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Types and Characteristics of Power Transformers

  Classified by Phase Number: (1) Single-Phase Power Transformer: Used for single-phase loads and in conjunction with three-phase power transformer banks. (2) Three-Phase Power Transformer: Used for raising or lowering voltage in three-phase systems.   Classified by Cooling Method: (1) Dry-Type Power Transformer: Cooled by natural air convection, generally employed for low-capacity power transformers used in local lighting, electronic circuits, etc. (2) Oil-Immersed Power Transformer: Cooled using oil as a cooling medium, such as self-cooling oil-immersed, oil-immersed with air cooling, oil-immersed with water cooling, and forced...

What Are the Differences Between Pad-Mounted Substations and Pad-Mounted Transformers?

1.Internal Components: Pad-Mounted Substation: A pad-mounted substation primarily consists of its internal transformer, electric energy metering equipment, high-voltage and low-voltage switchgear, as well as connecting cables and some auxiliary equipment. It serves as a mini-substation or a distribution station, supplying power to specific users. Pad-Mounted Transformer: A pad-mounted transformer mainly includes the transformer itself. It typically lacks electric energy metering equipment and high/low-voltage switchgear. Its primary function is voltage transformation, without providing power distribution or metering services. 2.Layout: Pad-Mounted Substation: In a pad-mounted...

How to Prevent Transformers from Being Struck by Lightning?

1.Positive Transformation Overvoltage: When the low-voltage side of a transformer is struck by lightning, the lightning current enters the low-voltage winding and flows through the neutral point grounding device into the ground. The grounding current generates a voltage drop across the ground resistance (Rjd). This voltage drop causes a rapid increase in the potential of the low-voltage side neutral point. It adds to the overvoltage on the low-voltage winding, posing a risk to the low-voltage winding. Simultaneously, this voltage...

Three-phase Voltage Regulator Principle and Operation Precautions

Principle of three-phase voltage regulator Three-phase voltage regulator is an adjustable autotransformer, can be used as a stepless smooth regulation of three-phase load equipment, also known as thyristor power regulator, thyristor power regulator or power regulator for short. The working principle of the three-phase voltage regulator is to connect the four-layer three-terminal semiconductor device to the middle of the power supply and the load, and to adjust the voltage, current and power added to the load with the corresponding trigger control...

Classification of Enamelled Wire

According to the coating is divided into: 1. Polyamine formate enameled wire (UEW) is divided into OUEW(Triple),1UEW(Heavy or Double), 2UEW(Single), and UEW is the most widely used type of linear, of which 2UEW and 1UEW are the most commonly used. Its characteristics are: the patent skin is removed before the solder is not used, and the solder can be directly immersed in the tin furnace. Its form is divided into single strand, multi-strand stranded wire (LITZ, also known as Li branch) and...

Principle of Isolation Transformer

The principle of isolation transformer is the same as that of ordinary transformer. They all use the principle of electromagnetic induction. Isolation transformers generally refer to 1:1 transformers. Because the secondary is disjointed. There is no potential difference between any of the secondary wires and the ground. Safe to use. Commonly used as a maintenance power supply. Isolation transformers are not all 1:1 transformers. The power supply for the control transformer and tube equipment is also an isolation transformer. Power...

Working Principle of Inverter Transformer

Structural characteristics of inverter transformer: 1. The coil is made of F or C grade paint multi-cake winding, arranged tightly and evenly, the appearance is not covered with insulation layer, with excellent beauty and good heat dissipation performance. 2. The core joint is welded by sub-arc welding, the coil and the core are assembled into one after pre-drying → vacuum dipping → hot curing this process process makes the transformer coil and the core firmly combined together, not only greatly reducing...

How to Use Transformer Winding Machine Rationally?

1. Correctly set the parameters of the transformer winding machine Whether the winding machine can work correctly plays a key role, transformer winding machine is different from other winding machine is a slow running equipment, because the production process of the transformer determines the frequent start and constant torque requirements of the equipment, the number of turns set is the number of turns the equipment needs to run according to the production process, it is divided into the total number...