What is the maximum allowable voltage imbalance in a refrigeration system?

In refrigeration systems, maintaining proper voltage balance across three-phase motors is crucial for optimal performance and longevity. A voltage imbalance can lead to overheating, excessive current draw, and potential failure of the motor. The acceptable level of voltage imbalance ensures that the motors operate efficiently and reliably.

The maximum allowable voltage imbalance is typically set at a limit of 2%. This means that the voltages across the three phases should not differ from one another by more than this percentage. If the imbalance exceeds this threshold, it can adversely affect the motor operation, leading to reduced efficiency, increased wear, and even catastrophic failure over time.

Choosing a limit of 5% or 10% would allow for a greater degree of imbalance, significantly increasing the risk of damaging effects on the system and associated components. Therefore, adhering to the 2% standard is essential for maintaining equipment health and ensuring reliable system operation.