Grid voltage at the consumer unit of a house?

[treezleef]

Hello,
We have installed equipment at a customer location, (or rather, an external electrical contractor installed it for us). The equipment is internet monitored by us…..and we are noticing that the Grid voltage is regularly falling to 225VAC. Our equipment disables at this low grid voltage.

We are trying to find out if the reason for the low grid voltage is because the wiring that the electrician used was too thin in gauge (too resistive). Then, the current flow through it would make the voltage at the equipment terminals be low, due to the resistive voltage drop.

So we want to find out what is the true grid voltage at the consumer unit of the house?
Can smart meters give a grid voltage measurement.?

Is there any safe way that we can get the customer to probe the grid voltage at his consumer unit?

 

[Petej999]

Hello,
We have installed equipment at a customer location, (or rather, an external electrical contractor installed it for us). The equipment is internet monitored by us…..and we are noticing that the Grid voltage is regularly falling to 225VAC. Our equipment disables at this low grid voltage.

We are trying to find out if the reason for the low grid voltage is because the wiring that the electrician used was too thin in gauge (too resistive). Then, the current flow through it would make the voltage at the equipment terminals be low, due to the resistive voltage drop.

So we want to find out what is the true grid voltage at the consumer unit of the house?
Can smart meters give a grid voltage measurement.?

Is there any safe way that we can get the customer to probe the grid voltage at his consumer unit?

c

 

[Petej999]

c

Contact the DNO

 

[UNG]

With the UK nominal voltage being 230v +10/-6% your equipment doesn't have an operating voltage window to match these limits with the minimum voltage limit being 216.2v

 

[UNG]

Contact the DNO

And you can expect them to do absolutely nothing, they may install a voltage recorder but if it is within the lower and upper limits then they will do nothing other than advise it is within limits
Which is exactly the response I got from ENWL when my voltage was fluctuating between 221v and 251v over a number days / weeks which I had recorded with my own PQA