Voltage stabilizers are electrical devices that delivers constant voltages to a load at its output terminals, regardless of the changes in the input or incoming supply voltage. It protects the equipment or machinery against over-voltage, under voltage, and other voltage surges. However, there are 5 basic things to check before buying a voltage stabilizer.

# Firstly, it is highly recommendes that you know how much capacity of voltage stabilizer you need. This involves making a list of all the items or equipments you need to load or power on the stabilizer. The power factor of each of the items could be seen around the plug section of the appliance or on the carton of the product, which are mostly in watts, KW, KVA or in Amps.

# Another important factor is to note the number of phases you use at your facility, being it a 3-phase, or a single phase. In
other to know if you qould be using a single phase or a 3-phase voltage stabilizer, you would need to check the number of cut-out switches you are using at any point in time on the facility. If you are using a single phase, it simply means you should be using a single phase stabilizer, and for those using a 3-phase power supply, it should be noted that a 3 separate stabilizer of single phases each should be used, or a single 3-phase voltage stabilizer with the right capacity.

# You need to know your prevailing high and low voltages: It is also very good to know or note how low your voltage is when the voltage is very low and very high. This would help you select the right type of stabilizer with the right input voltage range. Should your current be lower than the input voltage range of your voltage stabilizer, then, the stabilizer would trip off or show ‘error’ message on the voltage stabilizer screen.

# The voltage fluctuation rate in your area would help your voltage stabilizer. In an area with very frequent voltage flunctuation, a servo type of voltage stabilizer would be able to manage this better. The servo voltage stabilizer protects the equipment from high and low voltage problems, providing stable altetnate current output voltage, where the input power supply voltage changes drastically. But when the rate of fluctuation

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