Two single phase transformers are supplying a 400 kVA load at 220V. The parameters related to...
Two single phase transformers are supplying a 400 kVA load at 220V. The parameters related to each transformer give in the following: T1: , 250 kVA 120V/220 V T2: , 250 kVA 120V/220 V How much kVA each transformer has to supply. If the load becomes 550 kVA will any of the transformers be overloaded?
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Two single phase transformers are supplying a 400 kVA load at
220V. The parameters related to...
3. Two transformers rated at 250 kVA, 2.4 kV/600 V are connected in open-delta to supply...
3. Two transformers rated at 250 kVA, 2.4 kV/600 V are connected in open-delta to supply a load of 400 kVA a. Are the transformers overloaded? b. What is the maximum load the bank can carry on a continuous basis?
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye- delta on a 12.47 kv, 3-phase line. If the load is 450 kVA, calculate: a. The currents in the incoming a...
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye- delta on a 12.47 kv, 3-phase line. If the load is 450 kVA, calculate: a. The currents in the incoming and outgoing transmission lines b. The currents in the primary and secondary windings 1. sratod t 200 w 3o0 v/6oO V 60 Hz are used to raise the
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye-...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting thre...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting three single phase transformers in the Dynll vector group as shown in Fig.P1. The per phase equivalent circuit parameters on the high voltage side are: R1-0.72 Ω, Xi,-0.92 Ω, R2-0.70 Ω, Xp-0.90 Ω, R.-308.49 Ω, and X,,-44.61 Ω (a) Sketch the corresponding phasor diagram of the primary and secondary voltages for the Dynll vector group; lagging; terminal voltage is 415 V line to line, and...
3. Three single-phase, 10 kVA, 460/120 V, 60 Hz transformers are connected to form a three-phase...
3. Three single-phase, 10 kVA, 460/120 V, 60 Hz transformers are connected to form a three-phase 460/208 V transformer bank. The equivalent impedance of each transformer referred to HV side is 1.0 + j2.0 Ω. The transformer delivers 25 kW at 0.9 pf lagging at rated voltage. Answer the following questions: (a) Draw a schematic diagram showing the transformer connection. Draw three separate single-phase transformers and complete their primary and secondary connections. (b) Determine the magnitude of transformer primary and...
(a) Describe the tests carried out on a single-phase transformer to determine its equivalent circuit parameters...
(a) Describe the tests carried out on a single-phase transformer to determine its equivalent circuit parameters and explain how each parameter is determined based on the test results. (b) A 2200/220 V, 15 kVA, single phase transformer has the following equivalent circuit parameters: The HV winding resistance and leakage reactance are 0.2Ω and 0.3Ω respectively. The LV winding resistance and leakage reactance are 0.012Ω and 0.03 Ω respectively. The magnetic circuit resistance and reactance referred to the HV side are...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA at 0.8 p.f. lagging Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA...
A tie breaker is accidently closed that parallels three single phase transformers each rated 500 kVA...
A tie breaker is accidently closed that parallels three single phase transformers each rated 500 kVA connected delta primary wye secondary, with a three phase 1500 kVA transformer connected delta-delta. The equivalent impedance of the delta transformer is 0.056 at an angle of 58o. The equivalent impedance of the wye transformers is 0.022 at an angle of 58o. Both transformer have 12.47kV to 480V. All feeder breakers are open. Calculate the magnitude of the current circulating in each transformer secondary,...
2. In order to meet an emergency, three single-phase transformers rated 100 kVA (each), 13.2 kV/2.4...
2. In order to meet an emergency, three single-phase transformers rated 100 kVA (each), 13.2 kV/2.4 kV are connected in Y-∆ on a 3-phase, 20 kV line. a. What is the maximum load that can connected to the transformer bank? b. What is the outgoing line voltage?
A 75-kVA, 4900-250-V,50-Hz, single-phase transformer has the following parameters expressed in ohms: RLS = 0.005 ...
A 75-kVA, 4900-250-V,50-Hz, single-phase transformer has the following parameters expressed in ohms: RLS = 0.005 RHS = 2.477 RfeHS = 44,167 XLS = 0.0115 XHS = 4.8419 XMHS = 7,798.2 The transformer is operating in the step-down mode, delivering 70 % of the rated load at rated voltage and 0.98 p.f. lagging. Determine the magnitude of the input impedance of the combined transformer and load in Ohms.
clear and neat Problem 8 Two transformers rated at 250 k VA, 2.4 k V/ 1600...
clear and neat
Problem 8 Two transformers rated at 250 k VA, 2.4 k V/ 1600 V are connected in open delta to supply a load of 400 kVA a. Are the transformers overloaded? b. What is the maximum load the bank can carryon a continuous basis?
3. Two transformers rated at 250 kVA, 2.4 kV/600 V are connected in open-delta to supply a load of 400 kVA a. Are the transformers overloaded? b. What is the maximum load the bank can carry on a continuous basis?
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye- delta on a 12.47 kv, 3-phase line. If the load is 450 kVA, calculate: a. The currents in the incoming and outgoing transmission lines b. The currents in the primary and secondary windings 1. sratod t 200 w 3o0 v/6oO V 60 Hz are used to raise the
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye-...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting three single phase transformers in the Dynll vector group as shown in Fig.P1. The per phase equivalent circuit parameters on the high voltage side are: R1-0.72 Ω, Xi,-0.92 Ω, R2-0.70 Ω, Xp-0.90 Ω, R.-308.49 Ω, and X,,-44.61 Ω (a) Sketch the corresponding phasor diagram of the primary and secondary voltages for the Dynll vector group; lagging; terminal voltage is 415 V line to line, and...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA at 0.8 p.f. lagging Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA...
clear and neat
Problem 8 Two transformers rated at 250 k VA, 2.4 k V/ 1600 V are connected in open delta to supply a load of 400 kVA a. Are the transformers overloaded? b. What is the maximum load the bank can carryon a continuous basis?
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