3 phase motor

[telectrix]

just to add to darkwood's comments. you need to obtain the proper SY glands. these are similar to SWA glands, but have a slot each side to terminate the "armour". you tease it out on both sides ( like a hercule proirot moustache, then squeeze it through the slots. trim off excess after fitting.

edit: just seen from the pics that it's italian. therefore it will be about as efficient as an ashtray on a motor bike, so current mayt be higher than expected. and like their tanks, it will probably run in reverse.:6:

 

[Duncan Bennett]

Cheers, Telectrix. I've used the glands before. Can't think what you're insinuating about italian workmanship; my Punto goes from 0-60 in under an hour!!!! Excellent performance!

 

[telectrix]

bloody. ell. that's quicker than my van.

 

[Engineer54]

Can someone help me with this?

I almost exclusively deal in domestic work, but I've been asked - by a mate - to install a car lift in his garage.

It's a three phase, 400v 6.4amp motor which outputs 2.2kW. I'm running from the Distribution board in swa to the control switch.

My question is, what size of 3 phase Circuit Breaker should i install at the board? Can I get away with 6amp breaker? Also, what's the story with B, C & D curves?

Thanks

Yes, it has a three phase distribution board - it's a factory unit. And yes, I realise it's notifiable. And thanks very much for taking the trouble to answer, my knowledge of three phase is written on my thumbnail.

I'm going to apologize to you Duncan, i wasn't in the best frame of mind last evening, not that is any excuse, just a jerk reaction to your personal comments to me!!

To be absolutely honest with you, when i first read your OP i took you to be a Electrical Trainee, that was going to take on work that he was not competent on. That was also the impression i got from your second above post and hence the comments i posted...

However, i am still a little surprised on you not understanding the different MCB type curves?? I'll also admit that i didn't particularly notice the discrepancy on the motor values given, but motor Tony highlighted that possible problem. ...lol!!

Anyway, i hope you accept my apology in this instance...

 

[Duncan Bennett]

I'm very pleased to accept your apology, Engineer, and would at the same time, like to offer my own in respect of my own tetchy response - you caught me after a few frustrating hours trying to research the information myself; I HATE being beaten on a question and so posting questions - as opposed to comments - on these boards is always, I feel, an admission of defeat on my part :-(

I felt I did have the answer - i'd calculated I=P/V and come up with under 6amps (I think Moses confirmed that later on). It was the fact that the plate said (I think it was) 6.4amps which threw me - I put that down to the motor and just wanted to confirm. As for the curves, I don't know why I missed that, I answered (Correctly) two questions on B, C & D curves in the SJIB exam I sat recently, but in my day (when wylex push button circuit breakers fitted into the old rewireable boards) the types were 1, 2, 3 & 4 :-(

As I said, I've been out of the game for a number of years now and am just trying to get back on the proverbial bike - only the bikes have changed; shiny new gears and aerodynamics. As I said, all respect to yourself and the other guys on here who do maths like it's a first language, however, I have no pretensions of getting my education up to that level. I'm having trouble enough with my Zs's & Ze's without trying to assimilate motor cosines. I hope though, that with the help of all you brainiacs, I'll at least be confident about adding a circuit to Mrs Blogs old CU and leaving her with the correct paperwork (and a bill).

Thanks for taking the time to write. It's much appreciated, and I'll look forward to getting to know all you guys a little better. As an aside, I learned more about motors yesterday than I have in the last 40 years

Now, while I'm on here, can anyone explain all this stuff about 'Earthing'??? Can you get it on a cash account at CEF???

...... only kiddin', Engineer

 

[Silly Sausage]

Whatever you do, don't bring up the subject of Earth Rods!