The step-down transformer is to transform the higher voltage of the finger input terminal into an ideal output voltage which is relatively low, so as to achieve the purpose of step-down transformer. The step-down transformer is a very important device in the power transmission and transformation system. The normal operation of the step-down transformer not only relates to its own safety and the user's reliable power supply, but also directly affects the stability of the power system.
The configuration of the step-down transformer protection should satisfy the requirement that in any case, the transformer cannot be burned, the accident will be expanded, and the stability of the power system will be affected. Detailed description of its working principle, relay protection principle, operating conditions, operation and requirements, and abnormal operation and processing methods.
In the power system, the step-down transformer is one of the most important electrical components. The relay protection device is an important guarantee for the normal operation of the power system. With the continuous development of society, rapid economic development, and continuous improvement of living standards, people's demand for power has gradually increased, which puts forward higher requirements for step-down transformer relay protection. For the design of relay protection, we should make relay protection design from these aspects from its protection principle, specific relay protection measures for transformer faults, and the importance of relay protection.
It is the principle of electromagnetic induction. Now the single-phase two-winding transformer is taken as an example to illustrate its basic working principle : When a voltage is applied to the primary winding, an alternating magnetic flux is generated in the iron core. These magnetic fluxes are called The main magnetic flux, the main magnetic flux will pass through, once, the secondary winding, the induced electromotive force will be generated in the winding. At this time, if the secondary side is connected to the load, the current will flow out and generate electricity.