Load box voltage transformer field calibration: Connect the transformer according to the wiring diagram,串联 the load box between the secondary terminals a and x of the voltage transformer under test. Ensure that the load box grounding point is reliably grounded. Adjust the load box to the actual secondary load of the current transformer under test. Select the power factor positions of 0.8 and 1.0. Short-circuit and ground the secondary circuit of the voltage transformer. During the operation, ensure that the secondary winding of the voltage transformer has only one maintenance grounding point. The experimental wiring should be correct, and the secondary winding under test and other secondary windings must not be short-circuited. The inspection work must be carried out carefully and meticulously, with double-checking and familiarity with the performance of the testing equipment and methods. Therefore, we must strictly follow the work sheet and maintain all sections of the load box. Aviation ground power 2, 36V aviation power 1, 400HZ frequency converter power 7, 115/200V power 2, 27V DC power 5, 400HZ power 12, aviation power
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