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Yeehaa, good thinking star-delta. Makes sense doesnt it. I should of thought of that. SOme time its the easy things. Actually most times it the easy things!

Motor was overhauled in workshop recently. Overhaul process included coat of paint over windings. Once assembled and testing, motor created bang sound, and puff of air. At first workman thought he blew the capacitor, which was quickly eliminated because it was a split phase motor. No capacitor...

Even though once power is applied the rotor should pull into alignment with the stator, perhaps in your particualr set-up, there are some causes which will not allow the rotor to correctly allign itself. IE - Downward load pressure, coupled with gravity. You mentioned there is end play...

Practical soloution. Try each different connection - that is in Star connection - and apply power. Label each lead with a,b,c a1,b1,c1. connect start point, apply power to relevnt cable and listen to motor. If not good, interchange one of the phases. IE interchange a & a1. apply power and...

Which country you in EEOO? We are distributor for FASCO, may be able to help

In a 'practical' sense, megger the motor to earth and b/n windings, is 'practically' a great test. A 'prefix' tester would help you find shorts between windings. All other test would be mechanically based. Run the motor and check AMps. If you have access, provide yourself with the tests that...

Agree with jerryrobinson. The slightest movement of the rotor will affect the internal cent switch. If it infact does have one. The motor will either struggle to start, or most probably in your case, start, but run hot, and burn out. The switch unable to open will cause this prob. There are...

Is there a centrifugal switch present in the motor? Are there seperate cables for the high/low/start windings? If so, how many? Depending on the type of motor application, speed selection can take place through terminals on switch plate, and/or cent switch. Again depending on motor application...

Was not sure where to post this query... We have recently re-insulated a coil out of a welding unit. (Insualtion paper b/n wire and laminations) Only the coil/laminatins were given to us. The coil then returned burnt out. It is cross sectional copper (6x4mm) wire. My two queries are 1) What...

Thanks for your responses. What you have suggested is exactly what i am looking at doing. What i am unsure of is ; Why does the circuit board exist? There must be a reason why it is there, otherwise its original design would have been as simple as we have suggested. As for the capacitor...

I have a 24 Volt Battery Charger, used for walk-behind forklifts. Its design consists of - transformer, capacitor (15uf), relay, diodes (x2), Ammeter (30A), and electronic circuit boards. I wish to place a manual radial timer in the circuit (8 hr MAX). Am I correct in assuming that the relay...

Thanks Rbulsara, I was after a basic formula that i was hoping may be constant through all generator sizing. I have taken note of variations that may occur, such as starting currents. I some times am asked this question, but not having had much to do with generators, dont know any formula as...

i just read through FAQ237-766, which related to generator sizing. I was hoping there is a formula for working out generator sizing, (kVA) in relation to either Amps, and/or Watts of attached load.

I was hoping a relatively consice answer could be provided for the following. Wondering what effect on a motor winding would occur with an increase of 200Hz, to 300 Hz. Thanks in advance

I am machining a cylinder shape epoxy glass material, and press fitting it into a hollow cylinder shape metal ring. Inside of the epoxy glass, i am pressing a bronze material gear. These are actually constructed to 'break' under overloaded uses. But, of course, not 'break' under normal...

Thank all for your responses, i appreciate the feedback. The BlackSmith, unclesyd and carburize i am unaware of what an interferance fit is. It sounds as though a weld may not be suitable for this operation, and may be too stressed under load bringing the weld to failure. Alternativly if a...

Have a hardened steel hollow shaft off an electric motor. Apparently it may be chromed on the outer surface. I want to extend a shaft from the original. I dont want to press it in, as it may expand the original outter race where the rolling bearing sits. Once placing the new shaft inside, i...

Rewinding a single phase motor. Original winding - run = one in hand (or two in hand), start = one in hand. Replace run with two in hand, and start with two in hand - or one in hand in both, and parrellel connections. Motor contains centrifigul switch, also a motor does not contain a cent...

I am looking to update and/or add to my internal connection diagrams of 3 phase motors. (ie. post rewind.) So far i have quite a few 2 speed, single speed, parrellel, series internal conn'tn diagrams, but i am keen to add. Are there many or any websites that display such information, or...