KVA stands for kilovolt-ampere and it is a unit of apparent power. It is important to calculate KVA on a 3 phase feed because it helps determine the maximum amount of power that can be delivered to a load without causing overload or damage to the system.
To calculate KVA on a 3 phase feed, you need to know the voltage, current, and power factor of the system. The formula is KVA = (Voltage x Current x √3) / 1000. The √3 represents the square root of 3, which is a constant for 3 phase systems.
KVA represents the total amount of power in a system, both real and reactive power. kW, on the other hand, only represents the real power or the actual amount of power being used to do work. KVA is important for sizing equipment and determining the capacity of a system, while kW is important for measuring energy consumption.
Yes, KVA can be higher than kW. This is because KVA includes both real and reactive power, while kW only represents real power. In systems with high levels of reactive power, the KVA may be significantly higher than the kW.
The KVA delivered on a 3 phase feed can be affected by factors such as the voltage level, the current level, and the power factor. Changes in any of these factors can result in a change in the KVA delivered to a load. Other factors such as temperature, harmonics, and power quality can also impact KVA.