transformer winding वाक्य
उदाहरण वाक्य
मोबाइल
- A "'severity factor "'is established as a coefficient to assess the dielectric severity supported by a transformer winding considering the incoming transient overvoltage ( voltage spike ).
- Severity factors are a newly concept for analyzing the dielectric severity supported along transformer windings when a transformer is submitted to a non-standardized transient voltage waveform induced from the power system.
- Low frequency oscillations like motorboating indicate that some device or circuit with a large time constant is involved, such as the interstage coupling capacitors or transformers, or the filter capacitors and supply transformer winding.
- An additional transformer winding supplies 600-800 kW at 1520V for head end power ( heating ), there are also 150 kW, 380V, 50 Hz and 15 kW, 110V DC auxiliary supplies.
- Using isolation transformers, which were bulky and expensive, in miniaturized circuits to separate the driving source and the switch element resulted in magnetic pick-up and spike feed-through due to the transformer winding capacitance.
- The peak current is set in principle by the rate of rise of the supply voltage on the rising edge of the incoming sine-wave, but in practice it is reduced by the resistance of the transformer windings.
- The "'TDSF "'gives further detailed information on the severity supported by the transformer windings due to the transient event coming from the power system, regarding to the internal transient response due to dielectric tests in the time domain.
- As the anodes of each AC phase are fed from opposite ends of the centre tapped transformer winding, one will always be positive with respect to the center tap and both halves of the AC Waveform will cause current to flow in one direction only through the load.
- If the mechanical regulator design is sensitive to small voltage fluctuations, the motion of the solenoid core can be used to move a selector switch across a range of resistances or transformer windings to gradually step the output voltage up or down, or to rotate the position of a moving-coil AC regulator.
- In European nomenclature a first letter " E " identifies tubes with heaters to be connected in parallel to a transformer winding of 6.3V; " U " identifies tubes with heaters to be connected in series across the mains supply, drawing 100 mA; and " P " identifies similar 300 mA series-connected tubes.
- The tap selection on any tap changer may be made via an automatic system, as is often the case for OLTC, or a manual tap changer, which is more common for NLTC . Additionally, tap changers are often placed on the high voltage ( low current ) transformer winding for easy access and to minimize the current load during operation.
- Trouble comes quickly to such a scheme when there is more than one neutral or ground connection in the system, or when the DC voltage is applied directly across a transformer winding, which has AC reactance but little DC resistance to limit current flow, or when AC is applied directly across a capacitor which opposes DC flow but little reactance to AC flow.
- The resulting asymmetry in the traction heads is used for maximising the capacity of the head end power, which supplies on-board electric equipment and measuring devices : while six of the eight windings of the main transformer on the first traction head supply traction converters and two supply a 0.7 MW auxiliary converter for 670 V DC head end power, in the second traction head, traction converters need only four main transformer windings and the other four windings supply a 1.4 MW auxiliary converter.
- The traction motors are asynchronous induction motors like those of the HSR-350x, rather than synchronous motors as on the KTX-I . rather than the originally foreseen Each traction converter consists of two parallel-switched four-quadrant converters, which function as rectifier modules by converting single-phase alternating current ( AC ) from one main transformer winding each to direct current ( DC ), a 2, 800 V DC intermediate circuit, and one inverter module converting the DC supply to the three-phase AC supply for traction motors.
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