electrickery.

[Scruples]

I disconnect fridges and freezers during a low voltage period. I believe the lower voltage means higher current which can damage the mtor/pumps.

Whilst it's true that higher voltages generally means lower currents and vice versa, in supply terms, it isn't true when the resistance/impedance is a constant. It may be that at a lower voltage the motors may struggle and overheat with the same, or lower current and cause the overheat cut-out to operate.

However, disconnecting appliances during any supply fluctuations, especially caused by lightning, is a wise move.

 

[Phil Pascoe]

I've not known any fluctuation before, it's been either on or off.

 

[Crazy Dave]

I wonder what the probability is that all the domestic feed in systems are all 100%effective in turning off when the network fails. Is there a possibility that very low voltage could arise from a defective domestic PV system locally? I know it shouldn’t happen in theory.

Exactly what I thought, I have seen what you said happen first hand. It only takes one faulty inverter to not shut down during a power outage to send enough voltage for another inverter to see the voltage and so stays active and so on. Potentially very serious for anyone working on the grid.

 

[clogs]

another reason to be self sufficient with solar I think.....
be good if at least 50% of households had solar.....
then perhaps these over paid moneys might do a better job.....?

the way I see it, it will only get worse......

 

[Scruples]

I've not known any fluctuation before, it's been either on or off.

Not during a storm? Lightning? Major industry in the area? That is surprising.

 

[Phil Pascoe]

Even in storms it tends to be either on off off. There is no major industry in our area.