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How Much You Know For The Different Types Of Transformers?

2025-06-12

Transformers play an important role in modern power systems. From daily life to large power system applications, transformers and related key equipment work together to manage voltage levels, providing greater convenience in our lives. At NPC ELECTRIC, we are proud to offer a comprehensive portfolio of transformer products designed to meet the diverse needs of our customers. Understanding the different types of transformers we offer is the first step in selecting the ideal solution for reliable power for your specific application.

Our Premier Transformer Offerings:

At NPC ELECTRIC, our catalog is structured to help you easily find the transformer solution that precisely matches your requirements.

Pad-Mounted Transformers
Pad-mounted transformers are designed for underground power distribution systems, commonly seen in residential subdivisions, commercial centers, and industrial complexes. They are housed in secure, tamper-resistant steel cabinets mounted on a concrete pad. This design offers enhanced safety and aesthetic appeal compared to overhead lines.

Single Phase Pad Mounted Transformer: Ideal for serving residential loads or light commercial applications requiring single-phase power. Our single phase transformer pad-mounted units are compact, efficient, and built for long-term reliability. These transformers are designed for easy access for maintenance while ensuring public safety.
Three Phase Pad Mounted Transformer: Essential for powering larger commercial establishments, industrial facilities, and multi-unit residential complexes that require three-phase AC power. NPC ELECTRIC's three-phase pad-mounted units deliver robust performance and can handle significant load variations, making them a cornerstone of modern power distribution networks.

Distribution Transformers: The Workhorses of Local Power Delivery
Distribution transformers are critical components in the final stage of the power distribution network, stepping down medium voltage from primary lines to the lower voltages used by consumers. Their efficiency and reliability are paramount for minimizing energy losses and ensuring consistent power supply.

Oil Immersed Transformer: These transformers use mineral oil as a coolant and insulating medium. The oil helps to dissipate heat generated by the primary and secondary windings and provides excellent dielectric strength. NPC ELECTRIC's oil-immersed distribution transformer range is known for its durability, cost-effectiveness, and suitability for a wide array of outdoor applications requiring robust performance, from urban networks to rural electrification.
Substation Transformer: While often larger, substation transformers in the context of distribution can refer to units within a distribution substation that further step down voltage for local circuits. These can be considered a specialized type of distribution transformer or a smaller power transformer, depending on their voltage and MVA rating. They play a pivotal role in segmenting the power systems and ensuring voltage stability for entire communities or industrial zones. Our substation transformers are designed for high power throughput and operational longevity.

Pole Mounted Transformers: Elevating Power Distribution
A common sight in many areas, Pole Mounted Transformers are installed on utility poles, typically serving residential overhead distribution lines or smaller commercial loads. They are a cost-effective solution for widespread power delivery.

Conventional Type Single Phase Pole Mounted Transformer: These are standard single phase transformer units widely used for supplying power to individual homes or small groups of customers. NPC ELECTRIC offers reliable and efficient conventional pole-mounted transformers that meet stringent industry standards for performance and safety in power distribution.
Completely Self-Protected (CSP) Single Phase Pole Mounted Transformer: CSP transformers include internal protective devices such as current-limiting fuses and secondary circuit breakers. This design enhances safety and reliability by protecting the transformer from overloads and short circuits, and also protects the wider power systems from faults originating in the transformer. These transformers are designed to minimize service interruptions and maintenance needs.

Dry Type Transformers: Safe and Versatile Indoor Power Solutions
Dry type transformers use air or non-flammable solid insulation systems for cooling and insulation, rather than oil. This makes them an environmentally friendly and safer option, especially for indoor installations where fire hazards are a concern.

Epoxy Resin Cast Dry-Type Transformer: In these dry type transformers, the primary and secondary windings are encapsulated in epoxy resin under vacuum. This provides excellent protection against moisture, dust, and corrosive atmospheres, as well as high mechanical strength and outstanding dielectric properties. NPC ELECTRIC's epoxy resin cast dry type transformers are ideal for demanding applications requiring high reliability and safety, such as in hospitals, data centers, commercial buildings, and sensitive industrial processes. These winding transformers offer low noise, minimal maintenance, and can be installed close to the load, reducing cabling costs.

Power Transformers: Handling High Voltage and High Power

Power transformers are the giants in the transformer family, used in transmission networks to step up voltage at generation stations for efficient long-distance power transfer, and to step down voltage at main substations before it enters the distribution transformer network.

NPC Power Transformers

NPC ELECTRIC Transformer

Understanding the distinctions between a pad-mounted transformer, a distribution transformer, a pole-mounted unit, a dry-type transformer, or a large power transformer is key to optimizing your electrical infrastructure. Each type of transformer in our catalog is built with precision, utilizing high-quality materials for the core and winding transformers to ensure optimal performance.

The main products we provide are listed below:

Power Transformers up to 230kV: Critical for high-voltage applications requiring efficient power transformation.
Distribution Transformers up to 35kV: Essential for localized power distribution networks, ensuring a reliable electricity supply.
Pad Mounted Transformers up to 44kV: Ideal for outdoor installations, featuring robust construction and advanced insulation.
Pole Mounted Transformers up to 34.5kV: Designed for specific applications requiring elevated positioning and operational resilience.
Dry Type Transformers up to 35kV: Offering a safe and maintenance-free alternative for indoor installations where oil-filled transformers are impractical.