Recent content by Technician

Looks like this thread may have slowed down so, here is another one. Imagine a motor comes back to you after a rewire but the starts & finishes have not been identified or tagged up, or someone has removed the tags/ferrules. How would, or how could you identify them and what is the...

I think Sidewinder has had a go at this before.  With that lot on your communications with others would be impaired.  PPE should be a last resort & not a first.

Some of you may be involved in this lot but the HSE plus what masquerades as government are proposing "wholesale" changes to these regulations. I was handed a magazine yesterday and I read the article.  I can quote from one of the paragraphs; "Putting aside any issues about retention of the...

It is not as big as a Suez searchlight.  They could be four feet in diameter and powered by a carbon arc. Still impressive though.

Would go with Matty on this. I have no idea if anyone followed the events of the Budget this week. Up till then, you had no choice upon retirement but to purchase an Annuity.  All that changed with the Budget and it means that you can now draw the ENTIRE pension as a lump sum on retirement...

Yes;  about the one who was told to fill THAT engine with THAT oil. He did.  Right to the top of the cover over the camshaft.

I did read something many years ago about drying out motors using welders or MG sets as welders.  The nature of the note was more cautionary than procedural because the originator clearly knew it went on and that damage had been done. Assuming that the motor coils are intact a small heating...

Yes; and the Russians knew that radio valves would work after a nuclear strike and that transistors would not. The Americans ditched valves at the first opportunity.

I looked at this "all ends up" yesterday.   I wondered about looking at it as a "black box" so I did the following. I wondered what might happen to the reads on the ends of the wires coming out,  as Sidewinder says, there are only three and the centre point, if there is one, is hidden. So; ...

I thought about this last night;  I think I have a solution based upon "Black Box" analysis.  Sidewinder is right;  my previous method would NOT work because too many assumptions need to be made.  The Black Box analysis is more reliable because if you have two such boxes, the same test has...

I think I have the answer.....using a "black box" approach. Just examining my reasoning.

I have had a look at this all ends up....I have even tried to examine it using a "black box" technique. Consider this;  If one conductor is disconnected in delta only one set of windings is energised.   If one conductor is disconnected in star two sets of windings will be energised. This...

Sidewinder; I will have to post the sketches and yes, Kirchoff's laws underpin this lot. It is a good many years ago but I knew the guys who were REALLY up against it.  The problem was a tank of liquid methane and the submerged pump single phased and blew the HRC fuses. The procedure in...

My correction;  the second ammeter should read double the read on the other one because it will be reading the current flowing in one winding.  The first ammeter will be reading the current in two windings in series. I just went back to the cigar packet.

I have had an idea. Arrange to pass a small direct current through the motor windings using a small power source, like a battery. Measure said current.  Do this three ways. Record results.  They should be the same. Now, let one terminal be A the next B and the next C. The battery and its...