480V Class H Encapsulated Transformer

Henan GNEE Electric Co., Ltd. is one of the leading manufacturers and suppliers of 480v class h encapsulated transformer in China, also supports customized service with low price. Welcome to buy discount 480v class h encapsulated transformer for sale here from our factory. If you have any enquiry about pricelist, please feel free to email us.

encapsulated transformer video

Product Introduction

Transformers encapsulated operate without oil, eliminating risks like leaks and fires. The SCB series cast resin type transformers excel in versatility, widely used in commercial buildings, residential areas, and industrial facilities. In commercial spaces, they ensure safe power supply in malls and hospitals; in residential communities, they provide efficient, low-risk electricity distribution. For industrial sites, their durability meets heavy-duty demands.

Key to their appeal is exceptional fire resistance: the epoxy resin encapsulation acts as a flame-retardant barrier, minimizing fire risks and enhancing safety. This makes SCB cast resin transformers a reliable choice for environments prioritizing security and compliance, combining robust performance with peace of mind across diverse applications.

Class H encapsulated transformer Technical specification

Frequency: 30/60 Hz

Primary Voltage: 480 V

Secondary Voltage: 380 V (with Brought-out Neutral)

Connection Group: Δ-Yn (Delta-Wye connection, neutral at low-voltage side)

Insulation Class: Class H

Core Material: High-Grade Silicon Steel Laminations

Temperature Rise Limit: 150 K (at rated load)

Protection Level: NEMA 1 (Indoor, equivalent to IP20)

Finished 480V Class H encapsulated transformer

Characteristics of Transformer Insulation Class H

Class H is a high-temperature resistance insulation class defined by international standards (e.g., IEC). Here are its key features:

1. Maximum Temperature Rating

Winding Temperature Rise Limit: Up to 125K (calculated from an ambient temperature of 40°C).

Actual Operating Temperature: The winding can withstand a maximum temperature of 180°C, significantly higher than lower classes (e.g., Class B: 130°C, Class F: 155°C). This makes it suitable for high-heat and heavy-load environments.

2. Insulation Materials

Class H insulation uses high-temperature-resistant materials, such as:

Nomex Paper (aromatic polyamide fiber): Offers excellent heat resistance, insulation, and mechanical strength.

Silicone Rubber: Resistant to aging, corrosion, and suitable for humid or chemically corrosive environments.

Modified Epoxy Resin: Stable at high temperatures, commonly used to encapsulate windings in 480V class H encapsulated transformers.

3. Advantages

High Reliability: Maintains performance during long-term heavy loads with slow insulation degradation.

Enhanced Safety: Fire-resistant materials reduce risks in crowded or flammable environments (e.g., commercial buildings, hospitals).

Environmental Friendliness: Oil-free design eliminates leakage and pollution risks.

Low Maintenance: Moisture-resistant materials minimize insulation deterioration from humidity.

Factory Showcase

What are the application scenarios of Class H dry-type transformers?

Class H dry-type transformers, with their high-temperature resistance (180°C insulation class) and oil-free design, are widely used in scenarios requiring reliability, safety, and durability. Here are their primary application scenarios:

1. Industrial Manufacturing

Steel and Metallurgy: Powering furnaces, rolling mills, and heat treatment lines in high-temperature workshops (e.g., 50°C+ environments).

Chemicals and Petrochemicals: Providing power in explosive or corrosive environments (e.g., refineries, chemical reactors) due to their non-flammable, oil-free design.

Heavy Machinery: Supporting CNC machines, forging equipment, and plasma cutters with stable power during high-load operations.

2. Energy and Power Infrastructure

Renewable Energy: Operating in solar/wind farms (e.g., desert or high-altitude sites) with extreme temperatures (-20°C to 60°C) and harsh weather.

Data Centers and UPS Systems: Ensuring 24/7 power supply for servers and backup systems, prioritizing low noise, high efficiency, and reliability.

3. Transportation and Urban Infrastructure

Rail and Subways: Installed in tunnel substations to power traction systems, signals, and ventilation (compact design for limited spaces).

Marine and Ships: Used in ship cabins or offshore platforms for their vibration resistance and salt corrosion tolerance (e.g., cargo ships, drilling rigs).

4. Commercial and Public Buildings

High-Rise Buildings: Placed in basements or floor-level switchrooms for fire safety in densely populated areas (e.g., skyscrapers, shopping malls).

Hospitals and Labs: Powering MRI machines, operating rooms, and sensitive equipment with stable, low-electromagnetic interference (EMI) power.

5. Special Environments

Mining and Tunnels: Deployed underground in dusty, humid, or gassy environments (e.g., coal mines, tunnel construction) with IP-rated protection.

Mobile and Emergency Power: Used in mobile power stations, construction sites, or disaster relief for their portability and durability in rough conditions.

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