How do you maintain oil in a transformer?

Here are 3 maintenance tests you should run on your transformer on a daily basis:

  1. Oil levels of MOG( Magnetic Oil Gauge) of the main tank and conservator tank. Always maintain to keep oil filled up to the desired level in MOG.
  2. Replace the silica gel if its color changes to pink.
  3. If any leakage is detected seal it.

What is the preventive maintenance of transformer?

The preventative maintenance of transformer involves routine inspection, adjustment, testing, minor repairs, and special handling instructions. In addition, the trouble-free operation of the equipment over its life is dependent upon proper installation, operation, and maintenance, which are discussed in Section 5.7.

What maintains oil level in transformer?

Working Principle of Magnetic Oil Gauge or MOG This vessel takes care of oil expansion due to temperature rise. When transformer insulating oil is expanded, the oil level in the conservator tank goes up. Again when oil volume is reduced due to fall in oil temperature, the oil level in the conservator goes down.

How do you maintain a distribution transformer?

  1. The distribution transformer forms a link between the consumers and primary distribution.
  2. Dielectric strength of transformer oil shall be checked once in a year.
  3. Acidity of transformer oil shall be checked once in a year.
  4. Oil level shall be checked once in a month.

What is the life of transformer oil?

In general, a transformer’s service life is determined by its performance characteristics and life expectancy of its dielectric insulating oil which is approximately 20 years.

What is shelf life of transformer oil?

Usual transformer oil storage time is five years from the date of production. After five years, the oil product loses its performance quality. Attempts to improve the situation by using additives are futile, the additive components simply precipitate from the oil.

How often should you change transformer oil?

Dissolve Gas Analysis of transformer oil should be done annually for 132kv transformer, once in 2 years for the transformer below 132kv transformer, and once in 2 years for the transformer above 132kv transformer.

Which oil is used in transformer oil?

mineral oil
Three basic types of transformer oil used are mineral oil (mostly naphthenic), silicone, and bio-based. Mineral oil based transformer oils dominate the consumption as it has good electrical and cooling properties, and provides cost-effective solution.

What is transformer oil level?

There is usually a mark on the gauge that indicates the 25°C level, which is the proper oil level at that temperature. Maintaining the proper oil level is extremely important because if the oil level falls below the level of the radiator inlet, flow through the radiator will cease and the transformer will overheat.

How do you check oil level in transformer?

To check the level indicator, remove the outside mechanism for testing without lowering transformer oil. After removing the gauge, hold a magnet on the back of the dial and rotate the magnet; the dial indicator should also rotate. If it fails to respond or if it drags or sticks, replace it.

What does oil in a transformer do?

Transformer oil is used to insulate high-voltage electrical infrastructure such as transformers, capacitors, switches and circuit breakers. Transformer oils are designed to operate effectively at very high temperatures, cooling, insulating, and stopping corona discharges and arcing.

Is transformer oil harmful?

The main constituent of transformer oil is polychlorinated biphenyl (PCB) which is responsible for producing toxicity in humans. Chronic exposure with PCB may cause some toxicity such as hepatotoxicity and neurotoxicity.