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The TD-1330 is a portable instrument dedicated to on-site inspection of EV AC charging spot, with three-phase AC voltage measurements up to 300 V, three-phase AC current measurements up to 78 A, and AC electrical energy measurement available in class 0.05 / 0.1. The instrument can be combined with TK4720 AC adjustable resistive load to complete the metrology characteristics test and interoperability test of AC charging spot.