voltage stabilisers
Voltage Stabilisers Power Quality Applications FAQ Contact Home  


Q How do I install REO voltage stabilisers?

REO stabilisers are straightforward to install, but it does depend on the power of the unit. Smaller units can be run directly from a fused mains outlet, but larger units require their own mains live feed from the distribution panel at the installation site.


Q Is there any setup procedure which needs to be carried out?

No, all REO units are factory tested and calibrated to operate at their rated voltage and current. Just connect the input and output and switch ON! link to picture?


Q What about maintenance?

There are few moving parts in a REO Stabiliser. The majority of REO units use a unique ROLLER BRUSH link to picture? This means that maintenance is seldom required; however we do recommend that the brush is annually inspected to ensure that it remains in good condition.


Q What input voltage will REO Voltage Stabilisers accept?

Basically all of our stabilisers accept a 230 V, 50 Hz input voltage (or 3 x 400 V, 50 Hz) for three phase systems. The voltage tolerance is +/- 15% of nominal, so for a 230 V system the acceptable input is 195.5 V to 264.5 V

For this input range the output will remain at 230 V +/- 1.5%, so that is 226.5 to 233.45 V


Q What happen if the input voltage exceeds these limits?

The unit will still work, but the output will not be regulated to the 1.5% tolerance, but the output will be at least 15% better than the input, so for a -20% mains dip, the output will only drop by 5%.


Q How do I specify REO Voltage Stabilisers?

REO are aware that this can be difficult, which is why we have attempted to make our range as easy to understand as possible.

The main design criterion that we need to know is the power, in Watts (W) or Volt-Amps (VA) of the connected equipment, or failing that an indication of the normal running current.


Q How do REO Stabilisers actually work?

Using transformer technology the stabilisers add or subtract voltage from the mains supply, no electronics are involved in this power transfer, so there is high efficiency and no detrimental effect on the quality of the actual mains sinewave.


Q My mains voltage is 110 V, 60 Hz

No problem, your requirement is not a ‘special’ and will not be priced as such, but the power ratings are different for this voltage and we choose not to complicate our ratings tables. Just contact us with your voltage, frequency and power and we will offer exactly what you need.


Q What options are available?

Anything you want! However standard options are:

  Over/Under voltage alarms
  RFI Frequency Filters
  Surge/Spike suppression
  By-pass switches
  Additional circuit protection

Just let us know what you require and we will give you more details.


Q The power rating that I require is not listed in your table?

No problem, the table shows a range of commonly used units, again to prevent over complication we choose not to include every unit we are capable of manufacturing. Suffice to say, if you want it we will make it for you.


Q My mains input fluctuates by +/- 20%, can you offer something that will stabilise this?

As explained above, REO units will not stop working just because the voltage falls outside the standard input voltage range, however constant running in this condition should be avoided.

We can offer units with extended input ranges, contact us with your specific requirements.


Q My three phase load is asymmetrical, will the REO Stabiliser cope?

Do you mean that the current drawn from each phase is different? If so then, Yes the REO unit will work perfectly, provided that the total current per phase is within the rated current of the unit.


Q The individual phases of my three phase supply do not fluctuate symmetrically, how will the REO unit manage?

This is no problem; REO stabilisers are designed so that all three phases are monitored and regulated separately, to ensure your load receives the best possible supply.


Q My load draw a large surge current at start-up, will this cause a problem?

The REO design is very robust and short term overloads, caused by inductive loads, such as motors present on problem.

It is always helpful for us to know the load in advance, especially if it is a little unusual, if in doubt, contact us!


Q The output from my motor-driven generator is unstable, can I use a voltage stabiliser to solve this problem?

In theory yes, in practice no! Unfortunately, most generators of this type produce a very bad sine-wave which is difficult to accurately monitor. This obviously presents a problem when we try and alter the voltages. We can use different methods of monitoring in some circumstances; contact us with details of your application.

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