In a power distribution system, distribution transformer, a static electrical appliance that ussed to transform AC voltage and current according to the law of electromagnetic induction to transmit AC electrical energy. Generally, primary side, high voltage to 66kV, the secondary low voltage is 380/220V3kV6kV10kV.
Distribution transformer mainly include oil immersed transformer, cast-resin dry-type transformer.
1.The classification of distribution transformers can be summarized as follows:
By phase number:
1) Single phase transformer: used for single-phase loads and three-phase transformer groups.
2) Three phase transformer: used for raising and lowering voltage in three-phase systems.
2. What are the classifications of distribution transformers? By cooling method:
1) Dry type transformer: It relies on air convection for cooling,
Generally used for small capacity transformers such as local lighting and electronic circuits.
2) Oil immersed transformers: rely on oil as the cooling medium, such as oil immersed self cooling, oil immersed air cooling, oil immersed water cooling, forced oil circulation, etc.
3. What are the classifications of distribution transformers? By its applications:
1) Power transformer: used for voltage rise and drop in transmission and distribution systems.
2) Instrument transformer: such as Voltage transformer, current transformer, measuring instrument and relay protection device.
3) Test transformer: capable of generating high voltage and conducting high voltage tests on electrical equipment. 4) Special transformers: such as furnace transformers, rectifier transformers, adjustment transformers, etc.
4. What are the classifications of distribution transformers? By winding form:
1) Dual winding transformer: used to connect two voltage levels in the power system.
2) Three winding transformer: generally used in power system regional substations, connecting three voltage levels.
3) Autotransformer: used to connect power systems with different voltages. It can also be used as a regular step-up or step-down transformer.
5. What are the classifications of distribution transformers? By iron core form:
1) Core transformer: Used for high-voltage power transformers.
2) Shell type transformer: used for special transformers with high current, such as furnace transformers and welding transformers; Or power transformers for electronic instruments, televisions, radios, etc.
Some high-energy consumption distribution transformers operating in the power grid are no longer in line with industry development trends and are facing the need for technological upgrades and upgrades. In the future, they will gradually be replaced by energy-saving, material saving, environmentally friendly, and low noise distribution transformers. The amorphous alloy transformer combines energy conservation and economy, with a significant feature of low no-load loss, which is only about 20% of a traditional oil immersed distribution transformer;
In 10kV power distribution network, the operation mode of three-phase three wire neutral point non Earthing system is generally adopted. Most of them use the neutral point direct Earthing system operation mode of D/yn11 connection mode, which can realize three-phase four wire power supply. The capacity selection of distribution transformers is also very important for safe operation in the distribution network, including under load operation due to excessive capacity, as well as overload or overcurrent.The situation where the equipment overheats or even burns due to operation. The improper selection of capacity for this device has affected the power system’s power supply and the reliability and stability of electricity.
PowerTel & its associated factory has over 50 years manufacturing experience of different types of distribution transformers, electrical busway and electrical switchgear; Through our package supply of materials and expert design for your power distribution system, it will save your construction costs tremendously while ensuring your power distribution network running safely&smoothly What is more, it can help you save a lot of electricity in the later stage, thereby saving your operating costs; For example, you can try to use an amorphous alloy core distribution transformer in large data centers.
If still any questions, please conact us at : info@powertel-solutions.com