What is load test on DC series generator?
The load test is conducted to draw internal and external characteristics. The load circuit diagram is shown in the figure below. To know the values of voltage generated with respect to the load current in order to draw the curves vary the input voltage to the rated value and note the respective values.
What is the use of DC series generator?
They are used for general lighting. They are used to charge battery because they can be made to give constant output voltage. They are used for giving the excitation to the alternators. They are also used for small power supply (such as a portable generator).
What are the applications of DC series generator?
Applications of DC Generators
- These generators are used to charge batteries, provide lighting and provide excitation to alternators.
- They are used to provide field excitation current for regenerative braking in DC locomotives.
- They are used in DC motors where speed control is necessary.
How do you test if a generator is working?
Put the generator’s choke at the START or halfway position. Flip the generator’s power switch to ON or turn the key in the ignition switch to the ON position. Pull the recoil cord if your generator has one to actually start the engine. If your generator does not start, double-check that the fuel line is open.
How do you conduct a no load test?
The no-load test of an induction motor is similar to the open-circuit test of a transformer. The motor is not connected from its load, and the rated voltage at the rated frequency is applied to the stator to run the motor without a load. The 2-wattmeter method measures the input power of the system.
How does a DC series Generator work in a load test?
These conductors cut the flux and induce a current to flow. This induced current is able to produce a voltage that is used as the output of electrical energy. The working of the DC series type is shown in the figure below. The load test is conducted to draw internal and external characteristics.
What are the characteristics of a DC generator?
The characteristics are generally considered to know the performance characteristics of the machine. The internal and external characteristics of the dc series generator are drawn between the voltage generated and load current and terminal voltage and load current. The magnetization curve is drawn between the no-load voltage and the load current.
Why does a DC shunt generator have no load?
As when the load is attached and the generator is started with the help of a prime mover, it develops certain voltage due to the presence of residual magnetism. Due to this, residual flux is developed so the generated develops certain no-load voltage shown in the figure.
What does the OA mean on a DC shunt generator?
The OA line signifies the resistance of the shunt field circuit. Once this dc generator runs at the usual speed, then it will build up an OM voltage. At no-load conditions, the generator’s terminal voltage will be stable which is signified through the MC horizontal dotted line.