Test method for several switching power transformers

　　Author ：Iflowpower – Portable Power Station Supplier

The test method of the switching power supply transformer has the following: 1, insulation test. Using the multimeter R ¡Á 10k to pass alone, the iron core and primary, primary and minority, core and minority, electrostatic shielding layer, the resistance value between the secondary windings, the multimeter pointer should refer to infinity move. Otherwise, it is clarified that the transformer is insulated.

3. After investigation the surface of the transformer to see there is no significant abnormal phenomenon. If the coil lead is cracking, it is soldered, the insulating material has no burnt traces, and the core fastening screw has no loosening.

The silicon steel sheet has rust-resistant, and the winding coil has no exposure. 3, distinguish between the initial and secondary coils. The primary pin and secondary pin of the power transformer are generally levered from both sides, and the primary winding multi-labeled 220V words, the secondary winding marks an additional voltage value, such as 15V, 24V, 35V, etc.

Then identify according to these symbols. 4, the test of the coil. The multimeter is placed in the R ¡Á 1 gear.

In the test, if the resistance value of a winding is infinite, the winding is disconnecte.