66kv Transformer Fault Analysis For a 66kV transformer secondary winding deformation fault case, we elaborated
Transformer pads are seen around towns and establishments for different purposes.
For instance, a transformer pad is used with underground electric power distribution for lowering the high voltage to serve household and utilities’ low voltage devices.
In this article, you will learn about transformer pads, pad-mounted transformer dimensions, pad-mounted transformer specifications, and residential pad-mounted transformers.
Educating yourself about these subjects can inform you of their proper uses and qualifications.
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Transformer pads are electrical pieces of equipment mounted on a concrete pad for underground power distribution.
This pad-mounted transformer lowers the high voltage power from primary lines to distribute energy-efficient low-voltage devices for houses and utilities.
The transformers have tamper-resistant construction, lockable compartments, tamper-proof bolts, screws, and baffled ventilation openings.
Additionally, these pad-mounted transformers come in single-phase and three-phase classes.
Single-phase pad-mounted transformers are equipped with clamshell cabinets and uninhibited access to connections.
Meanwhile, if you are after a more substantial transformer design, the three-phase transformer can be configured for live and dead front high voltage connections along with radial or loop feed.
Various switching and protection schemes can be integrated into the unit making for a low profile, reliable and multi-functional transformer.
Pad-mounted transformers’ dimensions vary to fit each varying qualification.
These pad-mounted transformers feature embedded lifters, badmouth opening, simple yet strong foundation rug design, and galvanized steel materials for convenience and easy install process.
The transformer’s dimension is measured by the pads’ length, width, and depth in inches.
For instance, a single-phase transformer comes in 40”x45”x4”, and a 3 phase URD transformer comes in 100”x96”x6” dimensions.
Again, pad-mounted transformers are available in different sizes.
The dimension will depend on the size of the equipment and the location for installation.
Pad-mounted transformer specifications available in the market today are widely varied per group.
For instance, a single-phase pad-mounted transformer can have a power rating of 15kVA through 1000kVA.
Windings come in aluminum or copper, and the temperature rise starts from 80℃- 150℃.
Pad-mounted transformer features an electrostatic shield and tamper-resistant enclosures.
These transformers are installed for industrial applications such as schools, hotels, hospitals, and malls.
It is primarily installed near the public for easy underground power distribution, so it is required to be a non-toxic, non-polluting, and securely enclosed package.
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Pad-mounted transformers are usually located in public areas for easy underground power distribution for households.
Usually, they are oil-filled units dedicated to outdoor installations.
The core and coil are enclosed in the tank. Terminals are adjustable on lockable wiring cabinets with high and low voltage compartments.
Carriage bolt-nut assemblies are used for covering the top of the tank.
Furthermore, sidewalls on two ends with doors that open sideways are also present on the wiring cabinet.
Moreover, pad-mounted transformers have self-protecting fuses to protect against secondary faults and power overload.
Correspondingly, residential pad-mounted transformers are used in underground industrial and residential power supply and should comply with safety requirements for the public.
While pad-mounted transformers vary in designs, electrical professionals have the best say on which setup would work on different station designs.
That being said, DAELIM is a brand you can trust and can offer you professional consultation for this matter.
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Single-phase transformer pads are used for underground power distribution in industrial and residential systems such as hotels, shopping centers, hospitals, schools, and universities, corporate buildings, and more.
Additionally, single-phase transformer pads’ enclosed construction allows a safe and reliable station without a need for a protective fence.
Meanwhile, some single-phase transformer pads are designed for radial or loop feed installation and can be set up to meet protective requirements and specified switching.
Moreover, these single-phase transformer pads come in standard and optional features.
Standard features include a bayonet fuse with an isolated link, crowned tank with provisions for lifting, tamper proof hinged door, head door locking bolt, removable sill, parking stand for load break connector, HV bushing wells for dead front connectors, automatic pressure relief device, and is mineral oil-filled.
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Similar to a single-phase transformer, three-phase transformer pads are designed for outdoor installation.
It is used for underground power distribution for multiple households and other industrial establishments.
The three-phase transformer pad highlights standard features such as; 60 Hz operation, 65℃ average winding rise, high voltage door, three-point low voltage door latching, and rigid steel partition.
It also highlights a permanent nameplate, one-inch NPT pipe cap filling provision, ANSI tank ground pads, one-inch drain valve and sampler, automatic pressure relief, and tap changer.
It’s also available for optional features and accessories such as internal expulsion fuses, current-limiting fuses, bayonet fuse holders with and without flapper, internal oil switch for radial or loop, stainless steel tank, and cabinet construction, 50 Hz, type II insulating mineral oil and more.
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Distribution transformer cabinets for services up to 400 amps must be at least 30″ H x 24″ W x 9″ D.
For services requiring more than 400 amps, the current transformer cabinet must be at least 48″ H x 30″ W x 11″ D.
Each new transformer or switchgear must be installed in a new construction project and be equipped with landing pads.
Never use pad-mounted transformers as benches while waiting for the bus or a ride, and instruct kids not to play on or near them.
Don’t plant landscaping around pad-mounted transformers because your co-op’s crews may need to get to them, and roots can interfere with the underground wires.
Also, pad-mounted transformers may be hard to detect from secondary faults on the line since it operates underground.
The lockable doors should remain secure and safe and must be accessed with authorized personnel only.
Furthermore, you are encouraged not to dig near a pad-mounted transformer to avoid hitting the cables installed underneath the ground.
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Responsibility comes from two ends situations; company and consumer.
The owning company holds responsibility for the pad-mounted transformers installed on outdoor stations.
Additionally, the cable inside the conduit is also owned by the company and the meter.
On the other hand, the receiving consumer is held responsible for the conduit.
Furthermore, the meter base or the metal box that houses the meter lies also in your responsibility.
All the wiring inside your home, the fuses, and the service panel are also correspondingly taken with your care.
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Many transformer pads are needed to clamp, fix, and install the coils, windings, and other components of the transformer.
These transformer pads should have good insulation performance and sufficient mechanical strength.
They also need to be flexible and not easily deformed.
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The precast concrete transformer pad’s steel bars are protected from the elements and are unaffected by water, air and other contact. It serves two purposes: it protects the concrete transformer pad’s steel bars from the outside world. The technical feature is to adjust the distance between steel bars and formwork so that it conforms to the thickness of the protective coating specified in the national building code.
Concrete transformer pads are a prefabricated high-strength cement mortar blocks or concrete blocks with wire ties.
The protective layer pad can be made from concrete pads, such as concrete mortar, concrete and plastic. These concrete pads are used to protect the concrete slab’s bottom reinforcement, cast-in place slab’s surface reinforcement protection layer and cast-in slab lower reinforcement. There are three parts to the protective layer: the protective layer at bottom of beam, the side and beam of the column, and the protective panel of the wall panel.
These parts are made with the same thickness as the steel protective layer. This allows reinforced concrete components to be used outside. The steel bars won’t be affected by corrosion beyond what is required. Concrete transformer pads can also be used outdoors.
The function of concrete is actually the same. Concrete’s steel bars are protected from the outside and aren’t affected by water or air.
Concrete pads can be prefabricated with high-strength cement mortar bricks or concrete blocks with wire-ties.
The protective layer pad can be made from concrete pads, such as concrete mortar, concrete and plastic. These concrete pads are used to protect the concrete slab’s bottom reinforcement, cast-in place slab’s surface reinforcement protection layer and cast-in slab’s lower reinforcement. There are three parts to the protective layer: the protective layer at bottom of beam, the side and beam of the column, and the protective panel of the wall panel.
These parts are the same thickness as the steel protection layer. This allows reinforced concrete components to be used outside. The steel bars won’t be affected by corrosion beyond what is required. Concrete structures can also be durable!
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The bamboo material used to make the Bamboo Transformer pad is bamboo.
The manufacturing process involves the following: First, the bamboo material is cut into strips. Next, the water in the pool is heated to make the Bamboo chips. After drying, the Bamboo chips are removed from the drying area and dried to less than 15% moisture. To dry the bamboo chips to less than 7% moisture, enter the drying room. Next, plan the bamboo and coat it with adhesive. Finally, stack the pieces and place them in a steamer hot press for about half an hour.
The transformer platen’s final product is cut machining.
The transformer’s size and the area of the construction site will determine the size of your transformer pad. Once the transformer has been sized, mechanical excavation and manual cleaning are used.
These are the general dimensions of the transformer pad:
Length * Width * Thickness
40” *40” *6″
40” *53” *4″
42″ *42” *6″
44” *46” *6″
42” *52” *6″
44” *52” *6″
44” *60” *6″
48” *48” *6″
48” *60” *6″
58” *58” *6″
60” *72” *6″
64” *80” *6″
72” *72” *6″
72” *96” *6″
Pad-mounted transformers are a great innovation that has been serving industrial structures and institutions with energy-efficient supplies for a long time now.
While transformer pads vary in designs and several factors, electrical professionals can help gauge the right pad-mounted transformer for you.
The dimensions will depend on the size of the equipment and the location for installation.
Pad-mounted transformers are usually located in public areas for easy underground power supply for households.
Again, transformer pads feature embedded lifters, simple yet strong foundation rug design, and galvanized steel materials for convenience and easy install process.
It is worth noting that though pad-mounted transformers are enclosed packages and may look safe and secure, you should always keep a distance from them.
Ordinary people and authorized personnel can practice these safety measures by keeping a distance of at least 10-feet of clearance at the opening and 4-feet at the back and sides of the base pad.
DAELIM can be your trusted partner in keeping safe electrical equipment while providing you with satisfactory service and customizable abilities to meet your needs.
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