First sem electrical engineering lab manuals
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Now, vary both the resistive and inductive load to obtain different readings of ammeters A 1 , A 2 and A 3 and voltmeters V 1 , V 2 and V 3. C supply, close the switch and vary the rheostat to obtain different voltage and current values. The load on motor must be released initially. To find the regulation of a 3 — ɸ alternator by using synchronous impedance method. C Ammeter - 1 nos. To obtain the performance curves for the same. To measure single phase power by using three ammeter method.

To measure three phase power by using two wattmeter method. C supply, close the switch and vary the rheostat to obtain different voltage and current values. To study the V-I characteristics of an incandescent lamp. Repeat the same procedure for different observations. Now, adjust both the rheostat and inductive load to obtain different values of then take V 1 , V 2 and V 3.

Remove the fuse carriers before wiring and start wiring as per the circuit diagram. The plots of Efficiency vs Output Power, Torque vs Output Power, Line Current vs Output Power and Speed vs Output Power are plotted in the same graph sheet and also the Speed vs Torque response is plotted in a separate graph sheet. Switch of supply then open the switch. To study the V-I characteristics of an incandescent lamp. To perform open circuit test on a single phase transformer. C Circuit Diagram: Theory: Procedure: 1. C Circuit Diagram: Theory: Procedure: 1.

Connect the circuit as shown in the diagram. Replace the fuse carriers with appropriate fuse wires after the circuit connections are checked by the Staff-in-charge. The above procedure is repeated until the motor is loaded to 120% of its rated current. Remove insulations from the connecting wire so as the current will flow properly. To measure the single phase power by using three voltmeter method. To perform short circuit test on a single phase transformer. First measure the least count of all ammeters A 1 , A 2 , and A 3 and all voltmeters V 1 , V 2 and V 3.

C Voltmeter - 3 nos. Repeat the same procedure for different observations. C Voltmeter - 3 nos. To measure single phase power by using three ammeter method. Note the readings of voltmeters and ammeters properly. To perform open circuit test on a single phase transformer.

C Voltmeter - 3 nos. Repeat the same procedure for different observations. . Remarks: The characteristic is non-linear. Remarks: The characteristic is non-linear. To measure three phase power by using two wattmeter method. To perform open circuit test on a single phase transformer.

Now, adjust both the rheostat and inductive load to obtain different values of then take V 1 , V 2 and V 3. Note the voltage and corresponding current values. After completing the experiment, calculate the Torque, Armature current, Input power, Output power and Efficiency using the formulae given. To measure single phase power by using three ammeter method. To measure the single phase power by using three voltmeter method.

To measure the single phase power by using three voltmeter method. Now, adjust both the rheostat and inductive load to obtain different values of then take V 1 , V 2 and V 3. Fuse calculations: As this is a load test, the required fuse ratings are 120% of the rated current of the motor. To measure the single phase power by using three voltmeter method. It has gotten 881 views and also has 0 rating. Repeat the same procedure for different observations. Now, vary both the resistive and inductive load to obtain different readings of ammeters A 1 , A 2 and A 3 and voltmeters V 1 , V 2 and V 3.

C Ammeter - 2 nos. The circuit connections are made as per the circuit diagram. To measure three phase power by using two wattmeter method. Variac: 230 V, 10 A, 50 Hz, 1-Phase 6. Now, vary both the resistive and inductive load to obtain different readings of ammeters A 1 , A 2 and A 3 and voltmeters V 1 , V 2 and V 3.

To perform short circuit test on a single phase transformer. Note the readings of voltmeters and ammeters properly. To perform open circuit test on a single phase transformer. C Voltmeter - 3 nos. Connect the circuit as shown in the diagram. Why V-I characteristics of incandescent lamp is nonlinear.