Voltage Stabiliser

[sponge23]

Even before the PV's were installed, the voltage was pretty high. The machines have 3P motors, and the control gear is 24V. Would the 24V PSU be affected by the incoming voltage fluctuating?

 

[Charlie_]

3p motors? 3 phase?
is the 24v DC or AC?
What sort of PSU is it?
you will also find that such devices are rated at 230v, as is the same with all electrical equipment throughout the UK and Europe.
They are designed with this in mind taking into account the respective tolerances

 

[Engineer54]

3p motors? 3 phase?
is the 24v DC or AC?
What sort of PSU is it?
you will also find that such devices are rated at 230v, as is the same with all electrical equipment throughout the UK and Europe.
They are designed with this in mind taking into account the respective tolerances

That would depend on how old these box making machines are. If manufactured pre harmonisation, eg 220 Volt generally with a typical +/-10% tolerance. Running at 240 volts will be at the very top end of that tolerance, and if there seeing closer to 250 volts, ...not very good at all!!

 

[Charlie_]

True if the equipment is rated at 220 and over 20 years old!
A simple check is to observe if the equipment has the CE mark..
in this case tho the equipment is not rated at 220v

 

[Knobhead]

When can we get rid of the myth of 230V?

The specification for new distribution transformers is 11/.433KV. NOT 11/.4KV

 

[shanky887614]

When can we get rid of the myth of 230V?

The specification for new distribution transformers is 11/.433KV. NOT 11/.4KV

for the rest of us that dont deal with transformers.

i know there is 400kv,33kv,11kv,415,230

is it only below 11kv that the voltage spec changed due to harmonization

 

[Knobhead]

400KV
275KV
132KV
33KV
11KV
3.3KV
660V
550V
433V

There is also 66KV in the northwest and 6.6KV in parts of London.

Voltage regulation with OLTC’s is usually at the 33/11KV level.

 

[Engineer54]

for the rest of us that dont deal with transformers.

i know there is 400kv,33kv,11kv,415,230

is it only below 11kv that the voltage spec changed due to harmonization

Forgetting about the 6.6KV supplies, as they are pretty rare these days, you'll only generally see 33KV and 11KV being transformed to a LV distribution. The higher KV rated systems being used for transmission duties over long distances. By far the most common local distribution is 11KV for supplying the DNO's LV distribution networks...