Nuralam Siddik, Fall 2020 ID Meeting has been recognized as agreeable in meeting the prerequisites for the level of. Mahbub-Ud-Jaman Department of Electrical and Electronic Engineering, DIU for his continuous help, support, suggestion, direction and valuable research to go beyond the mechanical temporary work. I would like to thank the organization of Basic Power Engineering Ltd for giving me the opportunity to meet Industrial Training there.
Likewise, my appreciation goes to all the delegates of “Basic Power Engineering Ltd” for their genuine co-movement, support and critical advice they gave me during the two-month planning process. It has three decades of experience in carrying out the full spectrum of electrical contacts for the range of engineering, procurement and installations. They are also one of the leading suppliers and service providers of all types of LV, HV and EHV distribution equipment and accessories widely used in electrical installations and substations.
The company's priority is an in-depth understanding of customers' business requirements and their effective solution. We strive to give them the opportunity to do their best to advance important things and present first-rate organizations in the most limited satisfaction of their customers. In my exam life, the single greatest opportunity to combine hypothetical information with pragmatic information is the period of mechanical connection ― which comes as once in school life.
Assuming that the hypothetical information is a glass of water, the reasonable information would be to drink the water. It is in any case simple to make a person understand about a firebox appearing and burning basically compared to the hypothetical portrayal of one who has never seen a firebox. So the modern connection is the interaction where the learner can mix his hypothetical information with reasonable information expanding his working capacity, expertise,.
Mechanical connection makes us reliable to be familiar with the modern climate and further improves mental strength and motivation to accept self-responsibility. I have tried to gather all the necessary data to make it as meaningful to me as it is to everyone.
Specific objectives
Data collection
Primary data
Since the beginner program residency was extremely short, it was impractical to present everything in detail. While gathering information at Basic Power Engineering Limited, workers did not discover enough information to meet the association's privacy policy. Currently, the company has developed as one of the main associations in the electrotechnical field and offers a comprehensive range of supplies and services for the mechanical field.
They are also one of the main suppliers and service providers of all ranges of LV, HV and EHV distribution. Since there are no rotating parts of the transformer, there is no power shortage due to air check. An open circuit test is a test carried out on one or the other side of a transformer, usually with a high voltage side and with the necessary number of estimation instruments associated with the transformer and applied to the evaluated typical full repetition of the transformer.
In this strategy, the center and loop of the transformer are completely immersed in protective oil. This hot light oil enters the line and enters the line's virus oil transformer tank. In substations, the required total load can be provided by a mounting number of
In the event that the transformers are equally associated, there will be later grade for the development of a substation to provide a hope beyond the limit of the transformer previously established. In the event that there will be any breakdown of a transformer in an arrangement of transformers associated in equal, there will be no interference of the power supply, for fundamental administrations. On the off chance that any of the transformers are removed from the framework.
In the wake of determining the estimate of the center, we cut the middle using an alternative machine to get our necessary shape. This will direct the output voltage by adjusting the number of turns and thus changing the turns ratio of the transformer. Remarks: The voltage ratio between the HT and LT side of the transformer for each tap position is OK. Polarity of the transformer is subtractive.
For obstruction test first we need to point the meter to measure the resistance on HT side and then simply hang the cinch test on the meter on the HT lead like - AB, BC, CA and find out the result for that side. To carry out the high voltage test on the high voltage winding, we need to short-circuit the three-phase connection on the HV side, the LV side and the housing/tank with the basic earth. This is a great opportunity to gather knowledge about the business world before entering the field of work.
Secondery data
Laminations of the study
- Company Name
- company profile
- Major works involved
- Department of basic power engineering limited
- Office address
- Corporate office
- Factory
Today, Basic Power Engineering Ltd is one of the prestigious providers in terms of quality, supply and most reliable switchgear manufacturers providing excellent electrical equipment such as power transformers, distribution transformers, dry transformers, feeder automation, network automation and SCADA software, medium voltage Switchgear, medium voltage switchgear components, outdoor switchgear and equipment, power monitoring and control, protective relays, energy management, fault transition indicators. At the point when the transformer center or loop is heated under full load, the oil heats up and becomes lighter and rises to the top. Then the hot oil in the tube cools in contact with the air and descends.
There are two windings twisted across the center of the transformer, which are shielded from each other. The development of the CCA (Core Coil Assembly) by providing sufficient spiral and pivotal backings prevents the pressure from damaging the windings. The head of the leg is tightened with cotton, and afterwards the press board is put back on top of the curl for protection between the loop and the upper channel.
In case the high voltage Delta side is connected, the low voltage side Y, and vice versa. At that point, the transformer is ready for the next stage of connecting the winding materials and going into the heating room. At that point we connect the three-phase wire outside the transformer and match the intended ratio to the defined ratio.
At the time when we perform the Megger test on a transformer from the start, we connect the test of the HV side with the Earthling, then the LV side with the Earthling, and afterwards the HV side with the LV side for 30 seconds. In the event that the transformer remains to withstand in the wake of storing this voltage for 1 min, it shows that the transformer remains safe in voltage floods which may be caused by lightning or other surges.
Construction and operation of transformer
At that point when transformer work, then voltage increase current decrease or voltage decrease increase current. Increase transformer: At that point when that transformer work then voltage increase current drop or voltage decrease increase current. Step down transformer: At that point when transformer work, then voltage increase current drop or voltage decrease increase current.
Portray various pieces of the transformerTransformer
Instrument Transformer
Proper use of the extremely penetrating material helps achieve a small hesitation to stay centered in an attractive transition way. However, a larger cross-section conductor will also have the undesirable effect of eddy current propagation when resonant current is available in the winding with a non-linear load. After orchestrating the center, we align the center with the 4 channels and tie the bars and screw them as shown in Figure 5.
After setting the press board, a sort of center C is set on the center legs to complete the center plans. This internship gave me very crucial practical experience in transformer manufacturing which gives me confidence in the practical field.
The materials uses in transformer construction discussion
Cast resin Transformer or dry type transformer
This type of A transformer is used as an elective where there is a chance of an accident due to a fire in an oil transport transformer. This type of transformer is cheaper to use and less likely to burst into flames.
Advantage of dry type Transformer
Uses of CRT
Transformer losses
No load test or open circuit test
The data that is accessible by testing the open circuit
The data that is accessible by testing the short circuit
The technique for cooling the Transformer
Before placing the center, on the cotton tape, there is 6mm protective paper wrapped in two sections (3mm+3mm); which is used for protection between the hub and the winding and gives a basic spacer within the three hubs that is insulated between the loop and the channel.
Oil inundeted selt-cool
Purposees behind parallel operation
Equipment classification of 500kVA ,Three phase distribution
Transformer core
To make a star association on the LT side, we need to make a 3-phase association and regular neutral with three loops. To test the no hope from the beginning, we associate the three-phase supply to LT terminals and we need a watt meter and strut meter.
Cupper
- General Calculation of a Transformer
- Core Calculation
- The process of Transformer Manufacturing
- Cutting of core
- Assembling of core
- The system of making transformer winding
- Assembling coil into the transformer core frame
- Working process of Tap changer
The windings are designed to guarantee reduced pivotal loads under short-circuit conditions and furthermore to withstand drives and surges. For Power Transformers, both low-voltage and high-voltage windings are of the plate type, which provides the most elevated resistance to obstruction.
- Transformer testin proess
- Test for transformer oil
- Test for Voltage Ratio
- Test for cupper resistance
- Test when transformer is no- load condition
- Test when transformer is full-load condition
- Test for Megger
- Test for High Voltage
The test is performed on the high voltage (HV) side of the transformer, where the low voltage (LV) side or the optional side is shorted. From the beginning we have given 28 kV from the high voltage test chair, at that point it goes to the limit.
Recommendation
Conclusion
I think the practical experience I have gathered at Basic Power Engineering Limited will help me in my professional life.
