A buck-boost transformer is a type of transformer used to make adjustments to the applied voltage to the alternating current equipment. Buck-boost connections are used in several places such as uninterruptible power supply units (UPS) for computers and in the tanning bed industry.
Buck-boost transformers can be used to power low-voltage circuits including controls, lighting circuits, or applications requiring 12, 16, 24, 32 or 48 volts, consistent with the secondary design. The transformer is connected as an isolation transformer and the nameplate kVA rating is the transformer capacity.
Video Buck-boost transformer
Apps
Buck-boost transformers can be used for electrical appliances with a fixed amount of money or encouragement. For example, a boost would still be used when connecting equipment upgraded to 230 V AC to a 208 V power source.
Units are rated in volt-ampere (most often, KVA kilo-volt amperes) (or less often, amperes) and are rated for percent drops of voltage or rise. For example, a buck-boost transformer rated 10% will increase the voltage provided by 208 V AC to 229 V AC. 10% buck rating will produce 209 V AC when the voltage provided is 230 V AC.
Maps Buck-boost transformer
Frequency
All transformers only operate with alternating current. Transformer only changes the voltage and current, not the frequency. Equipment that uses synchronous motors will operate at different speeds if operated in addition to the design frequency. Some equipment is marked on the board of his name to run at 50 Hz or 60 Hz, and only need voltage adjusted to the buck-boost transformer to produce the rated output voltage.
Consumer and business applications
Transformers can be semi-wired, in which the installer completes the last internal connection so that the unit makes the necessary amount of money or encouragement. The unit may have several taps on the primary and secondary coils to achieve this flexibility. They may be designed for preprogrammed installations (without plugs) or with plugs and containers to allow the same transformer to be used in several different applications. The same transformer can be rewired to increase or decrease the voltage by 5%, 10% or 15%. The main may have a combination of cables for dual voltage use: an example for AC V AC or 240 V AC applications, depending on the final cabling performed by the electrician.
Not all appliances require a voltage correction. This transformer is used when electrical equipment has a voltage requirement that is slightly out of tolerance with the incoming power supply. This is most common when using 240 V equipment in business with 208 V services or vice versa.
The equipment is usually labeled with a voltage rating, and can advertise the amount of tolerance to be received before a degraded performance or damage can be expected. A unit requiring 230 V AC with a 5% tolerance will not require a buck-boost transformer if the branch circuit (under load) is between 219 V AC and 241 V AC. Measurements should be made when the circuit is loaded, because the voltage can drop several volts compared to the open measurement. The transformer should be rated to carry a full load current or may be damaged.
See also
- Tap the modifier
- Buck-boost Converter
- Transformer type
References
Source of the article : Wikipedia
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