor at a time. By using the black box
QUESTION 2. (a) A portion of a power system consists of two generators in parallel, connected to a step-up transformer that links them with a 220-kV transmission line. The ratings of these components are as shown below: Generator GI: 10 MVA, 12 percent reactance Generator G2: 5 MVA, 8 percent reactance Transformer: 15 MVA, 6 percent reactance Transmission line: (4+j60) 22, 220kV where the percent reactances are computed on the basis of individual component ratings. Draw the per-unit impedance diagram...
6. Two identical 15 kV generators are to be connected in parallel. Both are running at rated speed and voltage. There is an open three pole 6-terminal single-throw fused switch between them, connected to the generator terminals (a1, b1.c1) and (a2,b2,c2) on each side, respectively. a1 b1 c1 = a2 b2 c2 Before we close the switch, we check the voltage across phase a with an ac voltmeter and find that Va1 Va2 = 0. With an oscilloscope, we display...
4.82 A rectifier" circuit is made by connecting two square-law devices in parallel, as shown in Fig. P4.82. One device has parameters A)-0.5 mA/V2 and VTR ov, the other A2 1.0 mA/V2 and VTR 0V. A sym metric input consisting of a :5-V square wave is applied to the rectifier, and a resistor RL 1 kS2 is connected as the load. (a) Plot the output voltage versus time. (b) Show that device asymmetry causes the output volt- age to have...
A single-phase transformer rated 1.2kV/120V, 7.2kVA yields the following results: Open circuit test (performed on secondary side): V2=120V I2=1.2A W2=40W Short circuit test (performed on primary side): V1=20V I1=6A W1=36W Determine: i. ii. iii. The equivalent circuit referred to primary side The equivalent circuit referred to secondary side Efficiency of transformer when it delivers 6kVA at 120V and 0.9pf
3. The following measurements have been performed through the open-circuit test of a 15 kVA, 2300/230 V transformer: Voc 2300 V,loc 0.21 A, Poc 50 W, What parameters can be calculated through the open-circuit test of a transformer? Calculate the parameter values from the given data. (The equivalent circuit of a transformer is very similar to that of the induction motor shown above. The only differences are that there is no slip term's' and there is a resistance Rc representing...
Choose two of the following tests/equipment below, tell us what test(s) can be performed and provide written instructions on how to operate and maintain the equipment. Hemoglobin A1-c Hemocue Glucose Cholestech LDX Be sure to include the following information and instructions in your submission: The equipment you chose performing control checks performing the test and explain what this test checks for and why required maintenance expected test values (normal-abnormal) range
Figure 1 shows two generators supplying in parallel a load of 2.8 MW at 0.8 pf lagging: (a) At what frequency is the system operating and what is the load supplied by each generator? (b) If the load is now increased by 1 MW, what will be the new frequency and the load sharing? (c) In part (b) which should be the set point of G2 for the system frequency to be 50 Hz? What would be the load sharing...