Where should current readings be taken on a WYE connected capacitor bank?

Taking current readings on a WYE connected capacitor bank involves monitoring the flow of electricity through the system to ensure proper functionality and safety. The most comprehensive and accurate approach is to measure the currents on each primary lead and at the neutral to ground connection.

In a WYE configuration, each leg of the capacitor bank is connected to a neutral point. By taking readings from each primary lead, you account for the current flowing through each branch of the bank, which allows for an analysis of the balance of the system. This balance is crucial for the stable operation of the bank and helps in identifying any potential issues such as overloads or imbalances that could affect performance.

Additionally, measuring at the neutral to ground connection helps in assessing the ground fault currents and verifying the grounding integrity of the system. Grounding is essential for safety, as it prevents dangerous overvoltages that can occur due to faults.

The other methods of taking current readings, such as only at the ground connection, on the secondary leads, or solely from the transformer output, do not provide a complete view of the system's operation and health. These options may overlook critical aspects of the capacitor bank's performance, which could lead to misdiagnosis of issues or an incomplete understanding of the electrical behavior