How to Connect a Direct online Starter (DOL Starter)

Connecting a direct online starter (DOL) for a motor or pump.
This will show you how to connect the contactor and overload.

[@goldfish5606]

Please dont stop making these videos, they are very helpful . Thank you so much

[@kadrimohammed7711]

شكرا استفدت كثير واصل Good Thank you so much

[@santosasmita]

Hi Jean For 3phase with Neutral and Earth. Do you normally put earth in a connector and replace L1 @ A1 with neutral wire. Cheers

[@Strongs_G3528]

Hello Jean B...your set up clearly works but I have a couple of questions about it that I hope you can help me understand. I'm having difficulty understanding why the contactor coil is not already energized before pressing the start button. It appears the contactor coil is already receiving power from the L1 bridge and completed by connecting A2 at the bottom with the motor overload protection switch. I know I'm missing something here so please help me understand. Thank you.

[@p0we111]

Hi Tony. Because you're first passing the L3 wire through the Normally Open (NO) switch of the contactor aswell as the NO contact of the switch,no power will pass through to A2 until you hit the start button. If you are testing coil A1 with a voltmeter and get 230V when tested to ground(in my case single phase) and you test A2 to ground you should also get 230V but that voltage is accualy the voltage from A1 you are picking up as it is just passing through the coil. If you test between A1 and A2 with your multimeter you should get 0V until you press the START switch. Then you should get 400V at A1 and A2 (in my case 3 phase)

[@Strongs_G3528]

I just replayed your video...I think the part I was missing is the fact this you installed a 400 VAC contactor and when you press the start button, this provides the 400 VAC needed to energize the contactor coil. The 230 VAC received from L1 is not enough to energize the coil. Is this correct?

[@njokahchomba7342]

I have connected a 32 A dol 3 phase ,it is starting but the stop button not working,what could be the problem

[@njokahchomba7342]

Do you connect neutral to any terminal of the contactor?

[@p0we111]

A1 or A2 it does not matter, but A2 for tge neutral is just common practice. If there are two A2 contacts, any one of the two will be fine.

[@Xxxcappie23]

Do you have a schematic diagram for this

[@andrewnoblett9510]

How do I wire this on 240 v . Really struggling with it

[@p0we111]

Hi Andrew. If you are using 230v contactor follow these instructions: At the beginning of the video (1:27) instead of a bridge from L1 (red wire) to A1, use the NEUTRAL wire that you have. Then, treat the blue wire in the video as your LIVE wire (1:43 to 5:58)

[@andrewnoblett9510]

@@p0we111 hello thank you for replying . Yes it is 240 v it worked when I push the contact by hand . But won't work with the start button . It looks the same as your one but the numbers are different

[@p0we111]

@@andrewnoblett9510 Make sure that on youre overload you are using the NC (normally closed) contact. If you connected it to the NO (normally open) contact it wil only work if you the contactor.

[@andrewnoblett9510]

@@p0we111 thank you it was wired right the start switch was sticking it works now thank you ever so much

[@vijaymahto3532]

can we use dol starter for AC and Freeze

[@p0we111]

Hi Vijay. Yes you can switch anything you want with a DOL starter.

[@njokahchomba7342]

Is A2 fed by neutral ?

[@p0we111]

In a single phase contactor, yes the neutral is A2 but in a 3phase contactor the A2 is phase 2.