Wiring method of dry-type transformer

1. Use a megohmmeter to test the insulation resistance between the "input" and "output" terminals of the short-circuit transformer and the ground wire. When measuring with a 1000V megohmmeter, the resistance is greater than 2M ohms.
2. The cross-sectional wiring of transformer input and output power lines should meet the requirements of their current values; It is advisable to configure according to a 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 according to the color of the transformer terminal block busbar yellow, green, and red, respectively. The neutral line should be connected to the neutral neutral line of the transformer transformer, and the grounding wire, transformer casing, and transformer center point should be connected The ground wire and neutral wire we usually refer to are led out from the neutral point of the transformer. If the transformer has a chassis, it should be connected to the ground wire mark corresponding to the chassis.
Check the input and output lines to ensure they are correct and error free.
4. First, power on without load and observe that the input and output voltages meet the requirements. Simultaneously observe the machine
Is there any abnormal noise, ignition, odor or other abnormal phenomena inside? If there is any abnormality, please immediately disconnect the input power supply.
5. After the no-load test is completed and normal, the load can be connected.