Search results
Results from the WOW.Com Content Network
However, a transformer may include a tap changer on each winding if there are advantages to do so. For example, in power distribution networks, a large step-down transformer may have an off-load tap changer on the primary winding and an on load automatic tap changer on the secondary winding or windings. The high voltage tap is set to match long ...
The operation of all tap-changing transformers in the system needs to be synchronized between the transformers [15] and with the application of shunt capacitors. [ 16 ] Due to the localized nature of reactive power balance, the standard approach is to manage the reactive power locally (decentralized method).
Both linear spacing and power-of-two-style Vernier spacing can be employed in establishing the tap positions, e.g., a four-tap transformer can provide taps at 0.25, 0.5, 0.75, 1.0 (linear) or 0.0625, 0.125, 0.25, and 0.5 (Vernier). (The limitations of the Vernier—in this case, that the maximum obtainable amplitude is 0.9375—are less ...
center tap A connection on a transformer which has equal voltage to either end of the transformer winding. ceramic resonator A piezoelectric element used to stabilize the frequency of an oscillator. channel Any communication path between a signal transmitter and a signal receiver, or, a pre-selected operating frequency for a radio system.
The most straightforward phase angle compensation device would be to replace the tap changer on PAR with thyristors to switch portions of the winding in and out, forming a Thyristor-Controlled Phase-Shifting Transformer (TCPST). [17] However, this is generally not done as a TCPST would be considerably more expensive than a PAR.
a load tap changer (LTC) at the substation transformer, which changes the turns ratio in response to load current and thereby adjusts the voltage supplied at the sending end of the feeder; voltage regulators , which are essentially transformers with tap changers to adjust the voltage along the feeder, so as to compensate for the voltage drop ...
In electronics, a center tap (CT) is a contact made to a point halfway along a winding of a transformer or inductor, or along the element of a resistor or a potentiometer. Taps are sometimes used on inductors for the coupling of signals, and may not necessarily be at the half-way point, but rather, closer to one end.
The Korndorfer starter can be used manually. Newer devices provide full automatic operation, which in addition would have: triple-pole line contactor (switch), start contactor, running contactor, three single-pole overload relays, autotransformer with a set tap-changing links, a suitable timer, and start and stop pushbuttons. [2]