Can transformers be synchronized?
Synchronization of transformer can be checked by either of following steps: Checked by synchronizing relay and synchronous scope. If Secondary of Transformer is not LT Then we must use check synchronizing relay and Commission the system properly. After connecting relay.
What is the disadvantage of auto transformer?
The main disadvantage of an autotransformer is that it does not have the primary to secondary winding isolation of a conventional double wound transformer. Then an autotransformer can not safely be used for stepping down higher voltages to much lower voltages suitable for smaller loads.
What is parallel operation?
Parallel operation is the connec- tion of two or more power sources of the same size and output volt- age to obtain a higher output cur- rent. When connecting in parallel the outputs must be connected together keeping polarity in mind. The output voltage remains the same, but the current increases.
Why the OC test is normally done on the LV side?
Why OC test is performed on LV side? Explanation: Open circuit test can be performed on any side but for our convenience and supply voltage available we generally conduct the test on LV side, to get corresponding parameters on HV side we can use transformation ratio. … Current by voltage will give net admittance. 6.
What is the current transformer Mcq?
A current transformer is a device that is used for the transformation of current from a higher value into a proportionate current to a lower value. The ratio of the primary current and the secondary current is known as a current transformer ratio of the circuit. The current ratio of the transformer is usually high.
What is the phase relationship between the primary and secondary voltage of a transformer?
What is the phase relationship between the primary and secondary voltages of a transformer? The primary and secondary voltages of a transformer are 180° out of phase.