Phase:Three Coil Structure:Toroidal Coil Number:Autotransformer Type:Oil-type Material:Copper Winding Rated capacity:10KVA-50000 KVA Cooling Method:ONAN Frequency:50/60Hz Rated voltage:0.4KV-110 KV
A power transformer is a kind of stationary electrical equipment. It is a device used to change an AC voltage (current) of a certain value into another voltage (current) of the same frequency or different values.
Power transformer is one of the main equipments of power plants and substations. The role of the transformer is not only to increase the voltage to send electrical energy to the area where it is used, but also to reduce the voltage to the voltage used at all levels to meet the demand for electricity. In short, both step-up and step-down must be done by a transformer. In the process of transmitting electrical energy in the power system, voltage and power losses will inevitably occur. When the same power is transmitted, the voltage loss is inversely proportional to the voltage, and the power loss is inversely proportional to the square of the voltage. The transformer is used to increase the voltage and reduce the transmission loss.
A transformer is composed of two or more coil windings wound on the same iron core. The windings are connected by an alternating magnetic field and work according to the principle of electromagnetic induction. The installation position of the transformer should be considered for easy operation, maintenance and transportation, and a safe and reliable place should be selected. When using a transformer, the rated capacity of the transformer must be selected reasonably. When the transformer is running at no load, a large amount of reactive power is required. This reactive power is supplied by the power supply system. If the capacity of the transformer is selected too large, not only the initial investment will be increased, but also the transformer will be in no-load or light-load operation for a long time, which will increase the proportion of no-load loss, reduce the power factor, and increase network loss. reasonable. If the transformer capacity is too small, the transformer will be overloaded for a long time and the equipment will be easily damaged. Therefore, the rated capacity of the transformer should be selected according to the needs of the power load, and it should not be too large or too small.
Power transformers are classified by purpose: boost (power station 6.3kV / 10.5kV or 10.5kV / 110kV, etc.), liaison (220kV / 110kV or 110kV / 10.5kV between substations), step-down (35kV / 0.4kV for power distribution or 10.5kV / 0.4kV).
Power transformers are classified by number of phases: single-phase, three-phase.
Power transformers are classified according to windings: double windings (each phase is installed on the same core, the primary and secondary windings are separately wound and insulated from each other), three windings (three windings per phase, the primary and secondary windings are separately wound and insulated from each other), Autotransformer (a set of winding taps as primary or secondary output).
Power transformers are classified by insulation medium: oil-immersed transformers (flame-retardant, non-flame-retardant), dry-type transformers, 110kVSF6 gas-insulated transformers.
The core of the power transformer is a core structure.
The three-phase power transformers configured in general communication engineering are double-winding transformers.
Widely used in lighting, machine tool appliances, mechatronics, medical equipment, rectifiers, military, aerospace, etc. Product performance can meet various special requirements of users.