Features
In general meaning of Cast Resin Transformers; transformers are such that their magnetic circuit and windings had not been plunged into a insulating liquid. Windings of this type of transformers had been produced using conductors which have E and H class insulation until the 1970s. However, it usually could not been gotten above the level of 10 kV due to the dielectric resistance. The developments in the resin technology since 1970s have solved the problems related with processing of resin, partial discharge and life of resin. Nowadays, cast resin transformers which their windings covered with epoxy resin and are widely used ( including 36 kV voltage level) are began to manufacture.
The design of the cast resin transformers which their windings were covered with cast resin epoxy:
The difference between these type of transformers and oily type transformers is that their magnetic circuit and windings had not been plunged into a insulating liquid. Windings are covered and insulated with glass fiber-reinforced epoxy. The cooling medium is air.
Features
1. Epoxy which is used for insulation of windings has features such that hard-flammable, self-extinguishing and not release toxic gas to the environment when exposed to the arc.
2. It is highly resistant to moisture. There is no objection to work in 100% humid environment.
3. With the addition of fan cooling system, it is possible to increase the power capacity of up to 50%.
4. There is Temperature Control System that protects only windings as protection and signal equipment against high temperature of environment or unpermitted overheating which is the result of overloading.
5. It can be used safely in places which people are dense in taking into enclosing.
6. It is highly resistant to by-pass due to the design of windings. It does not need maintenance during the life of operation. Therefore, the operation expenditures is almost non existing.
Usage Areas
Distribution Substations
Hotels-Marinas
Commercial Building – Business Centers
Hospitals
Shopping Centers
Barrages
Railway Systems
Pump Stations
Airports
Factories
Parts
1. LV Inlet
2. HV Inlet
3. LV Winding (secondary)
4. HV Winding (primary)
5. The tap-changer, When idle
6. Magnetic Core
7. Magnetic core that secures the parts
8. Cylinder component with dirigible wheels
9. Earthing switch inlet
10.Lifting holes
11. Label plate
12.Auxilary circuit box
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