What are you doing as trainees?

B

Bobster

Post up what sector of work your in, domestic industrial etc... with a little information on your common day to day work.

I've got an idea, but I want to make sure it's tailored to the demographic.
 
Whats your idea mate dont keep us in the dark
 
Tea, biscuits, sweeping up!

Im in north Scotland, we do mainly domestic but also do commericial and have had quite a bit of industrial work lately too.

Common day to day could be anything! Spent the last 3 days fitting Quantums and panel heaters in a house for the council.
 
RoB2 said:
Post up what sector of work your in, domestic industrial etc... with a little information on your common day to day work.

I've got an idea, but I want to make sure it's tailored to the demographic.
Click to expand...
Industrial maintenance here, and yes I am a trainee, I am training in BMS programming and learning about a huge machine and how to work on it, HTH :biggrin:
 
I work fir a company who do both domestic and commercial amd light industrial, today I put a new supply circuit in a light industrial building (engineering firm) for a new server they have put in, the rest of the week I have been doing a rewire on a commercial print works site, all surface mounted trunking and conduit drops which I put in my self then started pulling in the wires also.
 
MDJ said:
Industrial maintenance here, and yes I am a trainee, I am training in BMS programming and learning about a huge machine and how to work on it, HTH :biggrin:
Click to expand...

What's the machine, an what do you class as large?
 
RoB2 said:
What's the machine, an what do you class as large?
Click to expand...
Not sure what it is called yet, still learning what it does, well what it does regarding how it functions, due to security reasons I cannot say anthing else about it, oh and we have 8 of them.
 
MDJ said:
Not sure what it is called yet, still learning what it does, well what it does regarding how it functions, due to security reasons I cannot say anthing else about it, oh and we have 8 of them.
Click to expand...

Security reasons?

Its not a bomb or a nucular reactor is it :/
 
Can't say mate, lets leave it at that, basically I am in training so consider myself a Trainee at the moment.
 
probably a machine to wash rugby players. :smilielol5::smilielol5::smilielol5:
 
As it stands im a service engineer for a fire alarm company. Although supposedly trying to complete my level 3 nvq 2357.

Although my collarbone decided enough was enough and collasped...
 
Well, this thread derailed quickly. :biggrin:

I'll make an attempt to get back on track. Our company does mostly industrial maintenance and installation, so my work can range from running lighting circuits through false ceilings to control panel works and motor troubleshooting. We have one major client which is a poultry company, so we follow their whole workflow from hatchery to barns to processing plant.

Gives me a great range of experience that will stand me in good stead later. Today I was wiring shielded 4-pair analogue into a PLC card, tomorrow I'll be soldering a control cable for a palletising robot, TAFE (college) Thursday and who knows after that!
 
So the consensus so far is only one in here (not including MDJ), has hands on work regarding motor control.

The challenge I normally set is drawing up some different methods of starting, If people want me to put a little something together shout up. I don't want to set something that the majority will have no idea where to start, as this becomes off putting and I find people won't try and attempt it.
 
Hi :)

I'd like to learn more about motor control. I don't think it would be off-putting - I think it's good when mentors (or even other trainees!) set problems whereby the answer is bigger than perhaps one trainee can solve on their own. Some of the best threads I've seen in here (the trainee section) are where there's an active discussion amongst the trainees about what's going on, with occasional prods by interested mentors, and a final "reveal" at the end of the "ideal" answer if we never get there. It's a bit like the blind leading the blind, but it shows what our thought processes are and where we're coming from.

The closer it is to real life problems the better :)

Thanks for offering to do stuff, it's appreciated. :)
 
Ok then, something simple to start with. A DOL starter. Just a simple start/stop with an overload connection. For the purpose of this there will be no E-Stop required.

I'd like a schematic drawing of the following circuit.

Motor rating for simplicity, 1.1Kw 3phase, ignoring power factor and efficiency.

Supply to the panel will be 3Ph+N. 400v 50Hz.

The control voltage for this will be 24VDC, that will have to be sourced from the 3ph supply via a PSU.

If this doesn't work out too complex for people, I can start adding to this as a base point.

I'll even start you off with the power side of this drawing.

You will however be required to add the rating of the overload. (Can't do anything without a little maths.)

RoB_zpse1ce7dc4.jpg
 
I can't zoom in on the laptop for some reason, I've downloaded the file then opened it but you can't read the symbols when you zoom in. Might be an apple mac compatibility issue?
 
In order from top to bottom you have:
L1 L2 Ĺ3 N E
Main Panel Isolator Q1
Main Contactor K1
Motor Overload (can't make out the symbol I'll be using TOL as that's what I've been taught)
Local Isolator Q2
Motor

As a basic motor control is fairly simple for me I'll PM my answer tonight unless you'd rather I just post it up?
 
Fire away mate, I think I have it done in my head but I'm watching the champions league game on the comp so I won't get it drawn tonight
 
I'll blow the picture up tomorrow.

If anyone wants to PM me answers/questions doesn't matter how stupid, I won't bite.

I realise is ethos probably isn't covered much in general learning, once we get a little more in depth I'll set some of the other mentors challenges.
 
Well done ElectroChem, your missing something to do with the PSU, I'll let you have a think before I let you know.

It's common practice, to have the overload contact first, then the stop button before the latching start contact.

You overload setting is correct, albeit for a 1KW instead of a 1.1KW.

Did other people manage this/understand how it's been done now it's posted up?
 
RoB2 said:
Well done ElectroChem, your missing something to do with the PSU, I'll let you have a think before I let you know.

It's common practice, to have the overload contact first, then the stop button before the latching start contact.

You overload setting is correct, albeit for a 1KW instead of a 1.1KW.

Did other people manage this/understand how it's been done now it's posted up?
Click to expand...

Yeah im ok with that, I take it the latching contact at k1.4 provides No volt release?

I cant see whats missing at the PSU either, a fuse maybe?
 
pennychew said:
Yeah im ok with that, I take it the latching contact at k1.4 provides No volt release?

The contact marked K1.4 is the main motor contactor, it's what's used to latch the circuit once the pushbutton is pressed.

I cant see whats missing at the PSU either, a fuse maybe?

Your right with a fuse, primary protection is definitely needed (240V side), and most power supplies over a certain size will need a secondary fuse.(24VDC side)
Click to expand...

Make sense?
 
Yeah that makes sense, i did have a little mess about with a contactor a while ago and managed to get a no volt release system working with a non latching contact. It was on my test rig thread, i'll post a link but not sure it will work....

http://www.electriciansforums.co.uk/electrical-course-trainees-only/84211-test-rig.html


I did buy some telemecanique buttons and drilled some ali plate to make some controls but never got round to it.

Really interested in this area, I've just been to see a guy I know who does automation projects and is an agent for Mitsubishi doing PLC stuff. He's going to take me on some of his jobs with him after xmas if i can free some time up
 
When I called K1.4 a latching contact I only meant in the sense of holding the contactor in so you don't have to hold the start button. The contact will pull out if the coil loses voltage as you said.

Rob yes we would normally put a breaker for the 240 and 24v sides of the PSU
 
You must log in or register to reply here.

Similar threads

C
Commercial to domestic (embarrassing question)
Replies
3
Views
232
littlespark
littlespark
D
UK Getting 'back' into the industry..
Replies
2
Views
523
David555
D

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Green 2 Go Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses Heating 2 Go Electrician Workwear Supplier
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Advert

YOUR Unread Posts

Daily, weekly or monthly email

Receive a daily, weekly, or monthly email containing a digest of new and recently updated threads.

Thread Information

Title
What are you doing as trainees?
Prefix
N/A
Forum
Electrical Course Trainees Only
Start date
Last reply date
Replies
33

Thread Tags

Tags Tags
commercial doing domestic industrial trainee trainees

Advert

Thread statistics

Created
Bobster,
Last reply from
alanmcm,
Replies
33
Views
614

Advert

TrueNAS JBOD Storage Server

Tilers | UK Tiling Forum | Tilers Forums | Find a Tiler
UK Tiling Forum by Tilers Forums UK
Plumbers Forums | Plumbing Advice | Gas Forum
Outside Play
Back
Top