Category: Transformer Bushings Manufacturer in India 

Transformer bushing designs are made specifically to suit the needs of the electrical transformers. As per the regulations set by the Institute of Electrical and Electronics Engineers Standards, a transformer bushing is made keeping in mind the requirements and limitations. Most transformer bushing manufacturers in India try to follow the regulations while building the same.

Transformer bushing is a kind of insulating component which acts as a passage for carrying the current through the transformer. The conductor is present either at the bottom of the transformer or at the centre of the same. There are different types of bushings available with specific sets of properties designed to suit the needs of the transformers. Read on to know more about the bushing types and designs.

Types of Transformer Bushings

Transformer bushings are generally of three types: solid, ceramic, oil impregnated paper, silicone rubber insulator, and resin-impregnated paper. It would help if you cleaned, visually inspected and also inspected the temperature of the bushing to assure that the bushing is in working condition. Make sure that you clean off the dust from the bushings before you test the transformer.

To know more about the types of bushings, read on.

Solid Ceramic Bushings

These are made of the simplest designs with the central conductor, surrounded by the ceramic insulator. If the power demand is high, this type of bushing is a favourable option.

OIP Bushings

You’ll find the use of OIP bushings in the power transformers. They can be easily used because they are partially discharging free and durable. However, there can be risks associated with using OIP bushing. OIP bushings can easily fail, which would hamper the transformer’s working.

RIP Bushings

These bushings are made by combining a small amount of mineral oil along with the resin-impregnated paper. These are commonly used in high-voltage applications and can be easily used in ceramic and composite forms. The composite form of RIP bushing has gained much popularity over time.

SRI Bushings

If you’re not comfortable using ceramic bushings, then the option of SRI bushings is highly favourable for modern-day transformers. Using SRIs is a great option as it does not cause any damage or breakdown. However, SRIs cannot match the voltage changes of all types of transformers.

Reliance Potteries is a reliable manufacturer of transformer bushings in India. We use the latest technology and premium raw materials, and advanced testing methods to manufacture the same. Check our website for further details.

 

 

The transformer bushing is equipment utilised to test whether the transformers are operating efficiently and correctly. While the most common type of testing is oil testing, you can implement the electrical testing method to get precise results. You can purchase premium quality transformer bushings from the reputable Transformer Bushings Manufacturer in India for product assurance.

 

What is a Transformer Bushing? 

 

The transformer Bushing is a kind of insulating structure that forms the passage for current-carrying, energised conductors through the grounded tank of the transformer. Either the conductor is built into the bushing, like a bottom centred one, or drawing in a separate conductor through the centre. This can be a draw lead or draw rod bushing.  

 

Types of Transformer Bushings 

 

Transformer Bushings usually have two principles, a solid/bulk type and capacitance graded bushing. The latter is also known as the condenser type.  

The manufacturers make solid bulk bushings using porcelain or epoxy insulators. You can mainly utilise this for low voltage windings of the transformer. On the other hand, capacitance graded bushings are designed for high voltage ratings and high voltage windings.  

 

The failure of transformer bushings is considered a leading cause of transformer failure. Hence, the transformer asset owners must consider its quality. There is typical bushing failure because of moisture ingress, lightning strikes, misapplications, corrosive sulphur, broken connections, etc. 

 

Why Should You Test the Transformer? 

 

Routine electrical testing is mandatory, and you should perform it every 3-5 years for the utility companies. For electrical testing, you need to de-energise the unit and isolate it to perform complicated processes. There are several reasons why performing electrical testing of the transformer is essential.  

 

1. Acceptance Testing.
2. Bringing the Transformer Out of Storage  
3. After the Transformer Trips Offline 
4. Verification of the Oil Test that is unacceptable 

 

Transformer Bushings Maintenance 

 

• Cleaning  

 

Before testing, you should clean them of the dust, impurities and dirt particles. You can administer a simple bushing cleaning method – elbow grease and soft rags. If the bushings are dirty, cleaning with solvents is also helpful. Other methods are pressure water washing with CO2 and more. 

 

• Visual Inspection  

 

Check the bushings for cracks and other damages. If the damage is severe, the current leakage can become excessive, showing carbon trackings on the surface. Flashovers can also occur if you do not clean these bushings periodically. 

 

  

• Thermographic inspection    

 

You can also inspect high voltage bushings with infrared cameras to check loose connections.  

 

Reliance Potteries is a reputable manufacturer of high voltage transformer bushings and other electrical equipment. They design test equipment with superior functionality in compliance with industry-specific standards.