Pad-mounted transformers are widely used in residential communities, hospitals, docks and other places that require centralized power supply.
What makes it so popular?
Safety, high cost performance, energy saving and high efficiency have become the name for it.
More and more buyers need to buy it?
But, What are Pad-mounted transformers?
What inside a pad-mounted transformer？
What are the pad-mounted transformer health risks？
How to choose a good Pad-mounted Manufacturer?
We have many questions about the pad-mounted transformer, but we can not get them from the Sales Company’s product page.
But for purchasers or engineers, we need to know more about pad-mounted transformers in order to better buy and use it.
In this post, I will disassemble the pad-mounted transformer for you. I will also share some tips on how to choose a pad-mounted transformer.
The pad-mounted transformer is an important power supply equipment in the cabled distribution network.
The pad-mounted transformer adopts a double-fuse full-range protection method. This greatly reduces the loss.
There are mainly two types: Single-phase Pad-mounted transformer and Three-phase Pad-mounted transformer.
The pad-mounted transformer has the performance advantages of a lightweight, low noise, small size, and low loss.
An excellent pad-mounted transformer is mainly composed of high-voltage control, protection, substation, and power distribution equipment.
The pad-mounted transformer adopts the principle of parallel operation of the high-voltage side bus.
Its low-voltage side bus is mainly responsible for circuit breaker transfer.
It has good safety performance.
Pad-mounted transformers are widely used in large-scale business centers, railway stations, mines, and other large-scale event venues.
Opening the valve (Fig3) will drain the oil in the tank.
It will release the pressure in the fuel tank.
Daelim’s pad-mounted transformer contains two types of valves.
One is filling the plug with the Schrader valve (Fig 4A).
The other is the filling valve with the Schrader valve (Fig. 4B).
It is used for the introduction of nitrogen and dielectric fluid.
Daelim uses a variety of different brands and models of level gauges according to the application.
Daelim can be equipped with standard instruments as required. If the environment is complex, more complex models can also be provided. It can facilitate external monitoring.
Under normal operation, the liquid level may change according to temperature and pressure.
Daelim pad-mounted transformer provides a thermometer (Fig 7).
Its function is to observe the temperature of the top dielectric fluid in the fuel tank.
It includes two hands, one white and one red.
The white pointer indicates the current oil temperature of the pad-mounted transformer.
The red pointer indicates the maximum reset value of the dielectric fluid temperature.
The long thermocouple is its main component.
In order to facilitate the replacement of the gauge. The thermocouple and the dielectric fluid are isolated from each other.
There are one or two SPDT alarm points on the thermometer.
It has the function of remote monitoring.
These alarms for electric shock can be set according to factory requirements.
Unscrew the small hexagonal fixing screw in the center of the meter.
It can help you adjust the contact.
Set the contacts to the required temperature. You can complete the operation.
The pressure gauge (Fig 8) indicates whether the headspace pressure in the tank is positive, negative, or neutral.
The pressure change factors in the fuel tank:
Pad-Mounted transformers usually have positive or negative voltage.
Continuous low temperature will cause continuous negative pressure. It is normal.
However, if the temperature rises, the meter reading is still zero.
This means that there is a leak.
The leakage of equipment needs to be checked.
Daelim can equip the pressure gauge with SPDT alarm contacts according to your requirements.
It can remote monitoring of positive and negative pressures.
The pressure/vacuum gauge can also be equipped with a decompression or regulator.
When used in combination with an external nitrogen supply, the tank can maintain a positive pressure (2.5 to 3.0 PSI).
The valve of the regulator can be used to collect gas samples.
Daelim can equip pad-mounted transformers with different types and levels of CT according to user requirements.
The following are three types of CT:
An externally operated no-load tap changer (NLTC) (Fig 14 A and B) is suitable for all kinds of pad-mounted transformers.
The rated voltage of the tap under normal conditions is -5%~5%.
This means that the output voltage of the Pad-mounted transformer is adjusted in increments of 2.5%.
The tap switch is designed as an operable handle.
It is available in two styles.
Each of which requires a slightly different method to change tap settings.
Bay-O-Net fuse replacement instruction (Fig. 20 B):
The connections must be made in accordance with the diagrams and information provided on the nameplate.
There are two typical high voltage connections:
a.Live front transformer connections
External/internal clamping porcelain bushings are usually used for high-voltage connections to pad-mounted transformers.
Daelim was provided with eye bolts or spade terminals suitable for copper and aluminum conductors.
b.Dead front transformer connections
Cased wells or one-piece bushings are usually used for high-voltage connections to pad-mounted transformers
It is suitable for elbow connections.
Equipped with spade terminals with 2 to 20 holes.
It can take a low voltage connection to pad-mounted transformers.
Before the work starts, a full inspection of the pad-mounted transformer is required.
Confirm that all its accessories are normal. There was no damage.
The following are the inspection steps:
Pad mounted transformer needs to be placed in an open place. This will facilitate a comprehensive inspection.
Outdoor Installations Pad-mounted Transformer
The correct placement of the pad-mounted transformer should be far away from the structure that restricts the airflow around the equipment.
Indoor Installations Pad-mounted Transformer
Special precautions should be taken.
The venue must be ventilated.
Confirm that the vent is open. This is to prevent accidental overheating of the transformer.
If good natural ventilation is not possible, a fan can be used to make the transformer out of the ventilated environment.
The pad-mounted transformer must be prevented from being on a level ground.
The ground must be concrete.
The location must prevent the pad-mounted transformer from tilting more than 2 degrees from the horizontal.
The pad-mounted transformer oil tank and the cabinet base provide provisions for installing splints to secure the transformer to the mat.
There must be no gap between the gasket and the cabinet.
Add permanent mortar to seal the gaps.
Routine inspections of the outside of the equipment should be carried out regularly.
Remove any dirt from the base and cabinet area to prevent premature rust and deterioration.
Check whether the surface paint of the pad-mounted transformer is complete.
If there is paint peeling on the surface, you can take a specific picture and tell Daelim.
Daelim staff will inform you of the type of paint used on specific parts.
This will help you improve the paint touch-up efficiency.
Regularly confirm whether each instrument is working properly.
There are five main parameters for a Three-phase Pad-mounted transformer:
12.DRAIN VALVE WITH SAMPLER
15.HAND HOLE&SECURITY COVER
Dimension (W*D*H): 610*740*840mm;
Oil Weight: 45 kg;
Total Weight: 294 kg;
Dimension (W*D*H): 610*740*840mm;
Oil Weight: 68 kg;
Total Weight: 362 kg;
Dimension (W*D*H): 610*760*840mm;
Oil Weight: 75 kg;
Total Weight: 476 kg;
Dimension (W*D*H): 610*810*840mm;
Oil Weight: 93 kg;
Total Weight: 553 kg;
Dimension (W*D*H): 610*860*840mm;
Oil Weight: 132 kg;
Total Weight: 672 kg;
Dimension (W*D*H): 740*940*910mm;
Oil Weight: 141 kg;
Total Weight: 742 kg;
Dimension (W*D*H): 760*1190*910mm;
Oil Weight: 207 kg;
Total Weight: 952 kg;
Dimension (W*D*H): 1390*910*1430mm;
Oil Weight: 120 kg;
Total Weight: 645 kg;
Dimension (W*D*H): 1420*920*1430mm;
Oil Weight: 138 kg;
Total Weight: 729 kg;
Dimension (W*D*H): 1510*980*1530mm;
Oil Weight: 201 kg;
Total Weight: 989 kg;
Dimension (W*D*H): 1600*1000*1660mm;
Oil Weight: 230 kg;
Total Weight: 1195 kg;
Dimension (W*D*H): 1660*1080*1680mm;
Oil Weight: 260 kg;
Total Weight: 1415 kg;
Dimension (W*D*H): 1810*1160*1790mm;
Oil Weight: 325 kg;
Total Weight: 1905 kg;
Dimension (W*D*H): 2030*1300*2030mm;
Oil Weight: 535 kg;
Total Weight: 2755 kg;
Dimension (W*D*H): 1651*1549*1854mm;
Oil Weight: 650 kg;
Total Weight: 3235 kg;
Dimension (W*D*H): 2210*1470*2150mm;
Oil Weight: 748 kg;
Total Weight: 5835 kg;
Dimension (W*D*H): 2380*1600*2220mm;
Oil Weight: 950 kg;
Total Weight: 6430 kg;
Dimension (W*D*H): 2480*1650*2330mm;
Oil Weight: 1020 kg;
Total Weight: 8865 kg;
The following are all health risks that may be involved in all pad-mounted transformers.
It includes the health risk caused by irregular operations during maintenance.
Health risk caused by wrong placement location selection.
With the expansion of market demand, more and more pad-mounted transformer manufacturers appear on the market.
But how to choose a suitable pad-mounted transformer manufacturer?
Below, we consider it in Four directions.
First confirm what type of pad-mounted transformer you need to buy?
Is it a three-phase pad-mounted transformer?
Or is it a single-phase pad-mounted transformer?
Confirm the Rated Power (KVA) of the pad-mounted transformer that you need to purchase.
Daelim has an excellent team of designers.
Whether it is a three-phase pad-mounted transformer or a single-phase pad-mounted transformer.
Daelim has more than 15 years of design and production experience.
Daelim can design and produce a pad-mounted transformer suitable for you according to your needs.
There are many traders pretending to be factories.
So how do you recognize whether the counterparty is a trader or a factory?
You can ask the other party to provide a business license.
And through the business license to check whether the other party has a factory.
Because the regulations of the power system of each country are different.
It is necessary to confirm whether the other party’s production has international certification.
Common certifications for pad-mounted transformers are: SGS, CNAS, CE, SA, CESI.
Daelim as a good pad-mounted manufacturer has all the above certifications.
The following are the certification and patent certificates obtained by Daelim.
Whether a pad-mounted tranformer manufacturer has export experience is extremely important for your purchase.
It represents whether you can purchase a pad-mounted tranformer that meets the requirements of the local market.
It represents whether your purchase can proceed smoothly.
It represents whether your follow-up service can be complete and orderly.
Daelim has 15 years of experience in the production and export of pad-mounted tranformers.
Daelim’s products are exported to more than 30 countries and regions.
And can provide the completed installation and commissioning and other sales back-end services.
Below is a photo of Daelim and their business partners.
Due to the impact of the epidemic, you cannot go to the factory for on-site inspections.
But you can view it through video and other methods.
You need to know whether this pad-mounted transformer manufacturer has complete experimental equipment.
Does the pad-mounted transformer have a large workshop?
Does the pad-mounted transformer have a strong R&D team?
Daelim has complete production and testing equipment.
It includes a transformer Drying oven, a test console, Lighting impulse equipment, epoxy vacuum pouring machines, silicon steel sheet shearing automatic line…
Below are photos of these devices.
When you need to find more than just existing transformers, Daelim’s Transformer Service Center can help you design and produce distribution transformers that meet your unique needs.
We have our own factory and a professional team of engineers, which can design and modify application requirements that meet all your conditions.
ELECTRIC, WITH AN ENGE-- DAELIM BELEFIC