Direct online forwarding and reverse. | Page 2 | on ElectriciansForums

Direct online forwarding and reverse.

Discuss Direct online forwarding and reverse. in the Commercial Electrical Advice area at ElectriciansForums.net

Zaprinski said:
This is just example, but how do you know with one contactor is Forward and with Reversing?

View attachment 52806
Click to expand...

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.
 
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.
Click to expand...
I just understand little be now but Still needs to learnings more and more any book in online For support looking how to work .
Thank you for help , Have nice day .
 
Zaprinski said:
I just understand little be now but Still needs to learnings more and more any book in online For support looking how to work .
Thank you for help , Have nice day .
Click to expand...


Here is a thread about someone asking a similar question.
See if any of the info us useful to you.
I'm sure there are members who will also suggest good books.
 
James the Spark1976 said:
the forward and reverse contactors are both identical.
the difference is the power going to
forward contactor is wired L1 L2 L3 from left to right
reverse contactor is wired L3 L2 L1 from left to right
this gives either a clockwise or anticlockwise phase rotation.

it helps if you mark them as fw and rev before you start connecting anything as this will help you identify what you are wiring to.
Click to expand...
Thank you .
[automerge]1570107451[/automerge]
Zaprinski said:
Thank you .
Click to expand...
The same thing 3 phase motor used brown,black and grey cable ????
 
the theory behind it is L1 L2 L3 gives a clockwise phase rotation and it is a repeating pattern,

L1 L2 L3 L1 L2 L3 L1 L2 L3 and so on

so if you pick any 3 that are next to each other it will give clockwise rotation.
i.e L2 L3 L1 is still clockwise and so is L3 L1 L2
convention and simplicity means that we wire 1 2 3 but the other options will work the same.
 
James the Spark1976 said:
the theory behind it is L1 L2 L3 gives a clockwise phase rotation and it is a repeating pattern,

L1 L2 L3 L1 L2 L3 L1 L2 L3 and so on

so if you pick any 3 that are next to each other it will give clockwise rotation.
i.e L2 L3 L1 is still clockwise and so is L3 L1 L2
convention and simplicity means that we wire 1 2 3 but the other options will work the same.
Click to expand...
I try tonight, make the example on empty page .
Just need to to be be careful motor is 400v.???
That asking for advice all day .
Thank you ...
 
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.
Click to expand...
Can you asking for writing wires drawing please , should be easy .
Thank you .
 
Zaprinski said:
Can you asking for writing wires drawing please , should be easy .
Thank you .
Click to expand...

Sorry mate, I don't understand the question.
You already have the schematic, so I presume you don't want that again.
 
Zaprinski said:
Ok , Easy wiring diagram but , I doing step by step .
Click to expand...

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.
 
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.
Click to expand...
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.
Click to expand...
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?
Click to expand...
Finally done last night. Thank you for Help .[ElectriciansForums.net] Direct online forwarding and reverse.
 
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)

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