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±·´Ç³¾±ð³æ®--Proven Performance as Dry Type Transformer Insulation

For more than 45 years, k8ÓéÀÖâ„¢ ±·´Ç³¾±ð³æ® has been the material of choice for dry type transformer insulation. That’s because ±·´Ç³¾±ð³æ® brand insulation helps provide proven performance and enhanced safety. 

From lighting ballasts and uninterrupted power supplies (UPS) to medium-voltage substations (>1.2 kV), a critical key to success is the use of ±·´Ç³¾±ð³æ® papers and ±·´Ç³¾±ð³æ® based laminates as dry type transformer insulation.

Outstanding thermal stability, mechanical toughness, inherent dielectric strength, flame resistance and chemical compatibility make ±·´Ç³¾±ð³æ® papers and ±·´Ç³¾±ð³æ® based laminates ideal as dry type transformer insulation.

Ventilated dry type transformers (VDT) and cast resin transformers continue to grow in popularity around the world.  The use of ±·´Ç³¾±ð³æ® insulation is contributing to this trend by helping enable major design improvements in these types of transformers.

Enhanced Safety

Dry type transformers insulated with ±·´Ç³¾±ð³æ® offer enhanced safety because there are no fluids to spill, explode or burn, and ±·´Ç³¾±ð³æ® 400 Series papers do not support combustion in air.  And, in the case of a building fire, this series of ±·´Ç³¾±ð³æ® insulation does not produce amounts of toxic smoke or dangerous particles.

Low Transmission Losses

Because dry type transformers insulated with ±·´Ç³¾±ð³æ® can be located close to their loads—inside factories, schools, hospitals and apartments— it helps to shorten low-voltage lines with a consequent reduction of the related losses.

Reduced Cost, Size and Weight

Dry type transformers insulated with ±·´Ç³¾±ð³æ® can be designed with a temperature rise up to 150K, requiring less conductor and core steel, which can result in a lower initial cost.  The reduced size and weight contribute to ease of installation and the smaller cores result in lower no-load losses.

Increased Overload Capabilities

When dry type transformers operate continuously at or near their rated loads, efficiency is critical.  ±·´Ç³¾±ð³æ® insulation meets the challenge.  For example, an 80K temperature rise VDT transformer insulated with ±·´Ç³¾±ð³æ® can operate continuously at 133% of the rated load.

Improved Capability for Harmonic Loading

Dry type transformers supplying loads with heavy harmonic content frequently experience high hot spot temperatures.  This is no problem for dry type transformers insulated with ±·´Ç³¾±ð³æ® because they have a large reserve temperature capability to accommodate these hot spots.

Resistance to Humidity

Because the properties of densified ±·´Ç³¾±ð³æ® papers, such as ±·´Ç³¾±ð³æ® 410, are insensitive to moisture, dry type transformers insulated with ±·´Ç³¾±ð³æ® perform in humid environments, such as those found in marine applications.

Typical Uses in Dry Type Transformers

±·´Ç³¾±ð³æ® papers, particularly those in the ±·´Ç³¾±ð³æ® 400 Series, and ±·´Ç³¾±ð³æ® based laminates are used in dry type transformers as:

• Turn and Conductor insulation

• Layer and barrier insulation

• Core insulation

• Lead and tap insulation

• End filler

• Channel and Washer

• Radial and axial spacers

Typical Dry Type Transformer Applications

±·´Ç³¾±ð³æ® papers, particularly those in the ±·´Ç³¾±ð³æ® 400 Series, and ±·´Ç³¾±ð³æ® based laminates are used in a wide variety of dry type transformer applications, including:

• Large power, medium voltage and high voltage (>1.2 kV)

• Medium voltage, general purpose (>1.2 kV)

• Medium voltage, substation (>1.2 kV)

• Low voltage, general purpose/specialty (<1.2 kV)

• UPS/data center/converter

• Lighting ballast

• Traction

• Welding

• Mining

• Power conversion