As the motor is running at no load, the total input power is equal to the constant iron loss, friction, and windage losses of the motor. Since the power factor of the induction motor under no-load condition is generally less than 0.5, thus the Wattmeter reading of one of the Wattmeter will show a negative reading.
What is the purpose of no load test?
The open-circuit test, or no-load test, is one of the methods used in electrical engineering to determine the no-load impedance in the excitation branch of a transformer. The no load is represented by the open circuit, which is represented on the right side of the figure as the “hole” or incomplete part of the circuit.
What are the types of induction motor?
Types of Induction Motor: A Concise and Useful Guild
- Types of Single-Phase Induction Motors. Split Phase Induction Motors. 2&3. Capacitor Start and Capacitor Start Capacitor Run Induction Motors. …
- Types of Three-Phase Induction Motors. Squirrel Cage Induction Motor. Slip-ring or Wound Rotor Induction Motor.
What happens if fifth harmonics is given to induction motor?
What happens if fifth multiples of harmonics is given to induction motor? It will rotates in reverse direction.
Why LPF wattmeter is used in no load test of induction motor?
We use LPF only for no load test because at no load only reactive component of current flows in any machine. In 3 phase induction motor magnitude of reactive component current is more because of air gap. So power factor under no load operation is low and we use LPF wattmeter .
What does no load mean?
A no-load mutual fund means there will not be a sales charge when the investor buys the shares or when they sell their shares. While these funds do not charge a front or backload sales fee, they may make it up by charging other fees. …
How load testing is done?
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It’s called load testing, and you can use a tool like Load Testing Tool to get the job done. Load testing is the process of putting simulated demand on software, an application or website in a way that tests or demonstrates it’s behavior under various conditions.
What is the purpose of load test of induction motor?
The load test on induction motor is performed to compute its complete performance i.e. torque, slip, efficiency, power factor etc.