Direct online forwarding and reverse.

telectrix · Oct 9, 2019

step by step is best. break each section down, understand the workings, then combine all together.

Spoon · Oct 9, 2019

Zaprinski said:
Ok , Easy wiring diagram but , I doing step by step .

Have a look at @telectrix post above, with the wiring diagram on it. That shows the wiring for the motor as well.
Also follow his advice about breaking the schematic into sections.
If you have any questions mate then just ask.

Zaprinski · Oct 9, 2019

telectrix said:
have a look on here:

forward/reverse contactor wiring - Recherche Google

this diagram seems the easiest to follow:
View attachment 52982

Using the same method , 3 phase wiring brown, black and grey.

Zaprinski · Oct 10, 2019

Spoon said:
The Forward Contactor will be the one with the Forward Start pushbutton wired to the N/O of that contact.
or if nothing is labelled up then:
As the Forward & Reverse circuits are functionally the same then just pick one for Forward and the other for Reverse. The actual Forward & Reverse wiring for the motor is not part of this circuit.

Can you asking for writing wires dia

Spoon said:
The Forward Contactor will be the one with the Forward Start pushbutton wired to the N/O of that contact.
or if nothing is labelled up then:
As the Forward & Reverse circuits are functionally the same then just pick one for Forward and the other for Reverse. The actual Forward & Reverse wiring for the motor is not part of this circuit.
[/QUOTE
Finally done last night.

Spoon said:
Ok, so just so that I'm clear on this: You are just following the drawing and picture, to see how it works and not actually wiring anything up?

Finally done last night. Thank you for Help .

[ElectriciansForums.net] Direct online forwarding and reverse.

Spoon · Oct 10, 2019

Glad you got it working mate.

If you want, now that it is working I'd tidy it up, label cables and use correct colour cables.
Just for general information, below is a screen shot of cable colour identification, from BS EN 60204-1-2018 (page 83)

Zaprinski · Oct 20, 2019

Good morning again ,any Idea I looking for example cable sizing.

[automerge]1571565704[/automerge]

Pete999 · Oct 20, 2019

Zaprinski said:
Good morning again ,any Idea I looking for example cable sizing.View attachment 53253 View attachment 53254
[automerge]1571565704[/automerge]

Iitle unfers you need help in DOL forward and Reverse of a motor

Zaprinski · Oct 20, 2019

Pete999 said:
Iitle unfers you need help in DOL forward and Reverse of a motor

I know , but I don’t like make new post .
I little be confused theory now , I not have proper book,Any idea where did I find examples test .
I’m ready too pay small amount ££££.
Pdf file .
Thank you .

Spoon · Oct 20, 2019

Zaprinski said:
I know , but I don’t like make new post .
I little be confused theory now , I not have proper book,Any idea where did I find examples test .
I’m ready too pay small amount ££££.
Pdf file .
Thank you .

Hi mate.
It's best if you do new questions in a new post mate.
Also, if you are going to get into electrical design then you need to get the BS7161 book.

IET Wiring Regulations 18th Edition

#html-body [data-pb-style=THAG3L6]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll;border-style:none;border-width:1px;border-radius:0;margin:0 0 10px;padding:10px}#html-body...

www.test-meter.co.uk

Also, with questions like the above, we don't like giving out answers without you first attempting to do the question and showing us your workings-out. Then we can correct anything. It's the best way of learning.

Baddegg · Oct 20, 2019

It always looks intimidating @Zaprinski when it written like that but all the things you need are in bs 7671 just take your time and break the question down.....if you know your design current and installation method and relevant correction factors you can choose your cable and then you can calculate for volt drop, the more you do it the easier it gets...good luck

Zaprinski · Oct 20, 2019

Spoon said:
Hi mate.
It's best if you do new questions in a new post mate.
Also, if you are going to get into electrical design then you need to get the BS7161 book.

IET Wiring Regulations 18th Edition

#html-body [data-pb-style=THAG3L6]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll;border-style:none;border-width:1px;border-radius:0;margin:0 0 10px;padding:10px}#html-body...

www.test-meter.co.uk

Also, with questions like the above, we don't like giving out answers without you first attempting to do the question and showing us your workings-out. Then we can correct anything. It's the best way of learning.

Ok I got book I try to work out and show you my home work .
Thank you for help .

EricMark · Oct 20, 2019

Most forward and reverse needs some time for the motor to stop. The circuit you have shown would allow the motor to be reversed with any time for it to stop first.

Simon47 · Oct 22, 2019

Yes, I'd observed that. There should really be a N/C contact from each direction's contactor inhibiting the other direction's coil circuit. Wouldn't stop the operator hitting stop then reverse immediately - but it would stop them just hitting reverse.
Mind you, the mechanical interlock would deal with that - but IMO it would be poor design to be relying on that rather than designing the control circuit correctly.

Zaprinski · Oct 22, 2019

Simon47 said:
Yes, I'd observed that. There should really be a N/C contact from each direction's contactor inhibiting the other direction's coil circuit. Wouldn't stop the operator hitting stop then reverse immediately - but it would stop them just hitting reverse.
Mind you, the mechanical interlock would deal with that - but IMO it would be poor design to be relying on that rather than designing the control circuit correctly.

Thank you .

Spoon · Oct 22, 2019

Simon47 said:
Yes, I'd observed that. There should really be a N/C contact from each direction's contactor inhibiting the other direction's coil circuit.

There is. There is a N/C contact from the Reverse contactor in the Forward circuit and vice veras.

Simon47 · Oct 22, 2019

Ah yes, so there is. Too late in the evening for my memory

Zaprinski · Oct 23, 2019

Simon47 said:
Ah yes, so there is. Too late in the evening for my memory

Never be late .?

Spoon · Oct 23, 2019

I think @Zaprinski wants to know about the question in his post #31 now, but didn't start a new thread so things are getting mixed up. I think he has sorted the starter question as he says he built it in his post #29.
For his question in post #31 he is getting the BS 7671 book and hopefully will attempt the question himself. We can then look at his results and correct anything. Always better to try yourself and then ask where you went wrong.

Zaprinski · Oct 23, 2019

Spoon said:
I think @Zaprinski wants to know about the question in his post #31 now, but didn't start a new thread so things are getting mixed up. I think he has sorted the starter question as he says he built it in his post #29.
For his question in post #31 he is getting the BS 7671 book and hopefully will attempt the question himself. We can then look at his results and correct anything. Always better to try yourself and then ask where you went wrong.

All done forward and reversed for now .
Thank you .
Just need to help for theory now , I start assignment.
I understand quickly Cable size and Voltage drop .
I’m not Lazy , always try doing my self ?
But my first language not English??
I should me Jobs now ?
That I ask people help me for money?