Correct Pole Connection is Crucial
The polarity connection of a current transformer is paramount. Incorrect polarity connection can affect the accurate metering of electrical energy and may even cause short circuits, especially when multiple current transformers are connected in parallel on the same line. Therefore, it is essential to ensure that the number of poles of the current transformer is correctly connected according to the polarity markings.
Reliable Secondary Grounding is Essential
To prevent high voltage from entering the low-voltage side after insulation breakdown between the secondary windings, endangering personal and instrument safety, the secondary side of the current transformer should have a protective grounding point, and this grounding point should be reliably connected. Furthermore, to ensure grounding safety, the terminal closest to the current transformer's enclosure is typically used as the grounding point.
Secondary Open Circuit is Prohibited During Operation
During the operation of a current transformer, it is crucial to ensure that the secondary windings are in a closed state; open circuits are strictly prohibited. Open circuits in the secondary windings can lead to serious consequences, including high voltage output, equipment damage, and personal safety risks. Therefore, the operating status of the current transformer should be monitored at all times to ensure its safe and reliable operation.