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Date：05-29-2025
500 KVA-24GrdY/13.8-0.240/0.12 kV Three Phase Loop Type Pad Mounted Transformer is a technologically advanced electrical device designed to meet the diverse power distribution needs of modern buildings.
Rated for primary voltage of 24GrdY/13.8 kV and having two secondary voltages of 0.24 kV and 0.12 kV, this transformer possesses unique characteristics that make it extremely efficient, stable, and versatile for application in numerous commercial and industrial applications.
Its dead-front design, loop-type structure, and advanced safety and monitoring provisions contribute to its user-friendliness as well as its performance. In this article, we will explore the technical features, design features, applications, and benefits of the transformer in relation to its role in modern power distribution systems.
Transformers pad are an extremely crucial component in power distribution systems, particularly in residential and urban areas where space, looks, and safety are a factor. Pad-mounted transformers, unlike pole-mounted transformers, are mounted on the ground on top of a concrete pad, thus best suited for areas with underground power. Transformers are generally housed in weather-resistant, tamper-proof enclosures, thus offering ruggedness and protection in various environmental conditions.
The Three Phase Loop Type Pad Mounted Transformer is designed to be used with three-phase power, which is the commonly used type of power in commercial and industrial buildings based on its capacity to provide high loads without hassles. The loop-type design makes the transformer fit into a radial or loop feed distribution system, making power delivery flexible and redundant. This makes it an ideal choice for a building where there’s a requirement to create an uninterrupted and assured power supply.
The 500 KVA-24GrdY/13.8-0.240/0.12 kV transformer is constructed using precise specifications to ensure that it has an effective solution for modern electrical systems. The following is a description of its most significant technical features:
●KVA Rating: Its KVA rating is 500 kilovolt-amperes, indicating its ability to handle heavy electrical loads. It thereby qualifies for commercial use in medium to large-size commercial buildings, office complexes, shopping malls, and industrial installations.
●Primary Voltage: The primary voltage is established as 24GrdY/13.8 kV. “GrdY” refers to a grounded wye connection, which is a well-balanced and stable source of voltage for three-phase applications. The 24 kV line-to-line voltage and the 13.8 kV line-to-neutral voltage are suitable for high-voltage distribution systems.
●Secondary Voltage: Secondary transformer side is specifically designed to deliver two voltages of 0.24 kV (240 V) and 0.12 kV (120 V). The dual voltage makes the transformer support supplying power to different equipment and systems in a building in response to different electrical requirements.
●Loop-Type Configuration: Being a loop-type transformer, it comes with two sets of incoming high-voltage terminals and three two-position load switches. This configuration enables the transformer to be fed in a loop feed system where power is supplied from both ends, which is more reliable and minimizes downtime during maintenance or power outages.
●Dead-Front Design: The transformer is a “dead front,” where all the high-voltage components are totally enclosed and insulated and therefore more secure from accidental touching and enhancing the safety of operators and the public.
The 500 KVA transformer has some of the most innovative features that make it efficient, dependable, and safe. The features are divided into the high-voltage (HV) and low-voltage (LV) compartments of the transformer.
The HV room is designed to house the high-voltage input power and ensure safe and efficient operation. Some of the key components include:
●Two Sets of Incoming Terminals: The loop-type configuration comprises two sets of high-voltage incoming terminals, allowing the transformer to be connected to a loop feed system directly. It ensures power rerouting in case of fault or maintenance, ensuring higher system reliability.
●Three Two-Position Load Switches: The switches allow operators to regulate power transfer through the transformer so that isolation or connection can be made depending on needs. This facilitates maintenance and fault handling.
●Three Bay-O-Net Fuses: Expulsion-type fuses are applied for protecting the transformer against overcurrents, disconnecting fault currents to prevent damage to equipment. They can be easily replaced, reducing maintenance time.
●Three Current-Limiting Fuses: These fuses offer additional protection by limiting the magnitude of fault currents, protecting the transformer and the attached electrical network.
The LV room has monitoring and protection devices for ensuring efficient functioning and protection of the transformer. Key ones are:
●Pressure Relief Device: This device protects the transformer from overpressure conditions because of internal faults or thermal fluctuations, making safe operation possible.
●Liquid Level Indicator: This meter monitors the level of insulating liquid (generally oil) within the transformer to give proper insulation and cooling.
●Oil Thermometer: The thermometer monitors the temperature of the insulating oil to help operators monitor the thermal performance of the transformer and prevent overheat.
●Vacuum Pressure Gauge: It monitors the internal pressure of the transformer, providing early warning of defects such as leakage or gas buildup.
500 KVA-24GrdY/13.8-0.240/0.12 kV Three Phase Loop Type Pad Mounted Transformer is particularly appropriate for use in buildings, where its two secondary voltages offer an added advantage. The 240 V output can feed heavy equipment, HVAC, and industrial machinery, whereas the 120 V output can feed lighting, office machines, and other low-voltage loads. This has made the transformer particularly appropriate for:
●Commercial Structures: Office complexes, malls, and hospitals value the transformer’s ability to deliver a variety of voltages to cater to diverse electrical loads.
●Industrial Facilities: Industrial complexes and warehouses utilize the transformer’s high capacity and reliability to power big machinery and production lines.
●Mixed-Use Projects: In buildings where commercial and residential areas are housed within a single building, the dual-voltage output guarantees compatibility with various electrical systems.
The dead-front design and loop-type configuration also enhance the transformer’s suitability for urban environments, where safety and reliability are of the highest concern. The loop feed system ensures a smooth supply of power, even during the process of maintenance, and the dead-front design minimizes the risk of electrical hazards.
The 500 KVA transformer possesses several core benefits that qualify it as an initial choice for modern power distribution systems:
●Versatility: Dual programmability of the two secondary voltages and 240 V and 120 V enable the transformer to supply the wide range of electrical requirements with minimal usage of additional equipment.
●Reliability: Loop-type construction and heavy-duty protection features, such as bay-o-net and current-limiting fuses, ensure the trouble-free power supply and fault protection.
●Safety: Dead-front construction and advanced monitoring instruments (e.g., pressure relief device, oil thermometer) enhance operators’ and the general public’s safety.
●Efficiency: The design of the transformer minimizes energy loss to the least, hence ensuring efficient delivery of power and cost savings in operation.
●Compact and Aesthetic Design: Since it is pad-mounted, it is mounted on the ground and housed in a weatherproof enclosure, hence suitable for use in urban areas where space and appearance are a concern.
Proper installation and upkeep are needed to ensure the long-term operation of the 500 KVA transformer. The transformer should be installed on level concrete where it is adequately ventilated and has adequate clearance to ensure maintenance. The liquid level gauge, oil temperature, and vacuum pressure should be frequently checked to ensure the condition of the transformer and prevent a situation that would lead to overheating or failure of insulation.
The bay-o-net and fuses having current limitation should be inspected at regular intervals to establish that they are operating as expected, and the load switches must be tested to confirm proper working. The enclosure of the transformer must also be examined for corrosion or damage, especially in aggressive environmental conditions.
The 500 KVA-24GrdY/13.8-0.240/0.12 kV Three Phase Loop Type Pad Mounted Transformer is an efficient and dependable power distribution solution for today’s requirements. Its secondary voltage capability, loop design, and groundbreaking safety features make it the ideal choice for buildings with fluctuating electrical needs.
With efficiency, safety, and versatility, this transformer is central in providing a stable and continuous supply of power for commercial and industrial applications. With growing urbanization and energy demands, such transformers will be even more essential to powering the buildings of the future.
For high-quality, customized transformer solutions, contact ANHUANG, a trustworthy 2004 manufacturer with experience in 3.6 kV to 40.5 kV medium-voltage equipment. Visit our website to find more information about our OEM and ODM services and power your projects with precision and dependability.
