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o Process Value... Armature-Reaction is present for any type load; resistive, inductive, or capacitive, i.e., regardless of power factor! o Francis... The FASCO data sheet indicates the motor has 5-speeds. Such variation, is done wth what is called slip control. It is usually obtained via...

Gentlepeople... here's a question concerning a tangent topic: Has anyone heard the following dimensional-unit used to measure viscosity: "Aluminum-Ball (or Aluminium-Ball) Seconds?" How about "Tennis-Ball Bounces?" Regards, Phil Corso

Francis, cutting the shading coil should be adequate. Do not expect, however, the output voltage wave form to be that of the sine wave. Output current will be significantly distorted. Reur your question about performance... NO! It will not be better as an induction-generator than a motor...

Aman... reference number I sent should have been: Thread # http://control.com/thread/1026242858 Phil Corso

Aman... as a start see Control.com Thread # http://control.com/thread/102642491 "Neutral Innteruptus" Regards, Phil Corso

Try PVbrowser's link! Phil Corso

Edward... Is it correct to state that your facility's alternator's are supplying power to the facility's electrical load? Furthermore if connected to an "External Grid" they do not normally export or import power! Phil Corso

James... just dropping pebbles, not rocks, in a pond! Regards, Phil

Wackadoodle... also investigate possibility of Walkie-Talkie RFI! Phil Corso

Wackadoodle... for a specific "pointer"... try to correlate the time of the incident with de-energization of an AC or DC solenoid in proximity to the suspect circuit(s)! Phil Corso

Wackadoodle... Search Control.Com archives for Threads titled "EMI", "Interference", "Bite", "T/C", etc! One of the stories may ring a bell! Regards, Phil Corso

George... a large number of factors influence a transformer’s impedance. Key factors are core material selection such as permeability, flux density, laminate thickness, and coating. Others are conductor characteristics (resistance, shape, Ampacity, and insulation.) Still others are core...

Tyler... answering the questions in your 05-Jan-11 (18:31) post: Q1) Alternator Rating if Air Cooled One Rule-of-Thumb (ROT) says that using air as the cooling medium will reduce an alternator's capacity about about 20%. However, three key factors are involved: a) H2 pressure; (b) the...

Abdul... what were the corresponding V, kW, kVAr, and pf, readings? Regards, Phil

Ramasamy... I forgot to mention Control.Com Thread # 1273871432, "The Physics of Synchronizing Alternators! Phil

Raj... for "What's in a Name?" see Control.Com Thread # 1026145196. Regards, Phil Corso

Ramasamy.. Further to my 11-Jan-10 (13:04) response: The circulating current, 0.6 A, is about 88% of rated amperes. Since there is no connected load, then it is relatively high. It suggests that one of the alternator's has a a higher excitation-current than the other. The attendant...

Ramasamy.. Yes. What you have observed is a circulating current resulting from the development of synchronizing power. Regards, Phil

Aryan... I suggest you picture the transformer as three (3) single-phase units, each having a primary voltage of 34.5/Sqrt(3) or 19.92 kV, and a secondary voltage of 0.30 kV. Then, the turns-ratio is 19.92/0.30 or 66.4, as above. If the Vector Group Designation was not Y-d, but instead...

Joseph... are you sure Availability Factor (AF) is what is required, and not the Capacity Probability Analysis (CPA?) AF is essentially the number of hours the plant is "available" for production minus the number of "unavailable" hours, all divided by the number of hours in a specific period...