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Why Transformer?

The modern world requires a continuous and safe flow of electricity into residential or commercial establishments, whether it is to light our homes or keep the refrigerator running.
Power transformers, in conjunction with distribution transformers, allow electricity to be transmitted to any location. Power transformers receive electricity at extremely high voltages, which are then stepped down by the transformer to lower voltage levels that can be distributed to individual residential or commercial units via distribution transformers. Lower voltage (or higher current) levels are adequate for the operation of the electrical appliances we use.
Power transformers are also used in power generating stations, which generate electricity for a large city. Transformers assist in boosting generated power to ensure that the entire city receives power. Power generated in power plants would be insufficient to power the entire city if power transformers were not used.
Modern appliances have different voltage requirements depending on their use, which are met by power transformers. Furthermore, power transformers disconnect the electrical device from the main power supply, protecting it from damage or risk.

Why Grant Transformers?

Grant Transformer Company has acquired all of the characteristics you would expect from a world-class transformer solution specialist, but what truly distinguishes us is our dedication to creating solutions that are smart for life.
Our transformer products are designed and manufactured to meet your specific requirements, with smart innovation delivering quality solutions that last. As a result, our products are known for lasting a long time with little downtime and low operating costs.
This is our promise to you: we believe the built smart for life philosophy represents superior value. Our commitment is made possible by an exceptional team of experts known as the transformers.
Our employees take pride in being responsive and meeting the needs of our customers. Our team provides the expertise, care, and commitment to meet your specific requirements, from small distribution transformers and compact MV substations to large power transformers and associated solutions.
Grant understands that each customer's needs are unique, which is why we take pride in being adaptable in our approach. This section of our website describes the services that you would expect from a world-class transformer solutions provider. We offer our customers the confidence of working with an organisation that has proven itself over 20 years of excellence with many satisfied customers all over the world, from a comprehensive range of products, services, and support to state-of-the-art manufacturing facilities and compliance.

Why do Transformers hum?

The familiar humming noise that transformers emit is one of the most common symptoms of excessive transformer noise. However, determining whether the amount of noise is excessive is more difficult than it appears.
Why? Because the flow of alternating current through the transformer has a magnetic effect on the iron core of these devices, all transformers "hum" to some extent.
A certain amount of humming is normal, but there are ways to control it if the transformer's performance measurements for current, voltage, or both are outside the specified parameters. This may also be necessary in certain workplace situations to keep employees more effective and productive.
Transformer noise can be caused by a variety of factors. The Magnetostriction Effect is the most important. When current flows through the transformer's coils, it creates a magnetic field. The magnetic field then alters the dimensions of the iron core of the transformer. The alternating current causes the core to expand and contract, resulting in a humming sound.
As the transformer ages, the layers within the core of the transformer begin to separate and break apart. The vibrations become louder as a result.

How Do Grant Transformers Reduce Noise Levels?

Choose a Low-Traffic Installation Location

The first step in reducing transformer noise is to locate it in a low-traffic area. The term "traffic" in this context refers to both the movement of people and the presence of other electrical devices. Both can cause excessive humming, but other devices are far more likely to be to blame, especially in office spaces with computers and other electronics.

Avoid intersections, stairwells, and corridors

The following step is about spacing. Putting transformers in tight spaces, in particular, amplifies noise and humming while also reflecting back any interference that may be present. To counteract this, avoid placing transformers in corners, corridors, or stairwells whenever possible.

Place the unit on a firm surface

Also, make sure that your transformers are mounted on a solid surface. Plywood surfaces, as well as thin walls used as curtains in interior structures, amplify noise. Transformers perform best when mounted on heavy, dense surfaces such as concrete floors or walls, so these should be your prefered surfaces whenever possible.

Place the unit on a firm surface

Also, make sure that your transformers are mounted on a solid surface. Plywood surfaces, as well as thin walls used as curtains in interior structures, amplify noise. Transformers perform best when mounted on heavy, dense surfaces such as concrete floors or walls, so these should be your prefered surfaces whenever possible.

Acoustical dampening material should be used

Furthermore, there are several preventative measures you can take to reduce the effects of humming on those who work in areas where transformers are present.
One option is to use acoustic dampening material to help keep the noise from spreading. Acoustic tile is one of the best dampening materials available, and fibreglass and kimsul are two other solid examples.
Another option is to employ materials such as oil barriers or cushion padding. These will not eliminate the noise, but they will make it easier for people working in transformer areas to deal with the annoying hum.
Finally, when installing and configuring transformers, always follow the manufacturer's instructions.
When it comes to issues like the use of dampeners, screws, and bolts, these specs tend to be very specific, and paying attention to the details contained in the specs is critical when it comes to getting the most out of your transformers.

How Do Grant Transformers Test Noise Levels?

CPRI's Noise Level Measurement Facility 

The pressure generated by a noise source is commonly measured in decibels (dB) by comparing it to some standard level. There are two methods for measuring noise levels: sound pressure measurement and sound intensity measurement. The sound pressure method is used to measure noise levels in the CPRI. IEC: 60076-10 specifies the test methods and acceptable test environment conditions. The techniques are also applicable to transformers, reactors, and their cooling devices. Sound pressure level is a scalar quantity that can be measured with simple instruments. The method measures directional sound and measures sound intensity as a vector quantity. As a result, it is less affected by background noise. As a result, in the presence of background noise, the sound intensity method can provide more accurate measurements. 

Sound intensity measurements, on the other hand, necessitate greater skill and more sophisticated instrumentation. The frequency spectrum can be used to learn about the location and characteristics of noise sources. Aside from design challenges, measuring low noise is a difficult problem. The ambient noise conditions in the test area limit the minimum level of noise that can be measured. To protect the instruments in the test setup and transformer from the high ambient noise, special inclosures may be required. As shown in Figure 3, noise level measurements can also be taken in large rooms or open areas where background noise interference is minimal. When conditions are close to free-field, essentially unaffected by reflections from nearby objects and the environment boundaries, as is occasionally achieved for outdoor measurements, the value for 'K' tends to zero and no environmental correction is required.

Is Certification Available for Grant Transformers?

The Australian Standards Association has certified all Grant transformers. They have been designed and tested to meet the most recent specifications.


Does Grant Transformers provide Zig Zag grounding transformers?

Yes. This system can be used to ground or create a fourth wire from a three phase 3 wire. (neutral)


What is the power coating paint system used by Grant Transformers?

Grant employs a powder coating painting technique. Powder coating provides a long-lasting, cost-effective, and durable finish with a variety of colour options for nearly any metal. Furthermore, when compared to other types of finishes, a powder coated surface will be more resistant to scratches, chipping, wear, and fading.
Grant's standard paint system employs TGIC Polyester powder coatings, which are designed for exterior exposure and provide excellent weather resistance from a single coat finish, as well as good chemical resistance to splash/spillage, fumes, and immersion in neutral, fresh, and salt water. ANSI 61, a light grey colour, is the standard colour used on all liquid-filled and dry-type transformers. There are two lines available: one for ANSI 61 and one for ANSI 49. In addition to the colours listed above, the factory can supply any RAL colour or if a sample paint chip of the colour to match is provided.
Optional Premium System (Provided when specified on order):  
Grant can provide an optional premium paint system for added protection with increased impact resistance and additional corrosion protection. This system consists of an epoxy coating base coat, followed by an additional coat of a high build polyurethane coating, as described above ( 5 MIL or 125 Microns). This polyurethane coating has excellent colour, UV protection, and gloss retention over long periods of service. The premium paint system with multiple coats produces a high performance, corrosion-resistant system with excellent appearance and durability. 


What is the difference between VA and Watts?

You'll notice that specifications for uninterruptible power systems almost never mention watts (W), but rather volt-amperes (VA). Watts represent "real power," whereas volt-amperes represent "apparent power." Both are simply the product of voltage (V) and amperage (A) (A). As an example, a device drawing 3 amps at 120 volts is rated at 360 watts or 360 volt-amperes.
A DC circuit's resistance is pure resistance, which is limited to the conductor's impedance (measured in ohms) (s). Thus, watts are a good measure of "real power," and if you have three 120 VDC devices calculated to work at 200, 400, and 600 watts, respectively, you can simply add them linearly to determine how much power the circuit requires, which is 1200 watts (1.2 KW).
In contrast, AC circuits have inductive resistance, which is caused primarily by the build-up and collapse of current with each 60 Hz excursion of the sinusoidal wave. This means that, depending on their respective amperage requirements, three 120 VAC servers rated at 200 VA, 400 VA, and 600 VA will not necessarily add up to 1200 VA (1.2 KVA). To summarise, "volt amps" is a warning to proceed with caution.

Can a single-phase transformer be used on a three-phase load?

We're all pretty sure that transformers are either single phase or three phase. Voltage transformers, on the other hand, can be built to connect to two-phase, six-phase, and even elaborate combinations up to 24-phases for some DC rectification transformers. We can use three single-phase transformers on a three-phase supply if we connect their primary windings to each other and their secondary windings to each other in a fixed configuration (either delta or wye).

To make the transformer connections compatible with three-phase supplies, three single-phase transformers must be connected in a specific way to form one Three Phase Transformer.

A three phase transformer, also known as a 3 transformer, can be built by connecting three single-phase transformers to form a three phase transformer bank, or by using one pre-assembled and balanced three phase transformer consisting of three windings mounted onto one laminated core.

Because the copper and iron core are used more effectively, a single three phase transformer will be smaller, cheaper, and lighter than three individual single phase transformers connected together for the same kVA rating. The methods for connecting the primary and secondary windings are the same whether a single three-phase transformer or three separate single-phase transformers are used.

How does a transformer work?

As a result, the operation of a TF is based on the mutual electromagnetic induction of two circuits connected by a common magnetic link. The mutual induction that occurs between these circuits is what aids in the transfer of energy from one point to another.

The main winding is the one that is connected to an electrical source and is the source of the initial magnetic flux.
Both coils are separated from one another. The initial electric flux is induced in the main winding, through which the magnetic core passes and is connected to the secondary one in terms of low reluctance; this contributes to the maximum connection or link.

What the core actually does is act as a bridge, retransmitting the electrical flow to the secondary winding in order to complete the current flow.

It is also worth noting that in some types of TF, the secondary winding can achieve an impulse when both windings are wound on the same core, allowing the generated magnetic field to produce movement.

Technically, all types of transformers have a magnetic core assembled by the accumulation of steel sheets, with a minimum air gap required to ensure the magnetic path's continuity.

A TF delivers alternating current energy from one circuit to another using its primary winding, which changes the voltage while preserving the frequency. Primary winding is what generates an alternating flux in the core.