Note: voltage drop due to impedance at rated current expressed in a percentage of the rated voltage describes percentage impedance.
Answer-- (a)
The voltage drop due to impedance, at rated current, expressed in a percent of the rated...
1. From Figure 9-2 and the equations above choose which plot best describes the impedance due to: a. A Resistor b. A Capacitor PART 1: IMPEDANCE OF A CAPACITOR PREPARATION In an AC circuit capacitors and inductors have an effective resistance that restricts the flow of current, this is known as impedance. An equivalent to Ohm's law can be written where resistance R is replaced by the impedance Z: V = 12 (9-4) where V and I are either...
Two dc generators (A) and (B) with the following characteristics: Generator (A): rated voltage = 150 V, rated current = 30 Amp, and armature resistance = 0.4 Ω. Generator (B): no-load voltage = 160 V, rated current = 20 Amp, and armature resistance = 0.6 Ω. are connected in parallel. Find: a) Circulating no-load current and terminal voltage. b) The load current when generator B floating. c) The maximum possible load power.
ASSIGNMENT Develop the internal impedance model for the provided transformer, using appropriate short circuit and open circuit test at rated current and voltage respectively. The auxiliary transformer is a General Electric JE-27 auxiliary potential transformer rated 240-120Vac and thermal rating of 150VA Please provide the model results as follows: - Ohms referred to the 240V side Ohms referred to the 120V side - Per Unit based on the auxiliary transformer rating of 240- 120V and 150VA. ASSIGNMENT Develop the internal...
Calculate the (a) current flowing in the circuit below and (b) voltage drop across the resistor Ron the right. The temperature is 600K. The battery voltage is 5 V. The resistance R-1 Giga Ohm. The equation for current through the diode is 1" 18 9 (exp/Vd/(2*VT)) - 1) Amperes. Vd is the voltage drop across the diode and VT is thermal voltage. Do not forget that this is diode with 2 as shown in the equation above. (1 Giga -...
find the total resistance, total current, and current and voltage drop across each resistor 5o R22 Ry 680 RB R6 26cn find the total resistance, total current, and current and voltage drop across each resistor 5o R22 Ry 680 RB R6 26cn
solve Choose a current limiting resistor for an LED with a forward voltage drop of 2 V and a rated current of 34 mA. The LED will be powered from a 5 V supply
1. Calculate the VA output required from a current transformer of 5A rated secondary current when the burden consists of relays requiring 10VA at 5A plus a loop lead resistance of 0.8 ohms. 2. What output VA would be required from a current transformer of 1A rated secondary current for a burden of 10VA at 1A plus lead resistance as in part 1. 3. An earth fault relay has a burden of 1VA at setting and is set at 0.2A....
Problem 4 A synchronous generator rated 480V, 500kVA, 0.9pf, has a synchronous impedance of 160% on the generator base rating of 500kVA. The generator requires 5A of excitation current to maintain and open circuit voltage of 480V. If the generator is operating at 400k W at 0.9 p.fleading (delivering kVAR to the system), calculate the following assuming operated connected to a 480V infinite bus: (neglect internal resistance and losses) a) Armature current, I(a): (include magnitude and angle referenced to V(a)-277/0...
1.Rated voltage: DC12V; No-load speed: 250RPM; Rated torque: 5kg.cm; Rated Current: 870mA. Given the specification of the motors! 1) what power,current, and voltage should I supply to get the full torque? 2) If I am delivering only 6V and 220mA, what will be the speed and torque ? 3)If I have load of 2lb, what will be the speed and torque assuming that the voltage is 9V and 300mA?
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...