KVA Theoretical Production; mostly AC
KW Actual consumption & DC
KVA is used for electricity producing devices AC mostly; thus is mostly used for theoretical power production calculations.
KW is used for Loads; electricity consuming devices DC mostly; thus is mostly used for theoretical and actual DC electrical power consumption calculations.
KW is used for Loads; electricity consuming devices DC mostly; thus is mostly used for actual power consumption calculations.
Real Power is the DC power; where only resistive loads are present.
Reactive power is the power lost due to an inductive capacitive circuit; not present in a DC resistance circuit.
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Power Triangle
Power indicated on electrical equipment’s manual or passport is the amount of power that can be produced by this device or system under ideal operating conditions; where losses & inefficiencies are minimised. It is calculated as per equipment's performance under ideal conditions; not based on the device's specifications and design, taking into account any conditions & external factors that could affect its performance and customising them to get maximum output from the equipment.
Equipment’s or Device’s power; indicated on its passport or manual; is the maximum amount of power that can be produced by a device or system under ideal conditions, assuming that there are no losses or inefficiencies. It is usually calculated based on the device's specifications and design, without taking into account any external factors that could affect its performance.
Actual power, on the other hand, is the amount of power that is actually being used or consumed by the device or system in real-world conditions. This can be affected by a number of factors, including the quality of the power source, the efficiency of the device or system, and the operating conditions. Actual power refers to the amount of power that is actually being used or consumed by the device or system at any given time. The difference between the two can be caused by several factors, including inefficiencies in the system or the device, or the fact that the device or system is not being used to its full capacity.
In comparison, the actual power output of a device or system is always less than its theoretical power output, due to the presence of losses and inefficiencies; such as weather operating conditions, heat or friction.
There are several common factors that can cause a difference between the Equipment’s or Device’s power indicated on its passport or manual power and actual power due to:
1. Inefficiencies in the system or device as heat or other forms of energy.
2. Environmental factors: high temperatures & humidity can reduce the efficiency of electronics, while low temperatures can cause batteries to lose power because they heat in order for the device to operate.
3. Operating conditions: The way in which a device or system is used can also impact its actual power output; if a device is used at full capacity for an extended period of time, it may not be able to maintain its theoretical power output due to heat buildup or battery drain and wear.
4. Maintenance and wear: Over time, devices and systems can wear out or become less efficient due to dirt, corrosion, or other factors.
5. Load demands: The actual power output of an equipment or system may also be affected by the demands placed on it by the load it is powering; if the load requires more power than the device or system can provide; it would heat.
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