Load Test on 3 Phase Alternator

This article will focus on the AC type. Plot the graph between load terminal voltage and load current.

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The rotor is omitted for simplicity.

. Load test on three phase alternator using Virtual Labvirtuallab alternator loadtest. 8 Load test on 1-phase induction motor. Open Circuit Test on Three Phase Alternator 1 Close the DPST Double Pole Single Throw switch connecting the armature winding of DC shunt motor to supply.

1 Switch on the supply at no load condition. Load test on 3-Φ alternator resistive load 0-10a mi 10a 290Ω2a 0-600vmi 10a name plate details 10a v415v i65a 0-1amc 290Ω2a n1500rpm p11 kva exc. Note down the name plate details of motor and alternator 2.

Load Test on Three Phase Alternator - You can try with inductive and Capacitive type load. 5 Load test on 3-phase induction motor. 4 V and inverted V curve of synchronous motors.

Approx 280A 415V - The alternator manufacturer confirms that it is safe to load a 500kVA DG set to the extent of 300A on 2 legs with no current in one leg for a period of 8 hours. The Alternator is kept at rated voltage output and made to run at rated rpm from the DC motor. It is used to increase or decrease the stator voltage of DC shunt motor.

D Open the three resistance load switches for no load on the alternator and measure and record the no load E1 and I 2. Remember to check the motor speed and readjust to 1800 rmin if required. Open Circuit Characteristics of an alternator PROCEDURE Load Characteristics 1.

Supply fuse fuse - d p s t s f1 f2 synchronous. Vary the load in steps and note down the corresponding load current and. 9 No load and blocked rotor test on 1-phase induction motor.

If a single phase of a three-phase alternator is heavily loaded its voltage will be reduced due to the IR and IX L drops in the stator. There are AC output and 12v DC direct output types. Testing as shown you would use a single load.

Connect the circuit as shown in figure. The simplified schematic of figure 1 view A shows all the windings of each phase lumped together as one winding. Step1 to 6 is repeated till the ammeter shows the rated current of 3-phase induction motor.

The Three phase resistive load is connected to the Alternator output terminals with the load switches in off condition. By increasing the load step by step the reading of ammeter voltmeter and wattmeter 7. 220v 11a fuse rating 125 of rated current 125100 x 6510a 10a 220 v dc.

The DPST is closed on supply side. The Effect of Load Changes on a Synchronous Generator Operating Alone. Set the resistive load knob at it off position.

7 Separation of losses in three-phase induction motor. - The testing load is actually 130 kVA which is the full load loss of the transformer under test. Connections are given as per circuit diagram.

LOAD TEST ON THREE PHASE INDUCTION MOTOR AIM. The three-phase alternator as shown in this schematic is made up of three single-phase. Procedure to conduct a load test on 3 phase alternator in a virtual laboratory Electrical machines Virtual Lab.

The voltage waveforms generated across each phase are drawn on a graph phase-displaced 120º from each other. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube works Test new features Press Copyright Contact us Creators. LOAD TEST ON THREE PHASE ALTERNATOR 1.

Browse discover thousands of brands. Testing a 3 Phase alternator Stator Engine and key off static test. The alternator is brought to Rated speed by varying motor.

System is being exclusively used for generation transmission and distribution of power. Couple the Synchronous motor with Squirrel cage induction motor by belt. There are either 3 wire or two wire systems and the tests will be.

Using three point starter the motor is started. Read customer reviews find best sellers. But the type testing involves 2 hours of 150 loading ie.

2 Apply the rotor voltage to the motor using the variac and note down the readings at ammeter And wattmeter. Hello all This video is about Experiment of load test on the three phase alternatorI have done this experiment in virtual lab045 Aim and theory239 Proce. Testing only three phase delta you would use three loads all wired phase to phase.

Adjust the dc excitation of the alternator until the output voltage E1 208 Vac. B Compute Torque Output power Input power Efficiency Input power factor and Slip for every load setting and to determine how speed efficiency power factor stator current torque and slip of an induction motor vary with load. The machine which produces 3-phase power from mechanical power is called an alternator or synchronous generator.

A Perform load test on 3-phase induction motor. Supply d p s t s fuse fuse l1 l2 f a a1 a2 m f1 f2 - dc shunt motor a 220 v dc. Regulations on 3-phase salient pole alternator by Slip test.

These days 3-phase ac. Because the stator MMF has such a main effect on the magnetic flux the voltage regulation of alternators is fully poor and the dc field current must be continuously adjusted to keep the voltage constant under changeable load conditions. Measure and record the full load I 1 I 2.

Decrease the load bring auto-transformer to its minimum voltage position. 6 No load and blocked rotor test on 3-phase induction motor. If the alternator can be removed from the bike and disassembled you may also want to do a Megger test of the stator winding.

Set the voltage control knob at it full counter clockwise position. Rheostat is used as a potential divider. 3 Vary the load in suitable steps and note down all the meter readings till fill load condition.

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