How to connect a smart switch without N to a contactor in a 2-wire installation?

Hi.
I'd like some advice, I'm more concerned with gaining theoretical knowledge as this is more of a conundrum that an electrician will have to deal with, namely.
I have a street light which I switch on with a normal light switch and a contactor is switched on, I wanted to install a smart switch so that this light starts automatically etc.
The switch has a two wire installation, black phase and blue where the voltage appears when the light is switched on.
I fitted the smart switch to the installation without Neutral initially without the capacitor that was attached for proper operation without the Neutral wire and when I turn on the light the contactor starts the lighting comes on, but after a fraction of a second it turns off because the switch loses power and regains it after a while.
When I fitted a capacitor it works in a similar way, only that the power is maintained for a while longer and then it goes out again and switches off.
Would anyone be so good as to advise if there is any way to make this switch work?
I would add that there is a spare yellow/green wire in the box from the switch and once fetched I consulted an electrician he said it could be used to power this switch.

It's not working properly because you don't have a load just a contactor coil.
When does this lighting come on? You can give something else.

You have connected it incorrectly according to the diagram
it is supposed to be:



you have done :

konsum wrote:

Add that in the box from the switch there is a free wire in yellow-green colour and once downloading I consulted it with the electrician and he said that it can be used to power this switch.

Tell the electrician to suggest such a solution at the qualification exam (he passes one every 5 years).

tos18 wrote:

Tell the electrician to propose such a solution at the qualification exam (he passes one every 5 years).

I think what he meant was that you can switch this wire in the switchboard and make it neutral.

tos18 wrote:

You have connected this contrary to the schematic

Unfortunately I have no way of getting to those tubes to connect that capacitor there.
But is the capacitor to blame for this switch not working properly?

Added after 2 [minutes]:

78db78 wrote:

When does this lighting come on?

I start it manually with a switch and it is switched on by a contactor.

78db78 wrote:

When does this lighting actuate?

78db78 wrote:

You can give something else

I.e.?

konsum wrote:

I start it manually with a switch and it is switched on by a contactor.

78db78 wrote:

When does this lighting come on?

78db78 wrote:

You can give something else

I.e.

Astronomical clock programmer.

konsum wrote:

tos18 wrote:

Tell the electrician to propose such a solution at the qualification exam (he passes one every 5 years).

I think what he meant was that you can switch this wire in the switchboard and make it neutral.

hands are falling off.

konsum wrote:

Unfortunately I have no way of getting to those lamps to connect that capacitor there.

Why to the lamps if the switch controls the contactor ? - in parallel to the coil of the contactor.

78db78 wrote:

Astronomical clock programmer.

Installed in the switchboard next to the contactor where N will be available.