ahr35181
it looks like the motors you have are dahadler tap wound constant torque. the leads should be marked u1 v1 w1 u2 v2 w2.
for high speed supply w2-u2-v2 join together u1-v1-w1
for low speed supply u1-v1-w1 (others open)
trust this will help.
kind regds
pugap:- encapsulating the endwindings with dow corning 1890 paintable compound (when paintong windings also paint a coating on the inside frame) and fit sinted bronze pourous plugs to the lowest level of frame should help.
kind regds
jammyjim:- dont know of any web site however samuel heller shows examples of this connection in his book multispeed and standard squirrel cage motors vol 1 single speed. ref "the offset T circiut"
hope this helps
kind regds
jammyjim :- sounds like you have a scott "t" connected motor. woods fan co use this type of motor for small aom fans. back coils are connected in series and the top winding connects to the center point of the back winding this forms a star point.
hope this helps
kind regds.
grover194.
if you contact the local pleuger/mercury agent(distributor) and ask for a complete winding repair kit .
in this kit you get winding wire slot insulation,phase insulation ,connection kit and banding tape.
kind regds
edison123:- coil grouping
a b c a b c a b c
4 5 5 5 5 4 5 4 5 :-repeat wind 12 groups 5 + 6 groups4.
note:- unbalanced elect deg, connect series star only.
also check rotor slotts for cusp or coging.
cannot get a balanced winding for 6 pole (12.87 elect deg between slotts)config.have you...
electricpete:- nylos make a very good labyrinth seal and is easy to fit (minimal machining req) we use them along with nsk ddu c3 bearings and water resistant nlgi2 type grease.loctite gasket illiminator is used on all spigots and mateing faces.this type of protection is to ip56.however for a in...
naglo:- please advise :- do you have a characteristic curve for the liquid resistor? what is the full volume of water in the tank? what starting torque is required,and what is the internal resistance of the rotor circiut.
would reccomend a sodium solution rather than salt.
kind regds.
abuomar:-you could fit thermisters into the winding.these are embedded into the end windings (3# one in each phase) when rewinding or during manufacture of new machines. for a class "f" insulation system ptc130 should be used.thermistors moniter temprature rise with in the machine...
lewish:- yes its becoming a big problem with newer vsd drives that do not have filters in the output.we have modified over 200 machines,it mainly occurs with drives and motors from 110 kw upward.normally you get a electrical discharge through the drive end bearing for close coupled machines or...
electricpete:- we select space heaters on motor iec metric frame sizes, providing the relative humidity is not over 90%.
eg:-d63/71 frame =10 watts, d80/90 frame= 20 watts,100/112 frame=30 watts,d132 frame=50watts d160 frame=60 watts, d180/200 frame= 80watts,d225/250 frame=100 watts,d280/315...
parcifal:- try looking at the brush grade on the sliprings. had a simular problem and changed drush grade to a silver graphite type and this fixed the problem.
kind regds.
lovison:- most motors today are wound with a class "f" insulation system with a class "b" temp rise (economics dictate this to be cost effective) , however the only time temperature rise should be taken into consideration with submersible pumps is when the water temp exceeds...
electricpete:- we not familiar with the correct nema terminology. however you are correct in assuming "weather protected" "tefc")ipw44 should be ok for out door sevice, as the "w" stands for weather protection (bs 4999).
we would suggest in future if you spec new or...
electricpete:- as a manufacturer most motors are produced to be "cost efective"as well as complying to bs nema iec specs. we regually make mods to machines to meet customer demands and specs (normally at no extra charge).
in you case we think an over sight was made on initial...
