The Ultimate Loop Feed Pad Mounted Transformer Guide

Distrubution transformer manufacturer

Pad mounted transformer is mainly divided into Loop Feed Pad Mounted Transformer and Radial Feed Padmounted Transformer. Mainly used in schools, commercial centers, factories, docks and other areas with high underground power distribution loads.

Daelim as a transformer manufacturer with rich experience. The transformers produced by Daelim are designed and tested in strict accordance with IEEE, CSA, ANSI, DOE, IEEE standards. If you choose Daelim, you will receive a full test report to help you understand the entire process of designing and manufacturing your transformer.

Pad-mounted Transformer

75~2500kva Three phase Loop Feed & Radial Feed pad mounted transformer

Dry-type Transformer

Type:Cast resin; Rated Capacity: Up to 25MVA; Rated Voltage: Up to 36KV;

Single Phase Pad Transformer

Reated power: 15~167kva; High Voltage: 7200 ~ 34500 v

Pole Transformer

Type CSP type Single Phase Frequency: 50/60Hz; Rated Power: 5~167kva

Table of Contents

What is Loop Feed Pad Mounted Transformer?

Daelim transformer manufacturer

Loop Feed Pad Mounted Transformer mainly refers to a high-voltage switchgear installed in a steel plate metal cabinet, and it is made into a spaced ring network power supply unit, mainly with fuses and load switches as important components. Small size, relatively simple structure, relatively low price and relatively safe power supply effect.

In essence, Loop Feed Pad Mounted Transformer has been used for the designation of load switch cabinets. Whether it is applied to ring network power supply or not, it can be called Loop Feed Pad Transformer as long as the purpose of loop closing operation and load cutting can be achieved.

Therefore, its most important feature is that it can realize power supply through Loop Feed, which belongs to the category of a switch and is currently widely used in various ring network power supply systems.

Among them, the structure of the load switch is relatively simple, and there will be no large cost expenditure during installation. Corresponding SF6 circuit breakers and vacuum circuit breakers can be added to the load switch, and the purpose of arc extinguishing can be achieved by means of air pressure.

In the normal operation process, the main function of the Loop Feed Padmounted Transformer is to shunt or combine the load current, and at the same time, it can also break the no-load current in the transformer and the short-circuit current in different circuits. In this way It can effectively protect the entire power supply system.

According to the air box structure in the Loop Feed Pad Mounted Transformer, it can be divided into a unit type Loop Feed Padmount Transformer and a common box type Loop Feed Padmounted Transformer;

According to the overall structural characteristics, it can be divided into YB-PRE Compact Substation and Loop Feed Padmounted Transformer;

According to the insulating material, it can be divided into air-insulated Loop Feed Pad Mounted Transformer, solid-insulated Loop Feed Pad Transformer and SF6 Loop Feed Pad Mounted Transformer;

According to the application environment, it can be divided into outdoor Loop Feed Pad Mounted Transformer and indoor Loop Feed Pad Mounted Transformer.

What is Loop Feed Pad Mounted Transformer?

Loop Feed Pad Mounted Transformer mainly refers to a high-voltage switchgear installed in a steel plate metal cabinet, and it is made into a spaced ring network power supply unit, mainly with fuses and load switches as important components. Small size, relatively simple structure, relatively low price and relatively safe power supply effect.

In essence, Loop Feed Pad Mounted Transformer has been used for the designation of load switch cabinets. Whether it is applied to ring network power supply or not, it can be called Loop Feed Pad Mounted Transformer as long as the purpose of loop closing operation and load cutting can be achieved.

Therefore, its most important feature is that it can realize power supply through Loop Feed, which belongs to the category of a switch and is currently widely used in various ring network power supply systems.

Among them, the structure of the load switch is relatively simple, and there will be no large cost expenditure during installation. Corresponding SF6 circuit breakers and vacuum circuit breakers can be added to the load switch, and the purpose of arc extinguishing can be achieved by means of air pressure.

In the normal operation process, the main function of the Loop Feed Padmounted Transformer is to shunt or combine the load current, and at the same time, it can also break the no-load current in the transformer and the short-circuit current in different circuits. In this way It can effectively protect the entire power supply system.

According to the air box structure in the Loop Feed Transformer, it can be divided into a unit type Loop Feed Padmount Transformer and a common box type Loop Feed Padmounted Transformer;

According to the overall structural characteristics, it can be divided into YB-PRE Compact Substation and Loop Feed Padmounted Transformer;

According to the insulating material, it can be divided into air-insulated Loop Feed Pad Mounted Transformer, solid-insulated Loop Feed Pad Mounted Transformer and SF6 Loop Feed Pad Mounted Transformer;

According to the application environment, it can be divided into outdoor Loop Feed Pad Mounted Transformer and indoor Loop Feed Pad Mounted Transformer.

What is the advantage of a Loop Feed Pad Mounted Transformer?

Daelim transformer manufacturer

The structure of Loop Feed Pad Mounted Transformer is too complicated. When it operates normally, it mainly realizes the purpose of power distribution through closed-loop and open-loop methods.

The closed-loop distribution mode is relatively more stable and safe. It has been widely used in urban power distribution systems, but there are still some problems, mainly because the parameters of the system relay protection equipment cannot be accurately calculated. The open-loop system has a smaller capacity, but it can calculate the relay protection parameters more accurately.

In the current distribution network construction, most areas have adopted differentiated wiring methods, which makes it more difficult for relevant staff to repair and deal with faults.

The Loop Feed Pad Transformer has obvious advantages, mainly because traditional divergent distribution lines and trunk-type distribution lines have a wide range of applications.

However, with the continuous changes of the times, the distribution lines in these two modes cannot give full play to their own service functions, which leads to the emergence of the Loop Feed system, which can provide internal circuit channels. Carry out all-round control, so that the intelligent technology can be deepened, and the distribution network lines are also more automated.

And this system also has strong adaptability, only takes up a small space, and the investment cost is relatively small.

The thermal function of the Loop Feed Transformer is relatively stable. When the fuse in the load switch is in normal operation, it can effectively protect the transformer. More importantly, when an accident occurs, the fuse can be timely for short circuit. switch to achieve the purpose of current limiting, so that all kinds of components in the loop can also be protected.

At present, most of the Loop Feed Padmounted Transformers in the market are developed with Chinese technology, so it will not take a lot of time and energy to inspect and repair them, and switchgear, load switches, circuit breakers and other spare parts equipment It has a high level of craftsmanship and is organically combined with the current thriving information technology.

This leads to a high degree of intelligence of the Loop Feed Padmounted Transformer, which effectively reduces the pressure on mechanical operation and maintenance staff, and enables automated terminals to be widely used.

What causes Loop Feed Pad Mounted Transformer failure?

Filled Loop Feed Pad Mounted Transformer

PT and PC can allow relevant management personnel to obtain the required data information, so that the distribution network automation can receive support from the data to complete the circulation smoothly. If the PT and TC are faulty, the quality of the product should be fully considered. If the product has serious quality problems, various faults will occur during the use of the PT and TC.

Therefore, when purchasing related items, the quality of the products themselves should be checked in time, and the market supervision department should strengthen the management of component suppliers to prevent products that do not meet relevant standards from appearing in the market.

Operating mechanism malfunction

Loop Feed Pad Mounted Transformer

When installing the Loop Feed Pad Mounted Transformer, the selected position is not fixed. Generally speaking, it will appear in the position used in the system.

If the environment has a large water content and the stagnation time is too long, the It will cause corrosion in some important parts, such as the contacts of the control circuit and the contacts of the spring switch.

As a result, the operating mechanism cannot operate normally, which in turn leads to a series of failures.

If the environment of the Loop Feed Pad Mounted Transformer is too harsh, it is necessary to strengthen the inspection, overhaul and maintenance of the Loop Feed Pad Mounted Transformer to ensure that the operating mechanism can operate more stably.

Read my article on 1500 kva Transformer

Load switch failure

Padmounted Transformer

The load switch is always an important part of the Loop Feed Pad Mounted Transformer. If it fails, the Loop Feed Pad Mounted Transformer will not work properly.

At present, most companies use the combination switch method to ensure the safety of distribution transformers.

When the fuse is blown, it is easy to cause the load switch to fail. In this way, the thimble trigger mechanism cannot normally complete the tripping operation, and the scope of the fault is limited. will be bigger.

Arrester failure

In the Loop Feed Pad Mounted Transformer, the arrester is mainly to prevent the corresponding electrical equipment from being eroded by lightning.

If the arrester fails, the wires in the Loop Feed Pad Mounted Transformer will be short-circuited and open-circuited.

When the discharge of the cable head occurs, the whole power distribution Loop Feed Pad Mounted Transformer will have a more serious abnormality.

Thermal failure of the Pad Mounted Transformer

Radial Feed Padmounted Transformer

The shell material used by the Pad Mounted Transformer in the Loop Feed Pad Mounted Transformer is quite special, has a strong ability to absorb solar radiation, and has a strong airtightness.

This also leads to the fact that the internal heat of the Pad Mounted Transformer cannot be dissipated to the outside in time, and even if the corresponding ventilation device is installed, the heat cannot be dissipated, so that the internal temperature of the transformer will exceed the relevant standards and become slower to operate.

At the same time, the Pad Mounted Transformer is often installed outdoors, and is often eroded by wind and rain, resulting in a large amount of dirt inside the Pad Mounted Transformer. If it is not processed for a long time, its normal operation will be affected.

Especially in a highly humid and hot climate, in order to reduce the adverse effects of humid and hot water steam on the box-type transformer, a corresponding temperature control device is generally installed inside the Loop Feed Pad Mounted Transformer, but according to the actual situation, it can be known that this method is not effective.

To solve the problem of corrosion, the corresponding components inside the equipment will have corresponding safety failures.

When overhauling the Loop Feed Padmounted Transformer, power outage protection should be carried out according to the corresponding regulations, and various equipment should be turned on based on this, and in-depth overhaul of various links should be carried out according to operating standards and basic requirements.

Since the box itself cannot dissipate heat by itself, a lot of heat will inevitably accumulate inside it, which will easily cause damage to local related equipment.

Therefore, the actual upper limit of the actual capacity of various equipment should be fully considered during maintenance, and according to the equipment According to the climate characteristics, temperature conditions and geographical environment, the maintenance time and method can be flexibly selected.

In this way, the Pad Mounted Transformer can be protected to the greatest extent and its life cycle can be extended. When installing the Pad Mounted Transformer, an area that consumes less electricity during the day and more electricity at night should be selected.

When overhauling, the maximum load should be removed, the actual load in the power distribution Loop Feed Transformer should be fully detected, and the debris existing inside the equipment should be thoroughly removed, so that the A series of failures caused by it can be effectively controlled.

Troubleshooting Strategy of Loop Feed Pad Mounted Transformer

Filled Radial Feed Pad Mounted Transformer

The maintenance of Loop Feed Pad Mounted Transformer is relatively complicated, and it is easy to encounter different types of faults. In order to deal with such faults effectively, a reasonable method should be selected according to the basic characteristics and causes of the fault. Generally, it can be started from the installation process, cable termination and Loop Feed Padmounted Transformer.

First, scientific positioning, rational layout, and long-term design. The staff should elevate the actual position of the Loop Feed Transformer cable room according to the actual situation, so as to minimize the adverse effect of the ground wet gas on the Loop Feed Padmounted Transformer;

Second, take reasonable measures to make the cable firmer and avoid a series of problems caused by poor cable contact;

Third, strictly review the installation process. The installation of the Loop Feed Pad Mounted Transformer is relatively complex and professional, using a large number of precise installation processes. The review and testing of the installation process should be done well to prevent improper installation processes from interfering with the normal operation of the Loop Feed Padmounted Transformer;

Fourth, improve the shell material of Loop Feed Transformer. Because the Loop Feed Padmounted Transformer is often used in harsh environments and is easily damaged by various environmental factors, stainless steel should be used as its shell, which can effectively improve the operation of the Loop Feed Pad Mounted Transformer. efficiency and increase its service life;

Fifth, add the SF6 barometer.

The SF6 barometer can be set on the switch surface of the distribution ring network to prevent the phenomenon of abnormal arc extinguishing caused by improper operation.

In order to deal with the failure of the Loop Feed Pad Mounted Transformer in an all-round way, not only technical measures should be taken, but also daily management should be strengthened, regular maintenance, inspection of the Loop Feed Padmounted Transformer and various auxiliary equipment, focusing on monitoring the distribution Loop Feed The temperature and humidity conditions of the Padmounted Transformer during operation can detect the tendency of failure in time, and minimize the frequency of various failures through preventive measures.

Conclusion

The Loop Feed Pad Mounted Transformer will be affected by various factors and produce a large number of faults during the operation process. In order to effectively solve such faults, the source of such faults should be identified, and inspection and maintenance efforts should be strengthened, especially for needles.

The Loop Feed Padmounted Transformer, where the team is located, should focus on monitoring its temperature conditions and humidity conditions, and formulate a reasonable prevention and control plan to reduce the probability of various failures, so as to truly eliminate the failure and maintain Safe and efficient operation of the Loop Feed Pad Mounted Transformer, giving full play to its advantageous functions.

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About Bin Dong

Hello, I am Bin, General manager of Daelim which is a leading transformer manufacturer. If you have problems when you are looking for the equipment, what you need to do is tell us.