10:05 May 26, 2019 |
English to Dutch translations [PRO] Tech/Engineering - Engineering (general) | |||||||
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| Selected response from: Henk Sanderson Netherlands Local time: 23:36 | ||||||
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4 | quadrature droop kit |
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quadrature droop kit |
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quadrature droop kit Explanation: Niet vertalen - dit is een zeer specifieke term, uitsluitend in gebruik bij een zeer selecte groep vakspecialisten die geen behoefte hebben aan vertaling omdat alle literatuur die hierover te raadplegen is toch in het Engels is. Een poging die term toch te vertalen zou alleen maart tot onduidelijkheid leiden. Zie de webref voor de enige plaats in een Nederlandse tekst die ik heb gevonden. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&c... Example sentence(s):
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2 hrs |
Reference: quadrature droop kit Reference information: consisting of a current transformer + burden resistor If a difference in excitation exists, then circulating currents will flow, limited only by the internal machine reactance. This current will appear as a zero PF leading or lagging current, dependent on the machine excitation, and will either subtract or add to the total current that each machine supplies. Reactive current, either leading or lagging, is by virtue of the 90° phase displacement quite commonly described as being in quadrature. Means must therefore be provided to sense this reactive current and limit it to an acceptable level, hence a quadrature droop kit. This comprises a CT (current transformer) and a burden resistor. Examination of vector diagrams shows that at 1.0 PF the small voltage produced across the burden resistor adds at right angles to the sensing voltage. This produces little change in the sensing voltage and therefore no change in the terminal voltage. The effect is more marked at 0.8 PF but only marginally so. At zero PF however, the additional voltage is in phase with sensing voltage, producing a much larger change. The artificially high voltage now seen by the sensing circuit causes the machine excitation to be reduced. Sufficient voltage is produced to ensure that when full load current at zero PF is flowing, the terminal voltage will droop by 5%. This should be sufficient to limit the circulating current to a satisfactory level, which in any case should not exceed 5% of the normal maximum current. In short, the machine supplying more than its share of the reactive current has its excitation reduced. As an under excited alternator draws less reactive current, the excitation balance and hence power factor balance is restored. https://powercontinuity.co.uk/knowledge-base/diesel-generato... |
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