Zellweger mains signalling for switching off peak loads

[marconi]

I thought folk might be interested in the Zellweger mains signalling system which I discovered yesterday. My sister wanted to know if she had economy 7 electricity in her rented home. She described to me the intake which as well as the cutout, meter and CU included a 'small black shoebox'. It turned out to be a radio teleswitch.

In looking for images 'of the 'small black shoe box' to email her I discovered Zellweger mains signalling. In this system a coded tone at 1050Hz is superimposed on the 50Hz mains voltage which receivers in consumers premises decode to switch off-peak loads.

Further details can be found here:

Zellweger off-peak - Wikipedia - https://en.wikipedia.org/wiki/Zellweger_off-peak

and

I don't think we use it in the UK or Europe. The items I read refer to Australia and New Zealand.

Does anyone know how good or troublesome it is in practice?

 

[Bobster]

Seen it used in Australia to switch street lighting on and off. They had control box's dotted around the site powering other equipment and they were a source of power for the street/road/pathway lighting around the site.

Didn't really chat about maintenance aspects of it. Although the generator used to superimpose the sine wave sounded weird running.

 

[Pete999]

I thought folk might be interested in the Zellweger mains signalling system which I discovered yesterday. My sister wanted to know if she had economy 7 electricity in her rented home. She described to me the intake which as well as the cutout, meter and CU included a 'small black shoebox'. It turned out to be a radio teleswitch.

In looking for images 'of the 'small black shoe box' to email her I discovered Zellweger mains signalling. In this system a coded tone at 1050Hz is superimposed on the 50Hz mains voltage which receivers in consumers premises decode to switch off-peak loads.

Further details can be found here:

Zellweger off-peak - Wikipedia - https://en.wikipedia.org/wiki/Zellweger_off-peak

and

I don't think we use it in the UK or Europe. The items I read refer to Australia and New Zealand.

Does anyone know how good or troublesome it is in practice?

Rene might know, sorry I'm feeling mischievous today