Cast resin transformers are dry-type transformers. The magnetic circuit and windings are not immersed in an insulating liquid but are cast with an epoxy resin mixture. These special transformers are finding an ever-increasing scope of application for their high-service reliability.
Cast resin transformers are a popular choice for use in commercial, industrial and residential sites. These power transformers require practically no maintenance and have a much lower environmental impact than traditional oil-immersed transformers. Auto-extinguishing and other safety features make it the obvious choice for indoor applications and other areas with high fire risk.
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Reasons to choose Cast Resin Transformers
Reduced risk of fire and increased levels of safety.
Suitable for indoor use. External applications available on request. Can close couple to main distribution switchgear. (No cabling, bus-coupled)
Smaller footprint as the transformer is tall and slim with less instrumentation.
Easily retrofitted into commercial buildings.
Maintenance free
No need for costly civil construction and installation may be closer to critical load
Environmentally friendly.
Encapsulated (Cast Resin Potted) Transformers
Encapsulated (Potted) Transformers (also referred to as Epoxy Resin Encapsulated) are designed for applications where the environmental conditions would not permit a general purpose ventilated dry type transformer. The entire transformer core & coil is encased in a silica sand / polyurethane mixture which protects the windings from any airborne contaminants and moisture.
Typical areas of use include:
Corrosive Environments: Petro-Chemical, steel, pulp and paper industries
Damp conditions: Mines, pump-houses underground or rooftop service areas
Industrial applications:
processes with high degree of airborne dust or conductive particles
Specification
Features & Benefits
Mixture of silica sand resin forming a solid mass completely encloses and protects the core and coil, also significantly reduces audible noise.
Windings utilize Class 220°C Insulating rated for 150°C Rise, but designed to operate at 115°C maximum.
The transformer’s core is solidly grounded.
Enclosure constructed from heavy gauge steel, coated with RAL7035 powder paint
Suitable for IP55 Enclosure applications for both indoor and outdoor
Spacious wiring compartment, cool and easily accessible (bottom or front access may depend on size)
Solution for absorbing everyday power line disturbances
Best-in-class line/load reactors.
Most robust, highest continuous service factor.
Low watts loss.
Performance and durability that is unmatched by the competition.
Proven performance in the field
Reliable and economical
Compact and light-weight
Ideal for OEMs, integrators and panel builders.
Provision of 0.5-7 % impedance
Reduction of mains harmonics
Reduction of commutation notches
Protection of motor drive electronics
Limitation of inrush currents
Improvement of true power factor
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