Dry Type Transformer Wiring Method

1. Short-circuit the "input" and "output" terminals of the transformer and use a megger to test the insulation resistance between it and the ground wire. When measured with a 1000V megger, the resistance is greater than 2M ohms.
2. The cross-section wiring of the input and output power cords of the transformer should meet the requirements of its current value; it is appropriate to configure it according to the current density of 2-2.5A/min2.
3. The input and output three-phase power lines should be connected to phase A, phase B, and phase C respectively according to the colors of yellow, green, and red busbars on the transformer wiring board. The neutral line should be connected to the neutral zero line of the transformer. The ground wire, transformer The shell and the center point of the transformer are connected. The ground wire and neutral wire we usually talk about are drawn from the neutral point of the transformer. (If the transformer has a cabinet, it should be connected to the ground wire mark on the cabinet correspondingly).
Check the input and output lines to make sure they are correct.
4. Turn on the power without load first, and observe and test that the input and output voltages meet the requirements. Observe the machine at the same time
Check whether there are abnormal noises, sparks, odors or other abnormal phenomena inside. If there is any abnormality, please disconnect the input power immediately.
5. After the no-load test is completed and normal, the load can be connected.