Hermetically Sealed Transformer

Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of hermetically sealed transformer in China. If you're going to buy customized hermetically sealed transformer made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.

product introduction

A hermetically sealed transformer refers to a transformer in which the core components such as the iron core and winding are completely sealed by a metal or composite material shell, and the interior is usually filled with insulating oil or epoxy resin and other media.

The full seal transformers' core features include:

• Sealing: The shell is welded or bolted to isolate external air and moisture, and the protection level can reach IP65 or above (refer to IEC 60529 standard).
• Safety: Avoid oil leakage or exposure of internal components, reduce fire risk, suitable for densely populated areas.
• Low maintenance: Due to the sealed design, there is no need to regularly clean internal dust or replace desiccants.

Technical Specification

Core strengths

Compared with traditional open transformers, fully enclosed designs have the following advantages:

• Environmental adaptability: It can operate stably in environments ranging from -40 ℃ to+50 ℃ (according to GB/T 6451-2015 standard) or high humidity.
• Noise control: The casing can reduce the no-load noise to below 45 decibels (measured data source: report from China Electric Power Research Institute).
•  Long life: The sealing structure delays the aging of insulation materials, and the design life usually exceeds 20 years.

Typical application scenarios

Fully enclosed transformers are commonly used in the following fields:

• Urban power distribution: Scenes such as subways, hospitals, and commercial centers that are sensitive to safety and noise.
• Industrial sector: environments with dust or corrosive gases such as chemical and mining industries.
• New energy: outdoor projects with harsh conditions such as photovoltaic power plants and offshore wind power.

frequently asked questions

1. Do we need a heat dissipation design?
Fully enclosed transformers achieve heat dissipation through shell heat sinks or forced air cooling (such as installing fans), and large capacity models require reserved ventilation space.
2. Is the cost higher?
The initial investment is about 15% to 20% higher than that of open plan, but it saves maintenance costs in the long run and has lower overall costs.

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