Welcome. To use the tool please watch the video linked above and then simply answer the following 6 or so questions to identify the solutions best suited to your requirements.

Input Supply
Select the required 50/60Hz input power supply type. The primary options being Single or Three Phase. Split Single Phase / Two Phase supplies (eg 240V/120V) are for the most part only to found in North American residential and light commercial buildings.
Supply Configuration
Select the appropriate Three Phase incoming utility power supply configuration . 4 Wire being Wye configured offering three phases + Neutral (+Ground /Earth) – sometimes also referred to as a 5 Wire System. While 4 Wire Wye is the most common three phase configuration, in certain countries and applications you may find that the three phase input supply is only available in a 3 Wire, Delta configuration - 3 Wires being three phases (+Ground /Earth) – ie NO NEUTRAL.
Power Rating
Select the power rating (in terms of kVA) of the load you wish to protect. Please ensure you do make suitable allowance for any future expansion.
Nominal Input Voltage
Select the appropriate Nominal Input Voltage – ie the nominal voltage on the site where the Stabiliser / Conditioner is to be installed. For example in a three phase supply - for 400V select the range 380 to 415V (European / International Norm) - or – for 208V select the range 190 to 240V - or – for 480V select the range 440 to 480V (US Norms). For example in a single phase supply - for 230V select the range 220 to 240V (European / International Norm) - or – for 120V select the range 100 to 127V (US Norm).
Output Voltage
Select the Output Voltage required from the AC Voltage Stabilizer /Power Conditioner. Where a Three Phase configuration has been previously selected, Output Voltages available will show the Phase to Phase voltages. Where a Step Up or Step Down of the utility voltage supply is required the output voltages available will also be listed.
Output Voltage Accuracy
Please selected from the available list the accuracy required on the output voltage. Typically ‘1% or better ‘ should be selected, but for less voltage sensitive loads other options available may prove to return more cost efficient solutions.
Input Voltage Window
This is the input voltage window the Stabiliser / AC Power Conditioner is normally expected to operate within. Expressed as a percentage of the nominal input voltage supply, for most advanced economies, with relatively stable utility supplies, +/-15% or +/-10% window is usually more than sufficient. A larger window may be necessary for more remote locations. In less advanced economies, where the power source is more unstable, a wider input voltage window will almost certainly be required. As the wider the input voltage window required, the greater the cost of the stabilizer / conditioner will be, it is always a good idea to have a firm idea as the extent of the voltage problems you may be experiencing or wish to protect against!

The following models meet your selected criteria -

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AC Voltage Stabilisers / Regulators Action
SES-55LY-3P-S30 (190V) - Indoor - IP20 / NEMA 1
55 kVA Three Phase Indoor Servo Electronic AC Voltage Stabilizer
OSES-55LY-3P-S30 (190V) - Outdoor - IP54 / NEMA 3
55 kVA Three Phase Outdoor Servo Electronic AC Voltage Stabilizer

AC Power Conditioners Action
PCS-55LY-3P-S30 (190V) - Indoor - IP20 / NEMA 1
55 kVA Three Phase Indoor Servo Electronic AC Power Conditioner
OPCS-55LY-3P-S30 (190V) - Outdoor - IP54 / NEMA 3
55 kVA Three Phase Outdoor Servo Electronic AC Power Conditioner

FAQ AC Voltage Stabiliser or Power Conditioner?
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