MANUFACTURING PROCESS OF CAST-RESIN TRANSFORMERS
(ABSTRACT)
A variety of types of electrical transformers are made for different purposes. Despite their design differences, the various types employ the same basic principle i.e. electro magnetic induction, coming to cast resin transformer its soul purpose is to over come the problems like pollution, heavy noise and vibration, high maintenance cost, poor reliability and installation problems. Cast-resin power transformers encase the windings in epoxy resin. These transformers simplify installation since they are dry, without cooling oil, and so require no fire-proof vault for indoor installations. The epoxy protects the windings from dust and corrosive atmospheres. At 100% load factor the cast-resin transformers are more cost effective.
This project is mainly dealing with the case study of the process of manufacturing the CRT. Which starts with making of HV coils, LV coils, core separately and assembling them on bi-directional rollers and then the necessary accessories like thermistors, relay with alarm are provided and then the necessary tests are conducted to finally certify the product.
It is mostly used in service in diverse industries, Electricity Boards, Nuclear / Thermal / Hydral Power Plants, Railway Traction and high-rise buildings, hospitals, subways, underground vaults, tunnels, school, steel factories, chemical plants, etc. where safety is of prime concern.

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Since the main / coil assemblies are somewhat different among manufacturers, the following recommendations should be used as the starting point for continuous continuous casting process. Crosslink Technology Inc. Many make up casting systems, which look closely to achieve excellent results in case of crank resistance, partial discharge and accuracy.

Depending on the design and construction, whether or not the pillows are employed, some devices may require more or less hard compounds

General Recommendation:
Minimize the number of edges of pillow (no choice), intense edges by cushioning may cause micro-cracks in the encapsulant during the treatment process.
Remove sharp edges with curved insulation.
Recommended minimum wall thickness is 3.17 mm (1/8 ") for any area encapsulant.