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Electrical Transformer Basics

1. PRODUCT CLASSIFICATION

Classified by cooling method: dry type (self-cooling) transformer, oil-immersed (self-cooling) transformer, fluoride (evaporative cooling) transformer.

Classified by moisture-proof way: open type transformer, potted transformer, sealed transformer.

Classified by core or coil structure: core transformer (insert core, C-core, ferrite core), shell transformer (insert core, C-core, ferrite core), toroidal transformer, metal foil transformer.

Classified by the number of power phases: single-phase transformers, three-phase transformers, multi-phase transformers.

Classification by use: power transformers, voltage regulator transformers, audio transformers, medium frequency transformers, high frequency transformers, pulse transformers.

All kinds of equipment in the power system may have different types of failures in operation, which affect the normal operation of the power system and the normal supply of electricity to the customers. Power system reliability is the measure of the ability of the power system to supply power and electrical energy to customers uninterruptedly according to acceptable quality standards and the required quantity.

The interruption of power supply to customers due to power shortage or accidents in the power system will cause different degrees of losses to industrial and agricultural production and people’s life. Therefore, power supply enterprises have been taking various technical and management measures to improve the reliability of power supply in the planning, design and operation stages of the power system for a long time.

Common Faults And Treatment Of High-Voltage Electrical Equipment

The focus is on the failures and solutions of 10kV circuit breakers (vacuum, sulfur hexafluoride), disconnectors, busbars, transformers, transformers, cables and arresters. Engineering and technical personnel can refer to this article to analyze and process the accidents of high-voltage electrical equipment to ensure the safe operation of electrical equipment, reduce the impact of accidents, prevent problems as much as possible, and eliminate accidents in the bud.

According to the regulations, the voltage above 250 volts is called high voltage. Here we are mainly talking about 10 kV complete sets of equipment: that is electrical switchgear, metering cabinets, capacitor cabinets, etc. It also includes incoming and outgoing wires and transformers.

1. OPERATION OF DRY-TYPE TRANSFORMERS

The safe operation and service life of dry-type transformers largely depend on the safety and reliability of the transformer winding insulation. Winding temperature exceeding the insulation withstand temperature will cause the insulation to age, thereby affecting its service life. It is one of the main reasons that dry-type transformers cannot work normally. Therefore, it is very important to monitor the operating temperature of the transformer and its alarm control.

Dhaka Power Distribution Company formally implemented the overhead cable introduction underground plan.

Overhead power line are very common, but with the use of electricity, the number of overhead cables is gradually increasing. This is a great security hazard in the city area.

According to the Dhaka distribution company, the project will have 290 km of overhead lines to be transferred to the underground.

Composite insulators can effectively use narrow corridors to open voltage and transmit electricity, and are suitable for technical transformation of urban network. They can reduce the height of poles and towers and save a lot of manpower, material resources and financial resources. Due to the high bending strength of composite material insulators, it can prevent the cascading fracture accidents that are prone to porcelain cross arm, and it is an irreplaceable product for porcelain cross arm. In addition, the composite insulator is small in size, light in weight, shockproof and impact resistant, and does not require manual cleaning, which provides a guarantee for safe operation.

A lot of disk-shaped insulators are hung on one end of the high-voltage wire connection tower to increase the creepage distance, usually made of glass, ceramic or composite materials, called electricity insulators.

In order to prevent dust and other pollution from adhering to the surface of the insulator, a path is formed to be broken down by the voltage across the insulator, that is creepage. Therefore, increase the surface distance, that is the creeping distance, and the distance along the insulating surface that is the leakage distance is called the creeping distance. Climbing distance = surface distance / the highest voltage of the system. Depending on the degree of pollution, a crawl distance of 31 mm/kV is generally used in heavily polluted areas.

When the cable lug under take the cable engineering project around small, and medium scale. Power cable terminal connection workable to provide efficient and effective connections inside cable connection projects.

When you are new to the market place and you are looking to get a cable terminal lugs, you more than likely want to find out the huge benefits and characteristics of cable terminal lugs. It’s far better to become well informed than regretting once the purchase. This post will shed more light around the characteristics and great things about cable lugs.

Ultra-high voltage transmission refers to the use of 500 kV-1000 kV voltage levels to transmit electrical energy. If the 220kV transmission indicator is taken as 100%, the relative investment per kilometer of UHV transmission, the relative cost of 100 kilometers per kilowatt-hour of electricity transmission, and the consumption of metal materials will be greatly reduced. In this way, the utilization rate of the line corridor has been significantly improved.

In our daily life, we can often see overhead ultra-high voltage transmission projects. However, have you ever thought about this question: Why can’t all high-voltage cable be buried underground like urban underground cables?

The Difference Between Cold Shrink Termination and Heat Shrink Termination:

1. The difference between the ground wire connection methods: Cold-shrinkable cable accessories use constant force springs. The heat shrinkable cable accessories need to be soldered when using a ground wire.

2. The difference of the shrinkage method: The plastic support strip of the core part of the cold-shrinkable cable accessory shrinks naturally. The heat-shrinkable cable accessory needs to be heated by fire to shrink the low-voltage cable termination.

Electrical Transformer Basics

1. PRODUCT CLASSIFICATION

What is Power System Reliability?

Common Faults And Treatment Of High-Voltage Electrical Equipment

Operation and Maintenance of Dry-Type Transformers

The Power Distribution System Improvement Project In Dhaka Has Finally Started!

Must See! Do You Know The Advantages Of Composite Insulators?

What are the Functions of Electricity Insulators？

Characteristics And Benefits Of Cable Terminal Lug

Why Can’t High-Voltage Cables Be Buried in the Ground?

What are the Advantages of Cold Shrink Cable Termination?