Catalog of Electrical Engineering questions with useful answers that help you develop a clear insight of your conceptual problems.
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Transformer short circuit test is performed to find copper losses on transformer. The figure below displays the circuit diagram of setup used for doing short circuit test on transformer. Álso see Most Important Questions on Transformers: Further Reading/Handbooks on Transformers:
Short circuit test is used to find copper losses on transformer. Short circuit test is used mainly with power transformers. Short circuit and open circuit tests provide the data needed to determine a transformer’s equivalent circuit and to compute its efficiency. Álso see Most Important Questions on Transformers: Further Reading/Handbooks on Transformers:
Iron core is generally preferred over air core in transformers, since iron has higher permeability compared to air. Also see: What is significance of all day efficiency of transformers Transformer action requires alternating fux linking both windings. Although air core can be used for transformer action, however, such action can be more effectively obtained if … Read more
The ratio of output in kWh to input in kWh of an electrical transformer over a period of 24 hours is technically termed as all-day efficiency. Mathematical formula for all day efficiency of transformer is: ηall-day = kWh output in 24 hours/kWh output in 24 hours Also see: What is significance of all day efficiency … Read more
The choice of transmission voltage depends on probably tens of parameters. however given below are four most important factors on which choice of transmission voltage depends:
The major cost of electrical energy primarily depends on energy consumed, however apart from this major cost there are also some service charges. If a consumer is not using electrical energy at all, still he has to pay some amount of bill in terms of service charges.
Alternators are generally star-connected because of below mentioned reasons: So that was reason for connecting 3 Phase Alternators in star-connected configuration. Related questions on Alternators:
The efficiency of an electrical alternator (synchronous generator) depends on kVA output as well as on power factor of load. For given load, the efficiency is maximum at unity power factor and it decreases as power factor falls. Also see related questions on Alternators:
All day efficiency of transformers is significant especially for those transformers whose primaries are never open circuited, but the secondaries carry little or no load for most time during the day. While designing those transformers, Electrical Design Engineers are focused to reduce iron losses (since they occur continuously through whole day). What is all day … Read more
Electrical Engineering XYZ answer on Why Iron Losses are constant at all loads in Electrical Transformers In an electrical transformer, the induced primary ampere turns and secondary ampere turns always neutralize each other, as a result, the flux in core on any load is same as it is on no-load. As a result, iron losses … Read more