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Can you double up transformers?
Yes, it is possible. However, note that there are two ways to “wire the outputs together”, parallel and series. In series, the voltages add at the same current.
What will happen if two transformers connected in parallel with improper polarity?
The transformers should be properly connected with regard to their polarity. If they are connected with incorrect polarities then the two emfs, induced in the secondary windings which are in parallel, will act together in the local secondary circuit and produce a short circuit.
Is there any loss in a transformer when load is not connected at secondary?
With no-load connected there is no secondary current which means that the secondary voltage is at its maximum value. If the transformer supplies a very low lagging power factor, large secondary currents will flow resulting in poor voltage regulation due to greater voltage drops in the winding.
Can a single three phase transformer be used?
Three phase transformation can be done in two ways, by using a single three-phase transformer or by using a bank of three single phase transformers. There are advantages and disadvantages to each option.
Can you substitute alternating current for direct current?
Alternating current reverses polarity 50 to 60 times per second, depending on where you are in the world. Direct current doesn’t. In rare instances you can substitute one for the other. To stay safe, always assume you cannot. Since polarity stays constant in DC, you have to pay attention to it.
How is the winding of a zigzag transformer divided?
The winding of each phase on the secondary star in a star-zigzag transformer is divided into two equal halves. Each leg of the core of transformer is wound by half winding from two different secondary phases in addition to its primary winding.
How is a star star transformer formed in a 3 phase transformer?
Star-star transformer is formed in a 3 phase transformer by connecting one terminal of each phase of individual side, together. The common terminal is indicated by suffix 1 in the figure below. If terminal with suffix 1 in both primary and secondary are used as common terminal, voltages of primary and secondary are in same phase.