The difference between the two is the circuit power supplied as well as unit conversions. The automatic regulator has a few features that are different from the constant regulator; there is an alarm that sounds when an over-voltage is happening, and a time delay protection. It can also give you an extra low supply of power for when you are making use of the usual house hold appliances, which makes this device popular for domestic use. As for the constant inverting power supply, this is able to run with the use of a generator, therefore allowing you to have an unlimited power supply system in place.
For most applications Servo Electronic (AKA Electro-Mechanical) based Voltage Stabilizers & AC Power Conditioners have proved to be a very reliable and cost-efficient voltage stabilisation solution, with models readily available to accommodate an input voltage swing of in excess of 40% whilst still delivering an accuracy of 1% on the output.
Comprising a transformer having its secondary winding connected between the mains supply and the load, the primary voltage is automatically controlled through a motor driven variable transformer - ensuring a continuous, smooth and very stable output voltage.
High Voltage / Transient Spikes are normally limited by the inclusion of 'Spike Clippers'. Such clippers typically limit transients to twice the peak voltage of the supply. However buyers should be aware that to reduce spikes to totally harmless levels it is often necessary to request that your supplier fits additional Spike Attenuation protection.
While Electronic Servo stabilisers do contain some moving parts, experience over the last 25 years in some of the most demanding power conditions has proved the design to be a very reliable method of delivering voltage regulation with only a low-level of ongoing maintenance required being deliverable by universally readily available skill sets.
The long-life expectancy, compact size and low cost of ownership makes servo electro-mechanical stabilisers economical solutions for a wide variety of applications in industry, commerce, mining, aerospace, computing and telecommunications and is normally the recommended design solution for most applications.
Advantages:
- Very competitively priced
- Negligible output waveform distortion
- Not Frequency dependent
- Size and weight advantages over other methods of stabilisation
- Will attenuate voltage spikes if required
Disadvantages:
- Moving parts requiring limited maintenance
- Lower speed of response compared to solid state designs