When installing current transformer clamps, in which direction should the arrow point?

When installing current transformer clamps, it is essential for the arrow on the clamp to point in the direction of current flow. This is because current transformers are designed to accurately measure the current flowing through a conductor, and their operation depends on how they are positioned relative to that flow.

The arrow on the clamp indicates the orientation in which the transformer must be installed to ensure that the measured current is correct. When the transformer is installed with the arrow pointing with the current flow, it effectively captures the magnetic field generated by the current. This allows the transformer to produce an accurate output proportional to the primary current flowing through the conductor.

In contrast, if the transformer is installed in the opposite direction or randomly, the readings may be inaccurate or even negative, leading to miscalculations in electrical measurements and performance evaluations. This highlights the importance of correct installation in line with the flow of current for effective and accurate performance of current transformers.