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DesertRancher… how about additional detail:: 1) What solutions have you thrown out, such as running a 2-wire circuit, radio-control, etc? And, what was the reason, for example, cost or other limiting factor? 2) Is pipe above or below ground? 3) Is pipe metallic or non-metallic material...

M. Jensen... how do you "notice" the tank is overflowing? Phil Corso

ccw... actually you did quite well! Phil

Aryan... how are the R and C elements installed on the transformer? Can you provide a simple hand-sketch or SLD (Single-Line-Diagram) illustrating a typical installation? Phil Corso

Controman... Inadvertent energization of an alternator while on turning-gear is not as uncommon as some think. It is certainly more detrimental to the mechanical integrity of turbine and rotating components, like the shaft and coupling(s), than to electrical components. The alternator's...

Aryan... can you elaborate on the Resistance-Capacitance circuit you mentioned for Over-Voltage protection of Power?) Transformers? Regards, Phil Corso

JayR... see Control.Com Topic: http://www.control.com/thread/946924428

H2G... lifting the brushes will separate the field-winding from the exciter! Have you tested resistance using an ohmmeter instead of the IR meter? A very common source of ground-failure is inadvertent grounding of the slip-ring mounting itself. It must be isolated from the shaft! What is...

Sensorless... correction to the last sentence in my 31-Dec-11 (2:30pm) post! It should read, "... phase-to-winding midpoint voltages (Vao, Vbo, and Vco) become... ! Regards, Phil

Sensorless... I can think of one reason for using a delta, and not a wye, motor connection. If wye-connected, the motor, like any other 3-phase, 3-wire load, exposes the windings to neutral-displacement, even neutral-inversion? This phenomenon causes the phase-to-ground voltages to become...

Follow up to Schmooot... Attached is a schematic circuit showing how to alter the Dynamic Braking Circuit (originally provided for a 3-ph induction motor) so that it can accommodate the replacement single-phase, 2-Value Capacitor (Start and Run) Fractional Hp motor! Modifications to the original...

H2G... what are readings with brushes lifted? Phil

H2G... what tests have you carried out, thus far? Regards, Phil Corso

AJ... the impedance formula is: %Z = SQRT[ (%R)^2 + (%X)^2 ] at 50Hz. And, as you deduced, only the X term is affected by frequency. Thus, the %Z formula, for any frequency, f, is: %Z = SQRT [ (%R)^2 + (%X x f/50)^2 ] Please note the formula is for typical power transformers! It...

Schmooot... regarding the comments you posted: 1) Can't Reverse Motor While Running. A single-phase fractional motor can be reversed by switching the power supply leads to either the 'run' winding or the 'start' winding. But, while operating at normal speed the 'start' winding is...

Schmoot... please send me the motor's nameplate data and your your email address. Phil

Sriram... because Vector-Group selection is done with internal connections brought to specific external terminals, there is no technical reason one has an advantage over the other However, I do remember that European manufacturers readily furnished stepdown transformers, such as Dy1, Dy7, and...

Schmooot... two questions: 1) Is the motor also reversible? 2) Can you send me the Schematic, so that I can modify it to include the "Brake" circuit? Phil Corso Cepsicon[at]AOL[dot]com)

Ernie... I erred. It is: http://control.com/thread/1026217631 "Vector Group Coding." Regards, Phil Corso

HB... damage will not result if the phase-displacement is "just a fraction of a degree!" In fact, Syncronizer HW or SW, tolerate several degrees. Do you need additional information or details? Regards, Phil Corso