A Brief Discussion on the Rescue and Precautions for Electrical Transformer Fires
Release time:
2021-09-10 15:22
Source:
Construction and Basic Principles of Transformers:
1. Construction of Transformers:
A. A transformer, also known as a converter, is an electrical facility that converts high-voltage electricity produced by power plants into low-voltage electricity required by electrical appliances during long-distance transmission of electrical energy. It has multiple functions such as voltage transformation and current transformation. According to the role in power transmission and distribution, it can be divided into step-up, step-down, and distribution transformers. According to different cooling media, it can be classified into three types: air-cooled, dry-type, and oil-immersed. Among them, the oil-immersed transformer is the most commonly used type, mainly consisting of the main part (core and coil), cooling part (oil tank and heat dissipation pipe), lead-out device (insulation bushing and tap switch), and protection device (oil storage cabinet, explosion-proof pipe, gas relay).
B. Working Principle of Transformers: A pair or three pairs of coils (single-phase or three-phase) are wound around a closed core. The coil connected to the power source is called the primary coil (first or primary coil), while the coil connected to the load is called the secondary coil (second or secondary coil). When the primary coil is connected to an AC power source, current flows through it, generating an alternating magnetic flux Φ in the closed core. This alternating magnetic flux Φ simultaneously passes through both the primary and secondary coils. According to the principle of electromagnetic induction, the primary coil generates self-induced electromotive force, and the secondary coil generates mutually induced electromotive force. When a light bulb (load) is connected to the secondary coil, the light bulb lights up, and current flows through the circuit.
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