Power Transformer

Why Choose Us

Quality products

We offer high-quality power transmission and transformation equipment that meets international standards and customer specifications.

Cost-effective

Our products are competitively priced. We employ an efficient manufacturing process that reduces production costs and enhances customer value.

Professional team

Our team of engineers, technicians, and sales personnel has over ten years of experience in the manufacturing and supply of power transmission and transformation equipment.

Customer-focused

We prioritize customer satisfaction. We work closely with our customers to understand their requirements and provide tailor-made solutions to meet their needs.

What Is Power Transformer?

A Power Transformer is a type of transformer that is designed to transfer electrical energy between two or more circuits by means of electromagnetic induction. They are used to increase or decrease the voltage of AC power, and are commonly used in power distribution networks to step-up or step-down the voltage of electricity for transmission over long distances. Power transformers are typically large and heavy, and are designed to handle high voltage and current levels. They are essential components in any electrical system, and their reliability and efficiency are critical to the overall performance of the system.

Power Transformers

Ryan’s power transformers are according to ANSI/IEEE,IEC and CSA standards.Ryan relies on advanced technology, a comprehensive quality assurance system, and reliable product structure design and

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66 KV Power Transformer

Specifications:. Primary Voltage Ratings: 69kV 66kV 63kV or others. Secondary Voltage Ratings: 11/10.5/6.6/6.3kV or others. H.V. TAP RANGE: ±8×1.25% or others. CONNECTION TYPE: YNd11 or others. .

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110 KV Power Transformer

Specifications:. Primary Voltage Ratings: 110kV or others. Secondary Voltage Ratings: 11/10.5/6.6/6.3kV or others. H.V. TAP RANGE: ±8×1.25% or others. CONNECTION TYPE: YNd11 or others. TYPE: Power

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Parts of a Power Transformer

There are many configurations and types of power transformer, like unit substation, polemount, medium voltage dry-type, and general purpose low voltage dry-type transformers. Despite different design goals, they all use similar components.

Bushings

Transformer bushings are insulated terminals that allow electricity to pass safely through the tank wall of a transformer without making electrical contact with it. They are the parts of the transformer that connect to the power source (on the high voltage side), and the load (on the low voltage side).

Core & coils

Transformer core and coils, which are at the heart of the transformer, are where the process of induction happens. When electricity flows from the power line to the transformer, the coils dictate how the incoming voltage is transformed. The coils are wound around the core and can be made from either aluminum or copper.

Load break switches

A transformer load break switchis a special rotary switch that allows electrical workers to manually disconnect the transformer from the power grid, de-energizing the core and coils. These switches are called load break switches because they can be used even when the transformer is energized and "under load."

Fuses

Transformer fuses protect the electrical system in case there's a problem with the transformer or in the equipment further down the electrical stream. When exposed to a dangerously high current or excessive heat, a thin wire (called an "element") within the fuse melts. This opens or "breaks" the flow of electricity, disconnecting the transformer from the power grid.

Voltage adjustment taps

A transformer voltage adjustment taps allow you to maintain the correct secondary voltage in case the primary voltage is higher or lower than expected. The tap setting is adjusted by rotating the tap changer. As the tap changer is rotated, small sections of the primary windings are disengaged, which alters the ratio of primary to secondary windings, thereby lowering the primary voltage rating.

Fluid

Transformer oil or fluid is used to cool down transformers when they heat up during use. To maintain low temperatures, a special tank is filled with transformer fluid. This fluid flows through channels or "ducts" between the transformer's windings and serves as an insulator and cooling medium. Only liquid filled transformers contain transformer fluid.

Gauges

Transformer gauges are used to monitor a variety of operating conditions of the transformer, including oil level, temperature, and tank pressure. In larger transformers, the level and types of monitoring can be more sophisticated.

Seven of the Most Common Causes of Power Transformer Failure

Age

The age of the transformer can lead to its failure. However, it's not necessarily the calendar time, but the cumulative operating hours at a high load. A transformer with a continuous 24/7 cycle of high load will age about four times as fast as one with a 5-day 8-hour load cycle.

Major Leakages

Moisture and oxygen can enter a transformer through leaking gaskets causing accelerated ageing of insulation and insulation failure. Leaks can be caused by cracks, tank damage, sealant damage, deformation, weld cracking and many other issues and have the potential to cause environmental harm if not adequately contained.

Inadequate Maintenance

Transformer maintenance is primarily concerned with ensuring the level and condition of the oil and ensuring moisture does not enter the tank. Annual maintenance is the easiest way to be proactive in reducing the likelihood of transformer failures.

Overloading / Overheating

Maintenance allows you to make sure the electrical load settings are appropriate for the specific type of transformer being used. Overloading causes overheating, and eventually, thermal degradation which will reduce the effectiveness of the winding insulation.

Moisture

Moisture in a liquid-filled transformer can cause issues that result in irreversible damage to the insulation. If the transformer tank is not properly sealed, moisture will eventually work its way into the insulating fluid. In the case of free-breathing transformers, it is also possible for moisture to enter a transformer during the natural breathing process if the silica gel is not well maintained.

Left to Disrepair

Transformers that are left to disrepair are often a tell-tale sign that transformer failure could happen. Substations that are overgrown with shrubbery, have the potential to result in damage by trees, obstruction of radiators and other external factors like animals, which could all influence the failure of the transformer.

Lightning Surges

Lightning surges are very capable of destroying the function of a transformer however due to a combination of transformer design and the low lightning density within the UK, this is less common a phenomenon compared to the above factors.

How to Reduce Power Transformer Failure?

It is key to ensure power transformers are designed and manufactured for their intended application. A good construction transformer fit for purpose should not fail prematurely provided an adequate maintenance regime is adopted. Transformers have a long-life expectancy unless something outside the design specification happens. It is vital to perform regular checks on the loading of your transformers. Electrical transformers that operate below the maximum load capacity have a longer lifespan.

Planned maintenance, inspection and testing will significantly reduce the number of transformer failures. Transformer preventive maintenance is very important, immediate preventative action can be taken to avoid any unexpected outages.

Power Transformer Maintenance Checks on a Monthly Basis

Oil level in the oil cap must be checked on a monthly basis so that it doesn't drop below a fixed limit and hence avoid damage due to it.

Keep the breathing holes in the silica gel breather clean to ensure proper breathing action at all times.

If your electrical transformer has oil filling bushing, make sure that the oil is filled up to the correct level.

Annual Power Transformer Maintenance Schedule

1. Make sure that you clean all the bushings of your electrical transformer with only soft cotton cloth annually.

2. Oil condition of OLTC should be carefully examined on an annual basis. For that take an oil sample from drain valve and test it for moisture content (PPM) and dielectric strength (BDV). If the BDV value is found low and the ppm value high, then the oil needs to be replaced.

3. Make sure to clean out the inside of all of the marshalling boxes annually. Check proper functioning of the space and illumination heaters. All of the terminal connections of control and relay wiring need to be tightened at least once a year.

4. All the control switches, alarms and relays along with their circuits, remote tap changer control panel and relay and control panel have to be cleaned with a proper cleaning agent.

5. Examine all the pockets for the winding temperature indicator and oil temperature indicator if they have the necessary level of oil and make sure to top it up if required.

6. The proper function of buchholz and press release device relay need to be checked on a yearly basis.

7. Make sure to measure the resistive value of the earth connection and rizer should be measured annually with a clamp on the earth resistance meter.

Our Factory

Established in 2007，Jiangsu Ryan Electric Co., Ltd is a new high-tech enterprise specialized in manufacturing electric transmission and transformation equipment and has over 20 series products including cast resin dry-type series transformers (Specification：10kV, 20kV, 35kV and 110kV), oil-immersed transformers (Specification：10kV, 20kV, 35kV,66kV and 110kV), pad mounted series transformers (ANSI pad-mounted transformer and IEC prefabricated transformer) and complete sets of high and low voltage electrical switch control equipment (KYN61-40.5,KYN28-12, HXGN, MNS and GGD).

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FAQ

Q: What is a power transformer used for?

A: The purpose of a power transformer is to convert voltage from a high voltage (transmission line) to a low voltage (consumer). The transformer is an electrical device that transfers electric energy by electromagnetic induction.

Q: What is the difference between a power transformer and a normal transformer?

A: Power transformers lose energy as heat due to eddy current losses in their steel laminations and hysteresis losses in the core material. Distribution transformers don't have any iron parts, so they have lower iron losses than power transformers. They also lose energy due to hysteresis losses in the core material.

Q: Swhat is the difference between a generator transformer and a power transformer?

A: Power transformers, produced by power transformer manufacturers and suppliers, are designed for maximum efficiency at full load. Unlike generator transformers, they are not subjected to frequent load variations; hence, their efficiency is optimized for a constant, high load.

Q: Do you need a transformer for electricity?

A: To be usable in everyday applications, the electricity must pass through a transformer which converts the power to a suitable voltage. Many people know what a transformer looks like. Understanding how they work, though, is a different story.

Q: What power transformer do I need?

A: To determine the required transformer VA, multiply the secondary voltage by the required amperes: For example, VA=Volts x Amperes or 28V x 1.2 amperes = 33.6 VA. To determine the maximum transformer current, divide the transformer VA by transformer secondary voltage.

Q: What is the most commonly used transformer?

A: This is the most common type of transformer, widely used in electric power transmission and appliances to convert mains voltage to low voltage to power electronic devices. They are available in power ratings ranging from mW to MW. The insulated laminations minimizes eddy current losses in the iron core.

Q: What type of transformer is commonly used in residential installations?

A: Pole mount transformers, as their name suggests, are transformers mounted on high electrical-grade poles for power distribution. Because they're typically built as single-phase units, they're often found in residential areas where power is stepped down for household use.

Q: What is the most common transformer?

A: Power transformer. The power transformer is the most common type of transformers. Mostly whenever someone refers to a transformer in the industrial zone they are literally talking about a power transformer.

Q: Why are power transformers so expensive?

A: Currently, the global transformer market is observing shortages and subsequent increases in the prices of transformers, mainly due to increased raw material demand, pandemic-related shortages and backlogs, labor constraints, shipping issues, and geopolitical tensions.

Q: Do you need a breaker after a transformer?

A: Transformer's circuit breaker doesn't protect your load. Not all transformers have them, but most have circuit breakers on their secondary. Many people have incorrectly assumed that because this circuit breaker is there, that they don't need any additional protection for their load.

Q: How do I know if my power transformer is bad?

A: Separate the transformer from the input circuit. Test the input with your DMM. If the input power climbs to the expected value, the primary of the transformer is bad. If the input power does not climb to the expected value, then the problem lies not with the transformer, but with the input circuitry.

Q: When must a transformer be used?

A: They are used to 'step up' or 'step down' voltages. So, for example, if you have a 240v power supply and a 110v power tool that you wish to use, a transformer is used to 'step down' the voltage from the 240v socket to the 110v power tool.

Q: What happens when a power transformer fails?

A: A power transformer failure can surely cause some serious damages, on assets and not to mention human health and lives. A fault can also be very dangerous as the transformers contain a large quantity of oil in direct contact with high voltage components. This increases the risk of fire and explosions.

Q: What is the common problem of the transformer?

A: Overloading causes overheating, and eventually, thermal degradation which will reduce the effectiveness of the winding insulation. Moisture – moisture in a liquid-filled transformer can cause issues that result in irreversible damage to the insulation.

Q: Why do power transformers fail?

A: The most common causes of transformer failure include overloading, deterioration, power surges and moisture. Many of these failures occur within the transformer winding insulation and often times can be detected early by conducting rigorous visual, mechanical, and electrical inspections throughout its service life.

Q: What does a transformer look like?

A: An electrical transformer can come in various shapes and sizes, but most commonly it looks like a metal box with wires coming in and out of it. The transformer typically has two coils of wire, an input coil and an output coil, which are wrapped around a magnetic core.

Q: What does a residential electrical transformer look like?

A: The most common types of transformers for residential use are pole mounted and pad mounted transformers. Pole mounted types are the cylindrical containers you see hanging around electrical poles and pad mounted types are the green or gray boxes you see at the back or front of your houses.

Q: How long does it take to install new transformers?

A: If a transformer faults, it is normal to replace it. Attempting to repair would usually be a waste of time. Replacing a transformer might take anything from 15 minutes or less for a small device, up to a year or two or more for a major power transmission transformer to be built and shipped to the job site.

Q: How many years does a transformer last?

A: The typical lifespan of an oil-filled transformer is around 20-30 years, but some high-voltage models that are kept in pristine conditions can last 50 or 60 years! Most of the time, these transformers will outlast the career of the person who ordered or installed them.

Q: What are the physical characteristics of a transformer?

A: 2 coils of wire (not connected to each other) known as the primary and secondary windings, are electrically insulated from each other and wound on a laminated soft iron core. The number of primary Np and secondary NS turns may be varied for attaining the desired electrical power at the load.

As one of the most professional power transformer manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy customized power transformer from our factory.

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