!#1: Promo European Voltage Transformer: October 2011

!: Rating & Selection Of Power Voltage Transformers

Rating a Transformer

While making a choice for the transformer, more than just turns ratio must be considered. Such other determinants include voltage, current and power handling capabilities of primary and secondary windings.

The maximum voltage that can be applied to a winding depends upon the type and thickness of the insulation. Better and thicker will be the insulation, higher will be capacity of the voltage rating.

The current carrying capacity of the transformer can be determined by measuring the diameter of the wire used for winding. If the current exceeds the capacity, there will be overload resulting in loss of the current in the form of heat.

This dissipated heat can break the insulation, causing the wire to break down. And thus the transformer may be permanently damaged.

The capacity of voltage transformers mainly depend upon its ability to dissipate heat. If excessive heat can properly be removed, the current carrying capacity of transformer can be substantially increased. This power-handling capacity of the transformer can be measured in either volt ampere unit or the watt unit.

Selection of right Voltage Power Transformers

Some of the major factor that should be considered while selecting the transformer for your power applications are as follows:

The transformer should be capable of handling the expected loads (Also some amount of overload in emergency) Always check, if there is a possibility of increasing the load carrying capacity of the transformer. The investment and decision made should be based on certain life expectancy. Also consider the operational and installation cost beforehand to finalize your budget.