Oil Immersed Transformers

 

Oil immersed transformers offer a customize and reliable solution for the customer as the typical design allows many configurations and installations.
Thanks to their design, oil immersed transformers are used either for indoor or outdoor installations and in high polluted places.

HERMETIC

WITH CONSERVATOR

OIL IMMERSED CATALOG

ADVANTAGES

LONG LIFE
The know-how and experience in the casting process allow a low level of partial discharge.

COMPACT DESIGN
Optimized dimensions and terminals arrangement for critical situation of space.

HIGH ENVIRONMENTAL RESISTANCE
Specific treatment for magnetic core and frames to withstand the most extreme environmental conditions.

HEAVY DUTY
Special design structure for seismic zones or for using in applications with high level vibrations.

ECO-FRIENDLY
Research and development of the most performing materials combined with an advanced design for high energy efficiency. Safe to use and easy to dispose.

STANDARD ACCESSORIES

HERMETIC

WITH CONSERVATOR

ACCESSORIES UPON REQUEST

DGPT2
Device used for keeping under control pressure, temperature and level of the liquid inside the transformer tank.

WINDINGS TEMPERATURE INDICATOR
Device used to measure the winding temperature in the liquid immersed transformers by indirect way using thermal image tecnology. It can be provided with max 4 SPDT switches.

DIAL TYPE THERMOMETER


OVERPRESSURE VALVE

In case of sudden and violent internal short circuit the insulating liquid produces a large volume of gas that should be evacuated in order to avoid the explosion of the transformer.


ELASTIMOLD (FIX PART)

The plug connection allows a very rapid connection of the cable to the transformer and can be touched when the transformer is under voltage.


VIBRATION DUMPERS

Accessories to be assembled under the wheels in order to reduce noise and structural resonances.


AUXILIARY TERMINAL BOX

Auxiliary terminal box centralizes the auxiliary services and protects the terminal board.

SILICAGEL BREATHER
The aim of this device is absorbing the humidity air that the transformer sucks during the thermal contraction of the liquid in order to guarantee a better dielectric capacitance.

BUCHHOLZ RELAY 
This device intercepts and collects any gas bubble coming from the inner side of the transformer (indicating short circuit or other inner faults) and/or signals any oil leakage from the tank, giving an alarm signal or tripping one.

OIL LEVEL
This device gives a visual signal of the oil level in the conservator.

WINDINGS TEMPERATURE INDICATOR
Device used to measure the winding temperature in the liquid immersed transformers by indirect way using thermal image tecnology. It can be provided with max 4 SPDT switches.

DIAL TYPE THERMOMETER


ELASTIMOLD (FIX PART)

The plug connection allows a very rapid connection of the cable to the transformer and can be touched when the transformer is under voltage.


VIBRATION DUMPERS

Accessories to be assembled under the wheels in order to reduce noise and structural resonances.


AUXILIARY TERMINAL BOX

Auxiliary terminal box centralizes the auxiliary services and protects the terminal board.


ON LOAD TAP CHANGER

TESTS

ROUTINE TEST

To be performed according to IEC 60076-1:

    • Measurement of winding resistance
    • Measurement of voltage ratio
    • Checking of phase displacement
    • Dielectric routine tests
    • Measurement of no-load losses and current
    • Measurement of short-circuit impedance and load losses
    • Test of accessories
TYPE TESTS


Can be performed:

  • Lightning impulse test
  • Temperature rise test
  • Determination of sound level
SPECIAL TESTS

Can be performed:

  • Short-circuit withstand test
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