Voltage problem

ChumpusRex

I've been burning through halogen transformers and strip light fittings faster than I would have expected.

I've checked my mains voltage and it between 253 and 255 volts for a significant proportion of the time.

Ideally, I'd like this lowered a bit. What is the procedure for getting this sorted? Is the DPF the first port of call?

Consumerist

ChumpusRex wrote: »

. . . I've checked my mains voltage and it between 253 and 255 volts for a significant proportion of the time. . .

The standard nominal supply voltage in domestic single-phase 50 Hz installations in the UK is 240 V AC (RMS), but since 1 January 1995 (Electricity Supply Regulations, SI 1994, No. 3021) this has an asymmetric voltage tolerance of 230 V +10% −6% (i.e. 253 – 216.2 V).

It looks as though your supply voltage is within the tolerance in the regulations so your problem is more likely to be associated with noise/spikes on your supply or the quality of the transformers you are using.

Edit
Another possibility is that you may be overloading the transformers. Check their load limit.

JC_Derby

Above 253 is out of statutory limits. You need to speak to your local DNO who will come and verify your readings and should also check ELI readings at your cut out position. If your volts are found to be out of limits on their calibrated volt meter it is their responsibility to change this to make sure you are within the stat. Volt limits.
There maybe reasons you are not, high ELI reading. High volts at local transformer etc etc but ultimately it's a DNO issue if volts are high on their side.

You could also ask them to install a voltage recorder.
They should respond quickly to you telling them the volts are 255.