Wiring method of dry-type transformer

Dry-type transformer is a kind of power auxiliary equipment. Although it can bring us great convenience in function, we still have to maintain awe in use, especially when we use the wiring for the first time, we should Follow the principles of using dry-type transformers.

With the development of electric power, the use of transformers can be said to be more and more widespread, and the opportunities for people to access and use them are also increasing, especially in factories, when users use dry-type transformers for wiring methods It needs to be mastered. If there is a problem in the wiring, it is easy to cause a malfunction. And the safety of life.

Wiring method of dry-type transformer:

1. Short-circuit the "input" and "output" terminals of the transformer to test the insulation resistance between the transformer and the ground wire with a megohmmeter. When measuring with a 1000V megohmmeter, the resistance is greater than 2M ohms.

2. The cross-section wiring of the input and output power lines of the transformer should meet the requirements of the current value; it is appropriate to configure the current density in accordance with 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 color of the busbar of the transformer terminal block, yellow, green, and red. The neutral line should be connected to the neutral neutral line of the transformer, the grounding line, and the transformer. The shell and the transformer point are connected. The ground and neutral wires we usually talk about are drawn from the neutral point of the transformer. (For example, the transformer box should be connected to the corresponding ground mark of the box body). Check the input and output lines to confirm that they are correct.

4. First power on without load, observe and test that the input and output voltage meets the requirements. At the same time, observe whether the machine has abnormal noises, sparks, odors and other abnormal phenomena. If there is any abnormality, please disconnect the input power.

5. After the no-load test is completed and normal, the load can be connected.