Transformers

Weather influences as well as constant load changes of transformers cause temperature fluctuations and thus a pressure equalization with the environment.
The moist ambient air drawn in during cooling leads to hydrolysis of the cellulose paper in the transformer and thus to a reduction in its degree of polymerization. GIEBEL dehumidifiers protect the transformer by effectively drying and filtering the humid supply air.
To prevent damage caused by condensation water, the use of a dehumidifier is an indispensable measure. The incoming air is dried and thus a strong reduction of the water content and the dew point is achieved. In addition to a mechanical valve system and an air filter element, these silica gel dryers make use of the regenerative capacity of the desiccant used.

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FORMATION OF WATER IN THE Transformer

FUNCTIONAL TRANSFORMATOR - HUMIDITY AND DEW POINT

DAMAGE CAUSED BY WATER

AVOIDANCE OF WATER IN THE TRANSFORMER

References

SELECTION OF A STANDARD ADSORBER

DETERMINATION OF SIZE

		DIN 42562	DIN 42567A	DIN 42567B	DIN 42567C G 1“ / G ¾“ / G ½“	DIN 42562	DIN 42567C G 1“
Adsorber	VV-RV	TB-RV				TM-RV
Usage	upright	hanging
Materials	Polycarbonate, polyamide, FKM Silica gel Orange	Aluminium, Polycarbonate, polyamide, FKM Silica gel Orange				Stainless steel A4, FKM Silica gel Orange
Usage according ATEX 2014	No	No				Yes
Use Indoor / below deck	Yes	Yes				Yes
Use outdoor / on land	Yes	Yes				Yes
Use on deck / offshore	No	No				Yes
Power/ oil volume
0 – 5 MVA up to approx. 2.500l oil	VV-RV 3M	TB-RV 3M	TB-RV 3M	TB-RV 3M	TB-RV 3M	TM-RV 3M	TM-RV 3M
5 – 10 MVA up to approx. 5.000l oil	VV-RV 3L	TB-RV 3L	TB-RV 3L	TB-RV 3L	TB-RV 3L	TM-RV 3L	TM-RV 3L
10 – 30 MVA up to approx. 15.000l oil		TB-RV 5M	TB-RV 5M	TB-RV 5M	TB-RV 5M	TB-RV 5M
30 – 60 MVA up to approx. 30.000l oil		TB-RV 5L			TB-RV 5L	TM-RV 5L
60 – 100 MVA up to approx. 50.000l oil		TB-RV 5XL				TM-RV 5XL