The user must master the wiring method when using the dry type transformer, if there is a problem in the wiring, it is easy to lead to the use of failure. So what is the wiring method of the dry transformer? The following Xiaobian will introduce it in detail.
Dry type transformer wiring method:
1. The "input" and "output" terminals of the short-circuit transformer are tested with a megohm meter for their insulation resistance with the ground wire. When measuring with a 1000V megohm meter, the resistance value is greater than 2M ohms.
2, transformer input, output power line section wiring should meet the requirements of its current value; The current density of 2-2.5A/min2 is recommended.
3, the input and output three-phase power lines should be connected to phase A, phase B and phase C according to the color yellow, green and red of the transformer busbar, and the neutral line should be connected to the neutral line of the transformer transformer, the ground line, the transformer shell and the central point of the transformer. Usually, the ground and neutral lines we say are drawn from the neutral point of the transformer. (If the transformer has a chassis, it should be connected with the ground line mark corresponding to the box). Check the input and output lines to make sure they are correct.
4, first no-load power, observe the test input and output voltage meet the requirements. At the same time, observe whether there is abnormal noise, spark, odor and other abnormal phenomena inside the machine, if there is an abnormal, please disconnect the input power immediately.
5, when the no-load test is completed and normal, the load can be connected.