A Laboratory Manual of Alternating Currents
A Laboratory Manual of Alternating Currents
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In our eReader you can find the full English version of the book. Read A Laboratory Manual of Alternating Currents Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Laboratory Manual of Alternating Currents
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f . Also by two wattmeters measure the power of the three-phase ,• system and prove (by measuring the watts in the separate phases) r: that Wi + W 2 = total power, both for balanced load and un- balanced load.
p Obtain a three-phase load (Y connection is the simpler) whose ^ power factor can be made small. Take readings of W\ and W 2 (also of watts per phase) with > less than 60° and^greater than I 60° for balanced and unbalanced load. Account for values f observed. Calculate the equivalent res...istance and current for the inductive load.
To balance a Y-connected load, open phase 3, and, by adjust- ing for equal voltage drop across phases 1 and 2, balance these two. Then open phase 1 and balance phases 2 and 3, making all adjustment on phase 8; then phase 1 may be connected and the load will be balanced.
Digitized by Google EXPERIMENT XXVI.
GENERAL POLYPHASE TRANSFORMATION; TWO-PHASE TO THREE-PHASE TRANSFORMATION WITH BALANCED AND UNBALANCED LOAD.
It is impossible to change, by means of static transformers, single-phase power into polyphase power, but having one poly- phase system, it is possible, by selecting transformers of proper ratio and properly connecting them, to change to any other poly- phase system.
What to read after A Laboratory Manual of Alternating Currents?
You can find similar books in the "Read Also" column, or choose other free books by Morecroft, John H. (John Harold), 1881-1934 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
f . Also by two wattmeters measure the power of the three-phase ,• system and prove (by measuring the watts in the separate phases) r: that Wi + W 2 = total power, both for balanced load and un- balanced load.
p Obtain a three-phase load (Y connection is the simpler) whose ^ power factor can be made small. Take readings of W\ and W 2 (also of watts per phase) with > less than 60° and^greater than I 60° for balanced and unbalanced load. Account for values f observed. Calculate the equivalent res...istance and current for the inductive load.
To balance a Y-connected load, open phase 3, and, by adjust- ing for equal voltage drop across phases 1 and 2, balance these two. Then open phase 1 and balance phases 2 and 3, making all adjustment on phase 8; then phase 1 may be connected and the load will be balanced.
Digitized by Google EXPERIMENT XXVI.
GENERAL POLYPHASE TRANSFORMATION; TWO-PHASE TO THREE-PHASE TRANSFORMATION WITH BALANCED AND UNBALANCED LOAD.
It is impossible to change, by means of static transformers, single-phase power into polyphase power, but having one poly- phase system, it is possible, by selecting transformers of proper ratio and properly connecting them, to change to any other poly- phase system.
What to read after A Laboratory Manual of Alternating Currents?
You can find similar books in the "Read Also" column, or choose other free books by Morecroft, John H. (John Harold), 1881-1934 to read onlineMoreLess
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