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

When installing current transformer clamps, it is important for the arrow on the clamp to indicate the direction of current flow. This is because current transformers are designed to measure the current flowing through a conductor by producing a proportional output current. The arrow serves as a guide to ensure that the clamp is correctly aligned with the direction of current flow in the conductor being monitored.

When properly aligned with the current flow, the current transformer will accurately measure and reflect the actual current passing through the circuit. This alignment is crucial for the accurate operation of protective relays and metering devices that rely on the data provided by the current transformer.

While other options may refer to orientations or directions, they do not align with the operational principles of a current transformer, which need to be installed with respect to the flow of current to function correctly.