What is the purpose of a CT in solar PV monitoring?

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What is the purpose of a CT in solar PV monitoring?

Current transformers in PV monitoring are used to measure the flow of alternating current in the system. They work by clamping around a live conductor; the changing magnetic field from the AC current induces a proportional current in the transformer's secondary winding, which the monitoring equipment reads to determine how much current is flowing. Because this mechanism relies on changing current, a CT measures AC, not DC. The measurement it provides lets the system track output, import/export, and overall performance. It is not a device for storing energy, nor does it convert DC to AC. Overcurrent protection is handled by protective devices like fuses or breakers, not by the CT itself.

Current transformers in PV monitoring are used to measure the flow of alternating current in the system. They work by clamping around a live conductor; the changing magnetic field from the AC current induces a proportional current in the transformer's secondary winding, which the monitoring equipment reads to determine how much current is flowing. Because this mechanism relies on changing current, a CT measures AC, not DC. The measurement it provides lets the system track output, import/export, and overall performance. It is not a device for storing energy, nor does it convert DC to AC. Overcurrent protection is handled by protective devices like fuses or breakers, not by the CT itself.

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