Why choose Varelen oil immersed transformer? Safe and environmental friendly transformers
1. Magnetic Core
The three-limb iron core is made of oblique cut Grain-oriented, seven-step silicon steel lamination insulated on both sides, guaranteeing low losses and low noise. It is protected on the surface with a flash-proof varnish in order to prevent the sheet from corrosion and to reduce the noise.
2. Transformer winding
The winding as the centerpiece of the transformer must be especially protected – both against high electrical stress due to external over voltages and against mechanical overloads by short circuits. Huarui transformers are systematically designed to meet these requirements. The windings are made of copper or aluminum. Low-voltage windings are made of strip or flat wire, and the high voltage windings are manufactured from round or profile wire. (“diamond-dotted paper”) bonds the winding into a compact block while drying and increases the short-circuit capacity additionally.
3. Paiting
oil Immersed Transformers colour is RAL 7033. Transformer tanks are painted by the method of dipping or spraying. and offer anti-corrosion paint C5, also can supply (zinc coating) according to the customer requirements.
Areas of applications
Oil immersed Distribution transformers by Varelen used for a wide range of applications.
| Main Specification | |
| Transformer Type | Oil immersed |
| Rated capacity | up to 40mva |
| Rated voltage | up to 66kv |
| Frequency | 50/60Hz |
| Phase | 3 Phase |
| Winding material | Copper /Aluminum |
| Tap changer | Off-load or on-load |
| Vector group | YNd1d1/ Dyn11 |
| Cooling | ONAN /ONAF/ KNAN/ KNAF |
|
Ambient temperature |
-20°C to +40°C |
|
Insulation class |
A |
| Dielectric fluids | Mineral oil / Dimethyl Silicone/ FR3 oil /MIDEL 7131 |
| Accessories |
Bushing Oil level gauge Transformer tank pressure relief valve Tap changer Oil Thermometer Buchholz-Relay Lifting Lugs |
Routine test
Type test
Special Test
