Article 4.11.1G : 3 Phase ammeter selector switch connection with 1 Ph Amp meter (Alpha A).

Please find the below image of 3 phase ammeter selector switch connection diagram with 1 phase Alpha A Amp meter. With the help of selector switch, we can measure Three-phase current in single-phase Ampere meter.

Here L1, L2, L3 denotes RYB of 3 Phase. S1 of R, Y, and B phase connected to RST accordingly. S2 of all 3 phases will loop and connect to the A2 terminal of the selector switch. And as shown in the image  1 phase Amp meter S1 and S2 connected to A1 and A2 of selector switch.

With the help of a rotatory selector switch we can measure three phase RYB Amp.

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